# Test Suite and Sample InputsΒΆ

PSI4 is distributed with an extensive test suite, which can
be found in psi4/tests. After building the source code, these
can automatically be run by running `ctest`

in the compilation
directory. More info on `ctest`

options can be found
here. Sample input files
can be found in the psi4/samples subdirectory of the top-level Psi
directory. The samples and a brief description are provided below.

Sample inputs accessible through interfaced executables are bulleted below.

Sample inputs for PSI4 as distributed are below.

Input File | Description |
---|---|

opt1-fd | SCF STO-3G geometry optimzation, with Z-matrix input, by finite-differences |

cc5a | RHF CCSD(T) STO-3G frozen-core energy of C4NH4 Anion |

dft-psivar | HF and DFT variants single-points on zmat methane, mostly to test that PSI variables are set and computed correctly. Now also testing that CSX harvesting PSI variables correctly |

dcft7 | DCFT calculation for the triplet O2 using ODC-06 and ODC-12 functionals. Only simultaneous algorithm is tested. |

dfccsdl1 | DF-CCSDL cc-pVDZ energy for the H2O molecule. |

opt6 | Various constrained energy minimizations of HOOH with cc-pvdz RHF Internal-coordinate constraints in internal-coordinate optimizations. |

ci-property | CI/MCSCF cc-pvDZ properties for Potassium nitrate (rocket fuel!) |

cisd-sp-2 | 6-31G** H2O Test CISD Energy Point |

mints4 | A demonstration of mixed Cartesian/ZMatrix geometry specification, using variables, for the benzene-hydronium complex. Atoms can be placed using ZMatrix coordinates, whether they belong to the same fragment or not. Note that the Cartesian specification must come before the ZMatrix entries because the former define absolute positions, while the latter are relative. |

mp2p5-grad2 | MP2.5 cc-pVDZ gradient for the NO radical |

isapt1 | This test case shows an example of running and analyzing an FI-SAPT0/jun-cc-pvdz computation for 2,4-pentanediol (targeting the intramolecular hydrogen bond between the two hydroxyl groups) |

cc4 | RHF-CCSD(T) cc-pVQZ frozen-core energy of the BH molecule, with Cartesian input. After the computation, the checkpoint file is renamed, using the PSIO handler. |

rasci-ne | Ne atom RASCI/cc-pVQZ Example of split-virtual CISD[TQ] from Sherrill and Schaefer, J. Phys. Chem. XXX This uses a “primary” virtual space 3s3p (RAS 2), a “secondary” virtual space 3d4s4p4d4f (RAS 3), and a “tertiary” virtual space consisting of the remaining virtuals. First, an initial CISD computation is run to get the natural orbitals; this allows a meaningful partitioning of the virtual orbitals into groups of different importance. Next, the RASCI is run. The split-virtual CISD[TQ] takes all singles and doubles, and all triples and quadruples with no more than 2 electrons in the secondary virtual subspace (RAS 3). If any electrons are present in the tertiary virtual subspace (RAS 4), then that excitation is only allowed if it is a single or double. |

opt2 | SCF DZ allene geometry optimization, with Cartesian input, first in c2v symmetry, then in Cs symmetry from a starting point with a non-linear central bond angle. |

cepa1 | cc-pvdz H2O Test CEPA(1) Energy |

psimrcc-ccsd_t-2 | Mk-MRCCSD(T) single point. \(^1A_1\) CH2 state described using the Ms = 0 component of the singlet. Uses RHF singlet orbitals. |

mp2-property | MP2 cc-pvDZ properties for Nitrogen oxide |

mcscf1 | ROHF 6-31G** energy of the \(^{3}B_1\) state of CH2, with Z-matrix input. The occupations are specified explicitly. |

numpy-array-interface | Numpy interface testing |

mints1 | Symmetry tests for a range of molecules. This doesn’t actually compute any energies, but serves as an example of the many ways to specify geometries in Psi4. |

cc46 | EOM-CC2/cc-pVDZ on H2O2 with two excited states in each irrep |

scf4 | RHF cc-pVDZ energy for water, automatically scanning the symmetric stretch and bending coordinates using Python’s built-in loop mechanisms. The geometry is specified using a Z-matrix with variables that are updated during the potential energy surface scan, and then the same procedure is performed using polar coordinates, converted to Cartesian coordinates. |

dfcasscf-sa-sp | Example of state-averaged CASSCF for the C2 molecule |

psimrcc-ccsd_t-1 | Mk-MRCCSD(T) single point. \(^1A_1\) CH2 state described using the Ms = 0 component of the singlet. Uses RHF singlet orbitals. |

opt1 | SCF STO-3G geometry optimzation, with Z-matrix input |

scf-bs | UHF and broken-symmetry UHF energy for molecular hydrogen. |

cc53 | Matches Table II a-CCSD(T)/cc-pVDZ H2O @ 2.5 * Re value from Crawford and Stanton, IJQC 98, 601-611 (1998). |

dcft9 | UHF-ODC-12 and RHF-ODC-12 single-point energy for H2O. This performs a simultaneous update of orbitals and cumulants, using DIIS extrapolation. Four-virtual integrals are handled in the AO basis, where integral transformation is avoided. In the next RHF-ODC-12 computation, AO_BASIS=NONE is used, where four-virtual integrals are transformed into MO basis. |

