12
 
C          0.75032        1.27504        1.97486
C          0.13724       -0.04690        1.51357
N          0.04150       -0.07174        0.00298
H          0.99992       -0.07219       -0.37700
H         -0.44148       -0.90876       -0.35605
H         -0.43814        0.75810       -0.37747
H         -0.86150       -0.21868        1.93185
H          0.79098       -0.88872        1.76824
H          0.87568        1.25869        3.06407
H          1.73106        1.41048        1.50285
H          0.10247        2.12651        1.72128
Cl         2.79482       -0.08814       -0.72991
