%chk=\\icfs16.cc.ic.ac.uk\bw08\Desktop\Tues Mod 3\cis buta opt.chk
# opt am1 geom=connectivity

cis buta opt

0 1
 C                 -2.16393442    2.66678055   -1.17497730
 H                 -1.63077067    2.66678055   -2.10268222
 H                 -3.23393442    2.66678055   -1.17497730
 C                 -1.48866011    2.66678055    0.00000000
 H                 -2.02182386    2.66678055    0.92770492
 C                  0.05133989    2.66678055    0.00000000
 H                  0.58450363    2.66678055    0.92770492
 C                  0.73358329    2.66678055   -1.17094448
 H                  0.20594082    2.66678055   -2.10180077
 H                  1.80356440    2.66678055   -1.16458718

 1 2 1.0 3 1.0 4 2.0
 2
 3
 4 5 1.0 6 1.0
 5
 6 7 1.0 8 2.0
 7
 8 9 1.0 10 1.0
 9
 10