9 
This geometry optimized by G92;  MP2/6-31G*
H         -2.0801425360     0.4329727646     0.0722817289
C         -1.2129704155    -0.2295285634    -0.0097156258
H         -1.2655910941    -0.9539857247     0.8097953440
C          0.0849758188     0.5590385475     0.0510545434
O          1.2322305822    -0.2731895077    -0.1276123902
H          0.1506137362     1.1200249874     0.9943015309
H          1.2473876659    -0.8998737590     0.6150681570
H          0.1316093068     1.2841805400    -0.7645223601
H         -1.2737541560    -0.7748626513    -0.9540587845