cc8c | ROHF-CCSD cc-pVDZ frozen-core energy for the \(^2\Sigma^+\) state of the CN radical, with Cartesian input. |

mp2-grad1 | MP2 cc-pVDZ gradient for the H2O molecule. |

mp2-1 | All-electron MP2 6-31G** geometry optimization of water |

rasscf-sp | 6-31G** H2O Test RASSCF Energy Point will default to only singles and doubles in the active space |

cc9a | ROHF-CCSD(T) cc-pVDZ energy for the \(^2\Sigma^+\) state of the CN radical, with Z-matrix input. |

opt-irc-2 | Compute the IRC for HCN <-> NCH interconversion at the RHF/DZP level of theory. |

omp3-grad1 | OMP3 cc-pVDZ gradient for the H2O molecule. |

mp3-grad2 | MP3 cc-pVDZ gradient for the NO radical |

cc52 | CCSD Response for H2O2 |

pywrap-checkrun-rhf | This checks that all energy methods can run with a minimal input and set symmetry. |

cc11 | Frozen-core CCSD(ROHF)/cc-pVDZ on CN radical with disk-based AO algorithm |

cc9 | UHF-CCSD(T) cc-pVDZ frozen-core energy for the \(^2\Sigma^+\) state of the CN radical, with Z-matrix input. |

omp2p5-grad2 | OMP2.5 cc-pVDZ gradient for the NO radical |

cubeprop-esp | RHF orbitals and density for water. |

omp2-grad1 | OMP2 cc-pVDZ gradient for the H2O molecule. |

dfmp2-grad2 | DF-MP2 cc-pVDZ gradient for the NO molecule. |

pubchem2 | Superficial test of PubChem interface |

cc55 | EOM-CCSD/6-31g excited state transition data for water with two excited states per irrep |

cc13b | Tests RHF CCSD(T)gradients |

cisd-h2o-clpse | 6-31G** H2O Test CISD Energy Point with subspace collapse |

dcft4 | DCFT calculation for the HF+ using DC-06 functional. This performs both two-step and simultaneous update of the orbitals and cumulant using DIIS extrapolation. Four-virtual integrals are first handled in the MO Basis for the first two energy computations. In the next two the ao_basis=disk algorithm is used, where the transformation of integrals for four-virtual case is avoided. The computation is then repeated using the DC-12 functional with the same algorithms. |

cepa0-grad1 | CEPA0 cc-pVDZ gradient for the H2O molecule. |

cc32 | CC3/cc-pVDZ H2O \(R_e\) geom from Olsen et al., JCP 104, 8007 (1996) |

props3 | DF-SCF cc-pVDZ multipole moments of benzene, up to 7th order and electrostatic potentials evaluated at the nuclear coordinates |

pywrap-cbs1 | Various basis set extrapolation tests |

cc50 | EOM-CC3(ROHF) on CH radical with user-specified basis and properties for particular root |

dfomp3-grad2 | DF-OMP3 cc-pVDZ gradients for the H2O+ cation. |

cc47 | EOM-CCSD/cc-pVDZ on H2O2 with two excited states in each irrep |

dfomp3-1 | DF-OMP3 cc-pVDZ energy for the H2O molecule. |

dft3 | DFT integral algorithms test, performing w-B97 RKS and UKS computations on water and its cation, using all of the different integral algorithms. This tests both the ERI and ERF integrals. |

dfccsdat1 | DF-CCSD(AT) cc-pVDZ energy for the H2O molecule. |

cc44 | Test case for some of the PSI4 out-of-core codes. The code is given only 2.0 MB of memory, which is insufficient to hold either the A1 or B2 blocks of an ovvv quantity in-core, but is sufficient to hold at least two copies of an oovv quantity in-core. |

cc2 | 6-31G** H2O CCSD optimization by energies, with Z-Matrix input |

dft-dldf | Dispersionless density functional (dlDF+D) internal match to Psi4 Extensive testing has been done to match supplemental info of Szalewicz et. al., Phys. Rev. Lett., 103, 263201 (2009) and Szalewicz et. al., J. Phys. Chem. Lett., 1, 550-555 (2010) |

dfomp2-grad1 | DF-OMP2 cc-pVDZ gradients for the H2O molecule. |

cc33 | CC3(UHF)/cc-pVDZ H2O \(R_e\) geom from Olsen et al., JCP 104, 8007 (1996) |

dfccdl1 | DF-CCDL cc-pVDZ energy for the H2O molecule. |

cbs-xtpl-energy | Extrapolated water energies |

dfomp2-3 | OMP2 cc-pVDZ energy for the H2O molecule. |

pywrap-molecule | Check that C++ Molecule class and qcdb molecule class are reading molecule input strings identically |

soscf2 | Triple and Singlet Oxygen energy SOSCF, also tests non-symmetric density matrices |

dfmp2-4 | conventional and density-fitting mp2 test of mp2 itself and setting scs-mp2 |

dft-freq | Frequencies for H2O B3LYP/6-31G* at optimized geometry |

mints5 | Tests to determine full point group symmetry. Currently, these only matter for the rotational symmetry number in thermodynamic computations. |

cc30 | CCSD/sto-3g optical rotation calculation (length gauge only) at two frequencies on methyloxirane |

dft-pbe0-2 | Internal match to psi4, test to match to literature values in litref.in/litref.out |

