11

C       -1.502398    0.491708    0.000000 
C        0.000000    0.422623    0.000000 
C       -0.504298    1.615404    0.000000 
C        1.115336   -0.472395    0.000000 
C        0.979866   -1.800211    0.000000 
H       -2.049528    0.256827    0.911542 
H       -2.049528    0.256827   -0.911542 
H       -0.372885    2.681257    0.000000 
H        2.102714   -0.023598    0.000000 
H       -0.000401   -2.257895    0.000000 
H        1.838596   -2.456194    0.000000 
