8
Ethane molecule
C        0.0000    0.0000    0.0000
C        1.5400    0.0000    0.0000
H       -0.5400   -0.9350    0.0000
H       -0.5400    0.4675    0.8736
H       -0.5400    0.4675   -0.8736
H        2.0800    0.9350    0.0000
H        2.0800   -0.4675    0.8736
H        2.0800   -0.4675   -0.8736