mints3 | Test individual integral objects for correctness. |

ocepa1 | OCEPA cc-pVDZ energy for the H2O molecule. |

cc29 | CCSD/cc-pVDZ optical rotation calculation (both gauges) on Cartesian H2O2 |

dfomp2p5-1 | DF-OMP2.5 cc-pVDZ energy for the H2O molecule. |

opt13 | B3LYP cc-pVDZ geometry optimzation of phenylacetylene, starting from not quite linear structure |

mpn-bh | MP(n)/aug-cc-pVDZ BH Energy Point, with n=2-19. Compare against M. L. Leininger et al., J. Chem. Phys. 112, 9213 (2000) |

molden1 | Test of the superposition of atomic densities (SAD) guess, using a highly distorted water geometry with a cc-pVDZ basis set. This is just a test of the code and the user need only specify guess=sad to the SCF module’s (or global) options in order to use a SAD guess. The test is first performed in C2v symmetry, and then in C1. |

fd-freq-gradient-large | SCF DZ finite difference frequencies by energies for C4NH4 |

mcscf3 | RHF 6-31G** energy of water, using the MCSCF module and Z-matrix input. |

dcft2 | DC-06 calculation for the He dimer. This performs a two-step update of the orbitals and cumulant, using DIIS extrapolation. Four-virtual integrals are handled in the MO Basis. |

fd-gradient | SCF STO-3G finite-difference tests |

opt-freeze-coords | SCF/cc-pVDZ optimization example with frozen cartesian |

opt7 | Various constrained energy minimizations of HOOH with cc-pvdz RHF. For “fixed” coordinates, the final value is provided by the user. |

extern2 | External potential calculation involving a TIP3P water and a QM water for DFMP2. Finite different test of the gradient is performed to validate forces. |

scf-occ | force occupations in scf |

pywrap-db3 | Test that Python Molecule class processes geometry like psi4 Molecule class. |

mp2p5-grad1 | MP2.5 cc-pVDZ gradient for the H2O molecule. |

tu5-sapt | Example SAPT computation for ethene*ethine (i.e., ethylene*acetylene), test case 16 from the S22 database |

fci-h2o-fzcv | 6-31G H2O Test FCI Energy Point |

pywrap-freq-e-sowreap | Finite difference of energies frequency, run in sow/reap mode. |

mints6 | Patch of a glycine with a methyl group, to make alanine, then DF-SCF energy calculation with the cc-pVDZ basis set |

omp2p5-1 | OMP2 cc-pVDZ energy for the H2O molecule. |

cc8b | ROHF-CCSD cc-pVDZ frozen-core energy for the \(^2\Sigma^+\) state of the CN radical, with Cartesian input. |

fci-tdm | He2+ FCI/cc-pVDZ Transition Dipole Moment |

dft1-alt | DFT Functional Test |

psimrcc-ccsd_t-4 | Mk-MRCCSD(T) single point. \(^1A_1\) O$_3` state described using the Ms = 0 component of the singlet. Uses TCSCF orbitals. |

opt11 | Transition-state optimizations of HOOH to both torsional transition states. |

psimrcc-fd-freq1 | Mk-MRCCSD single point. \(^3 \Sigma ^-\) O2 state described using the Ms = 0 component of the triplet. Uses ROHF triplet orbitals. |

dfccd1 | DF-CCD cc-pVDZ energy for the H2O molecule. |

adc2 | ADC/aug-cc-pVDZ on two water molecules that are distant from 1000 angstroms from each other |

tu1-h2o-energy | Sample HF/cc-pVDZ H2O computation |

fnocc4 | Test FNO-DF-CCSD(T) energy |

cc26 | Single-point gradient, analytic and via finite-differences of 2-1A1 state of H2O with EOM-CCSD |

cc45 | RHF-EOM-CC2/cc-pVDZ lowest two states of each symmetry of H2O. |

cc38 | RHF-CC2-LR/cc-pVDZ static polarizabilities of HOF molecule. |

omp2-5 | SOS-OMP2 cc-pVDZ geometry optimization for the H2O molecule. |

scf11-freq-from-energies | Test frequencies by finite differences of energies for planar C4NH4 TS |

extern1 | External potential calculation involving a TIP3P water and a QM water. Finite different test of the gradient is performed to validate forces. |

scf5 | Test of all different algorithms and reference types for SCF, on singlet and triplet O2, using the cc-pVTZ basis set. |

casscf-fzc-sp | CASSCF/6-31G** energy point |

scf6 | Tests RHF/ROHF/UHF SCF gradients |

cbs-xtpl-opt | Various extrapolated optimization methods for the H2 molecule |

cepa2 | cc-pvdz H2O Test ACPF Energy/Properties |

opt12 | SCF cc-pVDZ geometry optimzation of ketene, starting from bent structure |

dfccsd-grad1 | DF-CCSD cc-pVDZ gradients for the H2O molecule. |

props2 | DF-SCF cc-pVDZ of benzene-hydronium ion, scanning the dissociation coordinate with Python’s built-in loop mechanism. The geometry is specified by a Z-matrix with dummy atoms, fixed parameters, updated parameters, and separate charge/multiplicity specifiers for each monomer. One-electron properties computed for dimer and one monomer. |

