12
Benzene molecule (C6H6, planar hexagon, D6h symmetry)
C   1.396   0.000   0.000
C   0.698   1.209   0.000
C  -0.698   1.209   0.000
C  -1.396   0.000   0.000
C  -0.698  -1.209   0.000
C   0.698  -1.209   0.000
H   2.479   0.000   0.000
H   1.240   2.148   0.000
H  -1.240   2.148   0.000
H  -2.479   0.000   0.000
H  -1.240  -2.148   0.000
H   1.240  -2.148   0.000
