am1 force thermo rot=2
chlorobenzene
                                                                                
  C    0.000000  0    0.000000  0    0.000000  0    0   0   0
  C    1.396881  1    0.000000  0    0.000000  0    1   0   0
  C    1.396561  1  120.078430  1    0.000000  0    2   1   0
  C    1.396576  1  119.989258  1    0.000000  1    3   2   1
  C    1.396881  1  120.078430  1    0.000000  1    4   3   2
  C    1.397461  1  119.847626  1    0.000000  1    1   2   3
 Cl    1.724991  1  119.921066  1  180.000000  1    6   1   2
  H    1.102234  1  119.394760  1  180.000000  1    1   2   3
  H    1.102158  1  119.982269  1  180.000000  1    2   1   6
  H    1.102112  1  120.004990  1  180.000000  1    3   2   1
  H    1.102158  1  119.940308  1  180.000000  1    4   3   2
  H    1.102219  1  119.394760  1  180.000000  1    5   4   3