%mem=500MB
%nprocshared=1
%chk=/work/callan/cisbut/cisbut-hf.chk
#p HF/sto-3g opt

butadiene optimisation

0 1
 C                  0.77000000   -0.00000000   -0.62594007
 C                 -0.77000000   -0.00000000   -0.62594007
 C                 -1.44760000    0.00000000    0.54769756
 C                  1.44760000    0.00000000    0.54769756
 H                 -1.30500000    0.00000000   -1.55258725
 H                 -2.51760000    0.00000000    0.54769756
 H                  0.91260000   -0.00000000    1.47434474
 H                 -0.91260000   -0.00000000    1.47434474
 H                  1.30500000    0.00000000   -1.55258725
 H                  2.51760000    0.00000000    0.54769756