ao-dfcasscf-sp | CASSCF/6-31G** energy point |

scf-guess-read1 | Sample UHF/cc-pVDZ H2O computation on a doublet cation, using RHF/cc-pVDZ orbitals for the closed-shell neutral as a guess |

cbs-xtpl-wrapper | RHF aug-cc-pVQZ energy for the BH molecule, with Cartesian input. Various gradients for a strained helium dimer and water molecule |

psithon1 | Spectroscopic constants of H2, and the full ci cc-pVTZ level of theory |

cisd-sp | 6-31G** H2O Test CISD Energy Point |

cepa0-grad2 | CEPA cc-pVDZ gradient for the NO radical |

sapt3 | SAPT2+3(CCD) aug-cc-pVDZ computation of the water dimer interaction energy, using the aug-cc-pVDZ-JKFIT DF basis for SCF and aug-cc-pVDZ-RI for SAPT. |

cdomp2-1 | OMP2 cc-pVDZ energy for the H2O molecule. |

sapt5 | SAPT0 aug-cc-pVTZ computation of the charge transfer energy of the water dimer. |

tu4-h2o-freq | Optimization followed by frequencies H2O HF/cc-pVDZ |

sapt8 | SAPT0(ROHF) open-shell computation of CN - Ne interaction energy First with jun-cc-pVDZ and density fitted integrals with ROHF Then with cc-pVDZ and direct integrals, except for dispersion that is computed with cc-pVDZ-ri density fitting with ROHF. |

dcft6 | DCFT calculation for the triplet O2 using DC-06, DC-12 and CEPA0 functionals. Only two-step algorithm is tested. |

cepa3 | cc-pvdz H2O Test coupled-pair CISD against DETCI CISD |

cdomp2-2 | OMP2 cc-pVDZ energy for the NO molecule. |

omp2p5-2 | OMP2 cc-pVDZ energy for the H2O molecule. |

cc15 | RHF-B-CCD(T)/6-31G** H2O single-point energy (fzc, MO-basis \(\langle ab|cd \rangle\)) |

cc49 | EOM-CC3(UHF) on CH radical with user-specified basis and properties for particular root |

opt10 | 6-31G MP2 transition-state optimization with initial, computed Hessian. |

pywrap-db2 | Database calculation, run in sow/reap mode. |

freq-isotope | Vibrational and thermo analysis of several water isotopologs. Demonstrates Hessian reuse for different temperatures and pressures but not for different isotopologs. |

casscf-sa-sp | Example of state-averaged CASSCF for the C2 molecule see C. D. Sherrill and P. Piecuch, J. Chem. Phys. 122, 124104 (2005) |

cbs-xtpl-gradient | Various gradients for a strained helium dimer and water molecule |

dfmp2-1 | Density fitted MP2 cc-PVDZ/cc-pVDZ-RI computation of formic acid dimer binding energy using automatic counterpoise correction. Monomers are specified using Cartesian coordinates. |

omp2-grad2 | OMP2 cc-pVDZ gradient for the NO radical |

cc14 | ROHF-CCSD/cc-pVDZ \(^{3}B_1\) CH2 geometry optimization via analytic gradients |

fsapt-diff1 | This test case shows an example of running and analyzing a difference F-SAPT0/jun-cc-pvdz procedure for phenol dimer from the S22 database. |

isapt2 | This is a shorter version if isapt1 - does not do cube plots. See isapt1 for full details |

dfcasscf-sp | CASSCF/6-31G** energy point |

cc27 | Single point gradient of 1-1B2 state of H2O with EOM-CCSD |

cc3 | cc3: RHF-CCSD/6-31G** H2O geometry optimization and vibrational frequency analysis by finite-differences of gradients |

ghosts | Density fitted MP2 cc-PVDZ/cc-pVDZ-RI computation of formic acid dimer binding energy using explicit specification of ghost atoms. This is equivalent to the dfmp2_1 sample but uses both (equivalent) specifications of ghost atoms in a manual counterpoise correction. |

tu3-h2o-opt | Optimize H2O HF/cc-pVDZ |

cbs-xtpl-func | optimization with method defined via cbs |

cc36 | CC2(RHF)/cc-pVDZ energy of H2O. |

cc48 | reproduces dipole moments in J.F. Stanton’s “biorthogonal” JCP paper |

cc13 | UHF-CCSD/cc-pVDZ \(^{3}B_1\) CH2 geometry optimization via analytic gradients |

scf-property | UFH and B3LYP cc-pVQZ properties for the CH2 molecule. |

cisd-h2o+-1 | 6-31G** H2O+ Test CISD Energy Point |

opt-multi-dimer-c1 | Multi-fragment opt of C2h methane dimer with user-combined reference points. |

fci-dipole | 6-31G H2O Test FCI Energy Point |

dft1 | DFT Functional Test |

dfomp2-1 | OMP2 cc-pVDZ energy for the H2O molecule. |

cisd-opt-fd | H2O CISD/6-31G** Optimize Geometry by Energies |

omp2p5-grad1 | OMP2.5 cc-pVDZ gradient for the H2O molecule. |

sapt7 | SAPT0 open-shell computation of H2O-HO2 interaction energy First with cc-pVDZ and density fitted integrals with UHF Then with 6-31g and direct integrals, except for dispersion that is computed with cc-pVDZ-ri density fitting with UHF. |

opt5 | 6-31G** UHF CH2 3B1 optimization. Uses a Z-Matrix with dummy atoms, just for demo and testing purposes. |

