11

C       -0.389334    0.345849    0.000000 
C        0.270631    1.546002    0.642437 
C        0.270631    1.546002   -0.642437 
C        0.270631   -0.975810    0.000000 
C       -0.368279   -2.141046    0.000000 
H       -1.477322    0.294937    0.000000 
H        0.540308    2.004320    1.576127 
H        0.540308    2.004320   -1.576127 
H        1.357028   -0.957393    0.000000 
H       -1.450608   -2.190688    0.000000 
H        0.164600   -3.081473    0.000000 
