Name

SINGLET — RHF singlet state required.

Synopsis

 SINGLET 

Description

Constrains the spin multiplicity of the primary CI eigenstate to be 1, i.e., a singlet, corresponding to no unpaired electrons. For ROOT=n, the nthe lowest-energy singlet CI eigenstate will be the primary eigenstate.

Abbreviation:

SING

Requires:

none

Default value:

none

See also:

DOUBLET, TRIPLET, C.I., ROOT=n, openn,m