pywrap-alias | Test parsed and exotic calls to energy() like zapt4, mp2.5, and cisd are working |

cc16 | ROHF and UHF-B-CCD(T)/cc-pVDZ \(^{3}B_1\) CH2 single-point energy (fzc, MO-basis \(\langle ab|cd \rangle\) ) |

opt3 | SCF cc-pVDZ geometry optimzation, with Z-matrix input |

cc23 | ROHF-EOM-CCSD/DZ analytic gradient lowest \(^{2}B_1\) state of H2O+ (A1 excitation) |

dfmp2-grad3 | DF-MP2 cc-pVDZ gradients for the H2O molecule. |

mints9 | A test of the basis specification. Various basis sets are specified outright and in blocks, both orbital and auxiliary. Constructs libmints BasisSet objects through the constructor that calls qcdb.BasisSet infrastructure. Checks that the resulting bases are of the right size and checks that symmetry of the Molecule observes the basis assignment to atoms. |

opt4 | SCF cc-pVTZ geometry optimzation, with Z-matrix input |

cc54 | CCSD dipole with user-specified basis set |

cc12 | Single point energies of multiple excited states with EOM-CCSD |

cc6 | Frozen-core CCSD(T)/cc-pVDZ on C4H4N anion with disk ao algorithm |

dfomp2-2 | OMP2 cc-pVDZ energy for the NO molecule. |

opt-multi-frozen-dimer-c2h | Frozen-fragment opt of C2h methane dimer with user-combined reference points. |

scf2 | RI-SCF cc-pVTZ energy of water, with Z-matrix input and cc-pVTZ-RI auxilliary basis. |

stability1 | UHF->UHF stability analysis test for BH with cc-pVDZ Test direct SCF with and without symmetry, test PK without symmetry |

cc31 | CCSD/sto-3g optical rotation calculation (both gauges) at two frequencies on methyloxirane |

opt9 | Various constrained energy minimizations of HOOH with cc-pvdz RHF. Cartesian-coordinate constrained optimizations of HOOH in internals. |

omp2-3 | OMP2 cc-pVDZ energy for the NO radical |

cc35 | CC3(ROHF)/cc-pVDZ H2O \(R_e\) geom from Olsen et al., JCP 104, 8007 (1996) |

opt-multi-dimer-c2h | Multi-fragment opt of C2h methane dimer with user-combined reference points. |

fsapt1 | This test case shows an example of running and analyzing a standard F-SAPT0/jun-cc-pvdz procedure for phenol dimer from the S22 database. |

dfscf-bz2 | Benzene Dimer DF-HF/cc-pVDZ |

omp3-3 | OMP3 cc-pVDZ energy with B3LYP initial guess for the NO radical |

cisd-h2o+-0 | 6-31G** H2O+ Test CISD Energy Point |

cc8 | UHF-CCSD(T) cc-pVDZ frozen-core energy for the \(^2\Sigma^+\) state of the CN radical, with Z-matrix input. |

dfmp2-grad5 | Tests DF-MP2 gradient in the presence of a dipole field |

fnocc3 | Test FNO-QCISD(T) computation |

cc13c | Tests RHF CCSD(T)gradients |

soscf1 | Second-order SCF convergnece: Benzene |

cc51 | EOM-CC3/cc-pVTZ on H2O |

omp2-1 | OMP2 cc-pVDZ energy for the H2O molecule. |

pywrap-basis | SAPT calculation on bimolecular complex where monomers are unspecified so driver auto-fragments it. Basis set and auxiliary basis sets are assigned by atom type. |

omp3-5 | SOS-OMP3 cc-pVDZ geometry optimization for the H2O molecule. |

dcft1 | DC-06, DC-12, ODC-06 and ODC-12 calculation for the He dimer. This performs a simultaneous update of the orbitals and cumulant, using DIIS extrapolation. Four-virtual integrals are handled in the MO Basis. |

x2c1 | Test of SFX2C-1e on water uncontracted cc-pVDZ-DK The reference numbers are from Lan Cheng’s implementation in Cfour |

zaptn-nh2 | ZAPT(n)/6-31G NH2 Energy Point, with n=2-25 |

dfomp2-4 | OMP2 cc-pVDZ energy for the NO molecule. |

fd-freq-energy-large | SCF DZ finite difference frequencies by energies for C4NH4 |

omp2-2 | OMP2 cc-pVDZ energy with ROHF initial guess orbitals for the NO radical |

dcft8 | DCFT calculation for the NH3+ radical using the ODC-12 and ODC-13 functionals. This performs both simultaneous and QC update of the orbitals and cumulant using DIIS extrapolation. Four-virtual integrals are first handled in the MO Basis for the first two energy computations. In the next computation ao_basis=disk algorithm is used, where the transformation of integrals for four-virtual case is avoided. |

x2c3 | Test of SFX2C-1e on Water uncontracted cc-pVDZ The reference numbers are from Lan Cheng’s implementation in Cfour |

pywrap-checkrun-convcrit | Advanced python example sets different sets of scf/post-scf conv crit and check to be sure computation has actually converged to the expected accuracy. |

