%mem=500MB
%nprocshared=1
%chk=/work/callan/cisbut/cisbutcas.chk
#p opt=conical pop=full CAS(4,4,nroot=2,stateaverage) STO-3G nosymm IOP(10/10=700005) IOP(5/97=100,10/97=100) geom=checkpoint guess=read

cis butadiene CASSCF optimisation with state averaged orbitals, ground state.

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