6

C  0.0000  0.6669  0.0000
C  0.0000 -0.6669  0.0000
H  0.0000  1.2295  0.9223
H  0.0000 -1.2295  0.9223
H  0.0000  1.2295 -0.9223
H  0.0000 -1.2295 -0.9223