omp2-4 | SCS-OMP2 cc-pVDZ geometry optimization for the H2O molecule. |

dcft-grad1 | DCFT DC-06 gradient for the O2 molecule with cc-pVDZ basis set |

adc1 | ADC/6-31G** on H2O |

cc28 | CCSD/cc-pVDZ optical rotation calculation (length gauge only) on Z-mat H2O2 |

cc1 | RHF-CCSD 6-31G** all-electron optimization of the H2O molecule |

ocepa-freq1 | OCEPA cc-pVDZ freqs for C2H2 |

sapt2 | SAPT0 aug-cc-pVDZ computation of the benzene-methane interaction energy, using the aug-pVDZ-JKFIT DF basis for SCF, the aug-cc-pVDZ-RI DF basis for SAPT0 induction and dispersion, and the aug-pVDZ-JKFIT DF basis for SAPT0 electrostatics and induction. This example uses frozen core as well as asyncronous I/O while forming the DF integrals and CPHF coefficients. |

dfmp2-grad1 | DF-MP2 cc-pVDZ gradients for the H2O molecule. |

dfomp2p5-2 | DF-OMP2.5 cc-pVDZ energy for the H2O+ cation |

props4 | Electrostatic potential and electric field evaluated on a grid around water. |

pubchem1 | Benzene vertical singlet-triplet energy difference computation, using the PubChem database to obtain the initial geometry, which is optimized at the HF/STO-3G level, before computing single point energies at the RHF, UHF and ROHF levels of theory. |

fnocc1 | Test QCISD(T) for H2O/cc-pvdz Energy |

dcft5 | DC-06 calculation for the O2 molecule (triplet ground state). This performs geometry optimization using two-step and simultaneous solution of the response equations for the analytic gradient. |

tu6-cp-ne2 | Example potential energy surface scan and CP-correction for Ne2 |

scf1 | RHF cc-pVQZ energy for the BH molecule, with Cartesian input. |

cc8a | ROHF-CCSD(T) cc-pVDZ frozen-core energy for the \(^2\Sigma^+\) state of the CN radical, with Cartesian input. |

cc41 | RHF-CC2-LR/cc-pVDZ optical rotation of H2O2. gauge = both, omega = (589 355 nm) |

dcft3 | DC-06 calculation for the He dimer. This performs a simultaneous update of the orbitals and cumulant, using DIIS extrapolation. Four-virtual integrals are handled in the AO Basis, using integrals stored on disk. |

mcscf2 | TCSCF cc-pVDZ energy of asymmetrically displaced ozone, with Z-matrix input. |

cc34 | RHF-CCSD/cc-pVDZ energy of H2O partitioned into pair energy contributions. |

ao-casscf-sp | CASSCF/6-31G** energy point |

cisd-h2o+-2 | 6-31G** H2O+ Test CISD Energy Point |

decontract | RHF/cc-pvdz-decontract HCl single-point energy Testing the in line -decontract option for basis sets |

scf-bz2 | Benzene Dimer Out-of-Core HF/cc-pVDZ |

mints2 | A test of the basis specification. A benzene atom is defined using a ZMatrix containing dummy atoms and various basis sets are assigned to different atoms. The symmetry of the molecule is automatically lowered to account for the different basis sets. |

mom | Maximum Overlap Method (MOM) Test. MOM is designed to stabilize SCF convergence and to target excited Slater determinants directly. |

cc40 | RHF-CC2-LR/cc-pVDZ optical rotation of H2O2. gauge = length, omega = (589 355 nm) |

castup2 | SCF with various combinations of pk/density-fitting, castup/no-castup, and spherical/cartesian settings. Demonstrates that puream setting is getting set by orbital basis for all df/castup parts of calc. Demonstrates that answer doesn’t depend on presence/absence of castup. Demonstrates (by comparison to castup3) that output file doesn’t depend on options (scf_type) being set global or local. This input uses global. |

opt-irc-1 | Compute the IRC for HOOH torsional rotation at the RHF/DZP level of theory. |

rasci-h2o | RASCI/6-31G** H2O Energy Point |

psimrcc-sp1 | Mk-MRCCSD single point. \(^3 \Sigma ^-\) O2 state described using the Ms = 0 component of the triplet. Uses ROHF triplet orbitals. |

cc4a | RHF-CCSD(T) cc-pVQZ frozen-core energy of the BH molecule, with Cartesian input. This version tests the FROZEN_DOCC option explicitly |

castup3 | SCF with various combinations of pk/density-fitting, castup/no-castup, and spherical/cartesian settings. Demonstrates that puream setting is getting set by orbital basis for all df/castup parts of calc. Demonstrates that answer doesn’t depend on presence/absence of castup. Demonstrates (by comparison to castup2) that output file doesn’t depend on options (scf_type) being set global or local. This input uses local. |

cc42 | RHF-CC2-LR/STO-3G optical rotation of (S)-methyloxirane. gauge = length, omega = (589 355 nm) |

matrix1 | An example of using BLAS and LAPACK calls directly from the Psi input file, demonstrating matrix multiplication, eigendecomposition, Cholesky decomposition and LU decomposition. These operations are performed on vectors and matrices provided from the Psi library. |

cc37 | CC2(UHF)/cc-pVDZ energy of H2O+. |

cubeprop | RHF orbitals and density for water. |

options1 | check all variety of options parsing |

cc39 | RHF-CC2-LR/cc-pVDZ dynamic polarizabilities of HOF molecule. |

castup1 | Test of SAD/Cast-up (mainly not dying due to file weirdness) |

psithon2 | Accesses basis sets, databases, plugins, and executables in non-install locations |

