MCSCF

Performs RHF/UHF/ROHF/TCSCF and more general MCSCF computations. Called as the starting point for multireference coupled cluster computations.

General

CANONICALIZE_ACTIVE_FAVG

Do canonicalize the active orbitals such that the average Fock matrix is diagonal?

CANONICALIZE_INACTIVE_FAVG

Do canonicalize the inactive (DOCC and Virtual) orbitals such that the average Fock matrix is diagonal?

CI_DIIS

Do use DIIS extrapolation to accelerate convergence of the CI coefficients?

DIIS

Do use DIIS extrapolation to accelerate convergence of the SCF energy (MO coefficients only)?

DIIS_MAX_VECS

Maximum number of error vectors stored for DIIS extrapolation

  • Type: integer

  • Default: 7

DOCC

The number of doubly occupied orbitals, per irrep

  • Type: array

  • Default: No Default

D_CONVERGENCE

Convergence criterion for density, as measured by the orbital gradient.

E_CONVERGENCE

Convergence criterion for energy.

FAVG

Do use the average Fock matrix during the SCF optimization?

FAVG_START

Iteration at which to begin using the averaged Fock matrix

  • Type: integer

  • Default: 5

FOLLOW_ROOT

Which solution of the SCF equations to find, where 1 is the SCF ground state

  • Type: integer

  • Default: 1

FORCE_TWOCON

Do attempt to force a two configuration solution by starting with CI coefficents of \(\pm \sqrt{\frac{1}{2}}\) ?

INTERNAL_ROTATIONS

Do consider internal rotations?

LEVEL_SHIFT

Level shift to aid convergence

  • Type: double

  • Default: 0.0

MAXITER

Maximum number of iterations

  • Type: integer

  • Default: 100

MO_READ

Do read in from file the MOs from a previous computation?

REFERENCE

Reference wavefunction type

  • Type: string

  • Possible Values: RHF, ROHF, UHF, TWOCON, MCSCF, GENERAL

  • Default: RHF

SOCC

The number of singly occupied orbitals, per irrep

  • Type: array

  • Default: No Default

TURN_ON_ACTV

  • Type: integer

  • Default: 0

WFN_SYM

The symmetry of the SCF wavefunction.

  • Type: string

  • Default: 1

Expert

ROTATE_MO_ANGLE

For orbital rotations after convergence, the angle (in degrees) by which to rotate.

  • Type: double

  • Default: 0.0

ROTATE_MO_IRREP

For orbital rotations after convergence, irrep (1-based, Cotton order) of the orbitals to rotate.

  • Type: integer

  • Default: 1

ROTATE_MO_P

For orbital rotations after convergence, number of the first orbital (1-based) to rotate.

  • Type: integer

  • Default: 1

ROTATE_MO_Q

For orbital rotations after convergence, number of the second orbital (1-based) to rotate.

  • Type: integer

  • Default: 2