6

C        0.000000    0.000000    0.667100 
C        0.000000    0.000000   -0.667100 
H        0.000000    0.923404   -1.231634 
H        0.000000   -0.923404   -1.231634 
H        0.000000    0.923404    1.231634 
H        0.000000   -0.923404    1.231634 