cc43 | RHF-CC2-LR/STO-3G optical rotation of (S)-methyloxirane. gauge = both, omega = (589 355 nm) |

dft2 | DFT Functional Test |

fci-h2o | 6-31G H2O Test FCI Energy Point |

psimrcc-pt2 | Mk-MRPT2 single point. \(^1A_1\) F2 state described using the Ms = 0 component of the singlet. Uses TCSCF singlet orbitals. |

fci-h2o-2 | 6-31G H2O Test FCI Energy Point |

props1 | RHF STO-3G dipole moment computation, performed by applying a finite electric field and numerical differentiation. |

sapt6 | checks that all SAPT physical components (elst, exch, indc, disp) and total IE are being computed correctly for SAPT2+3(CCD)dMP2/aug-cc-pvdz and all lesser methods thereof. |

cc19 | CCSD/cc-pVDZ dipole polarizability at two frequencies |

casscf-sp | CASSCF/6-31G** energy point |

mints8 | Patch of a glycine with a methyl group, to make alanine, then DF-SCF energy calculation with the cc-pVDZ basis set |

dfccsd1 | DF-CCSD cc-pVDZ energy for the H2O molecule. |

ocepa2 | OCEPA cc-pVDZ energy with B3LYP initial guess for the NO radical |

dft-b3lyp | Check flavors of B3LYP (b3lyp3/b3lyp5) against other programs |

cc5 | RHF CCSD(T) aug-cc-pvtz frozen-core energy of C4NH4 Anion |

dft-b2plyp | Double-hybrid density functional B2PYLP. Reproduces portion of Table I in S. Grimme’s J. Chem. Phys 124 034108 (2006) paper defining the functional. |

dcft-grad4 | Unrestricted DF-DCFT ODC-12 gradient for O2 with cc-pVTZ/cc-pVTZ-RI standard/auxiliary basis set |

cc18 | RHF-CCSD-LR/cc-pVDZ static polarizability of HOF |

x2c2 | Test of SFX2C-1e on Water cc-pVDZ-DK. In this test the Dirac equation is solved in the uncontracted cc-pVDZ-DK basis. The reference numbers are from Lan Cheng’s implementation in Cfour |

gibbs | Test Gibbs free energies at 298 K of N2, H2O, and CH4. |

scf3 | File retention, docc, socc, and bond distances specified explicitly. |

mp3-grad1 | MP3 cc-pVDZ gradient for the H2O molecule. |

omp3-4 | SCS-OMP3 cc-pVDZ geometry optimization for the H2O molecule. |

dfomp2-grad2 | OMP2 cc-pVDZ energy for the NO molecule. |

omp3-2 | OMP3 cc-pVDZ energy with ROHF initial guess for the NO radical |

mp2-grad2 | MP2 cc-pVDZ gradient for the NO radical |

molden2 | Test of the superposition of atomic densities (SAD) guess, using a highly distorted water geometry with a cc-pVDZ basis set. This is just a test of the code and the user need only specify guess=sad to the SCF module’s (or global) options in order to use a SAD guess. The test is first performed in C2v symmetry, and then in C1. |

cc22 | ROHF-EOM-CCSD/DZ on the lowest two states of each irrep in \(^{3}B_1\) CH2. |

fd-freq-gradient | STO-3G frequencies for H2O by finite-differences of gradients |

sapt1 | SAPT0 cc-pVDZ computation of the ethene-ethyne interaction energy, using the cc-pVDZ-JKFIT RI basis for SCF and cc-pVDZ-RI for SAPT. Monomer geometries are specified using Cartesian coordinates. |

rasci-c2-active | 6-31G* C2 Test RASCI Energy Point, testing two different ways of specifying the active space, either with the ACTIVE keyword, or with RAS1, RAS2, RESTRICTED_DOCC, and RESTRICTED_UOCC |

cc10 | ROHF-CCSD cc-pVDZ energy for the \(^2\Sigma^+\) state of the CN radical |

sapt4 | SAPT2+(3) aug-cc-pVDZ computation of the formamide dimer interaction energy, using the aug-cc-pVDZ-JKFIT DF basis for SCF and aug-cc-pVDZ-RI for SAPT. This example uses frozen core as well as MP2 natural orbital approximations. |

sad1 | Test of the superposition of atomic densities (SAD) guess, using a highly distorted water geometry with a cc-pVDZ basis set. This is just a test of the code and the user need only specify guess=sad to the SCF module’s (or global) options in order to use a SAD guess. The test is first performed in C2v symmetry, and then in C1. |

cc21 | ROHF-EOM-CCSD/DZ analytic gradient lowest \(^{2}A_1\) excited state of H2O+ (B1 excitation) |

dfomp2p5-grad2 | DF-OMP2.5 cc-pVDZ gradients for the H2O+ cation. |

cc17 | Single point energies of multiple excited states with EOM-CCSD |

opt14 | 6-31G(d) optimization of SF4 starting from linear bond angle that is not linear in the optimized structure but is in a symmetry plane of the molecule. |

frac | Carbon/UHF Fractionally-Occupied SCF Test Case |

opt8 | Various constrained energy minimizations of HOOH with cc-pvdz RHF. Cartesian-coordinate constrained optimizations of HOOH in Cartesians. |

