8

C     0.750           0.000           0.000
C    -0.750           0.000           0.000
H    -1.050           0.000           0.850
H    -1.050           0.736          -0.425
H    -1.050          -0.736          -0.425
H     1.050           0.000          -0.850
H     1.050           0.736           0.425
H     1.050          -0.736           0.425