Note

This website is presently under development. The primary website for MOPAC is still http://openmopac.net until the majority of its contents have been migrated here.

BIRADICAL

Targets a biradical singlet spin state within the HOMO-LUMO active space of an RHF calculation, which is a synonym for MS=0 and OPEN(2,2). See the MS and OPEN keywords for more information.