tu2-ch2-energy | Sample UHF/6-31G** CH2 computation |

fsapt2 | A very quick correctness test of F-SAPT (see fsapt1 for a real example) |

omp3-1 | OMP3 cc-pVDZ energy for the H2O molecule |

cbs-delta-energy | Extrapolated energies with delta correction |

ocepa3 | OCEPA cc-pVDZ energy with ROHF initial guess for the NO radical |

fnocc2 | Test G2 method for H2O |

dfmp2-2 | Density fitted MP2 energy of H2, using density fitted reference and automatic looping over cc-pVDZ and cc-pVTZ basis sets. Results are tabulated using the built in table functions by using the default options and by specifiying the format. |

pywrap-freq-g-sowreap | Finite difference of gradients frequency, run in sow/reap mode. |

fci-tdm-2 | BH-H2+ FCI/cc-pVDZ Transition Dipole Moment |

dft-grad | DF-BP86-D2 cc-pVDZ frozen core gradient of S22 HCN |

ocepa-grad2 | OCEPA cc-pVDZ gradient for the NO radical |

dfmp2-grad4 | DF-MP2 cc-pVDZ gradient for the NO molecule. |

mp2-module | OMP2 cc-pVDZ energy for the H2O molecule. |

ci-multi | BH single points, checking that program can run multiple instances of DETCI in a single input, without an intervening clean() call |

dcft-grad2 | RHF-ODC-12 analytic gradient computations for H2O use AO_BASIS=DISK and AO_BASIS=NONE, respectively. RHF-ODC-06 analytic gradient computations for H2O use AO_BASIS=DISK and AO_BASIS=NONE, respectively. |

pywrap-db1 | Database calculation, so no molecule section in input file. Portions of the full databases, restricted by subset keyword, are computed by sapt0 and dfmp2 methods. |

stability2 | ROHF stability analysis check for CN with cc-pVDZ. This test corresponds to the rohf-stab test from Psi3. |

cc13a | UHF-CCSD(T)/cc-pVDZ \(^{3}B_1\) CH2 geometry optimization via analytic gradients |

cc25 | Single point gradient of 1-2B2 state of H2O+ with EOM-CCSD |

pywrap-checkrun-uhf | This checks that all energy methods can run with a minimal input and set symmetry. |

dfomp3-2 | DF-OMP3 cc-pVDZ energy for the H2O+ cation |

omp3-grad2 | OMP3 cc-pVDZ gradient for the NO radical |

scf7 | Tests SCF gradient in the presence of a dipole field |

ocepa-grad1 | OCEPA cc-pVDZ gradient for the H2O molecule. |

dfccd-grad1 | DF-CCSD cc-pVDZ gradients for the H2O molecule. |

pywrap-checkrun-rohf | This checks that all energy methods can run with a minimal input and set symmetry. |

dfcasscf-fzc-sp | CASSCF/6-31G** energy point |

psimrcc-fd-freq2 | Mk-MRCCSD frequencies. \(^1A_1\) O$_3` state described using the Ms = 0 component of the singlet. Uses TCSCF orbitals. |

opt2-fd | SCF DZ allene geometry optimzation, with Cartesian input |

scf-freq1 | Analytic vs. finite difference DF-SCF frequency test for water. |

psimrcc-ccsd_t-3 | Mk-MRCCSD(T) single point. \(^1A_1\) CH2 state described using the Ms = 0 component of the singlet. Uses RHF singlet orbitals. |

dfmp2-3 | DF-MP2 cc-pVDZ frozen core gradient of benzene, computed at the DF-SCF cc-pVDZ geometry |

cbs-xtpl-freq | Various gradients for a strained helium dimer and water molecule |

fd-freq-energy | SCF STO-3G finite-difference frequencies from energies |

dfomp3-grad1 | DF-OMP3 cc-pVDZ gradients for the H2O molecule. |

scf-guess-read2 | Test if the the guess read in the same basis converges. |

cc24 | Single point gradient of 1-2B1 state of H2O+ with EOM-CCSD |

dfomp2p5-grad1 | DF-OMP2.5 cc-pVDZ gradients for the H2O molecule. |

scf-hess1 | RHF STO-3G (Cartesian) and cc-pVDZ (spherical) water Hessian test, against Psi3 reference values. |

dcft-grad3 | Restricted DF-DCFT ODC-12 gradient for ethylene with cc-pVDZ/cc-pVDZ-RI standard/auxiliary basis set |

pywrap-all | Intercalls among python wrappers- database, cbs, optimize, energy, etc. Though each call below functions individually, running them all in sequence or mixing up the sequence is aspirational at present. Also aspirational is using the intended types of gradients. |

cepa-module | routing check on lccd, lccsd, cepa(0). |

pywrap-opt-sowreap | Finite difference optimization, run in sow/reap mode. |

dfrasscf-sp | 6-31G** H2O Test RASSCF Energy Point will default to only singles and doubles in the active space |

mp2-def2 | Test case for Binding Energy of C4H5N (Pyrrole) with CO2 using MP2/def2-TZVPP |

dfccsdt1 | DF-CCSD(T) cc-pVDZ energy for the H2O molecule. |

nbody-he-cluster | MP2/aug-cc-pv[DT]Z many body energies of an arbitrary Helium complex Size vs cost tradeoff is rough here |