PM7 Accuracy

piperidine    501 Piperidine

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    #  Species Formula
   491 N-ButylamineC4H11N
   492 t-ButylamineC4H11N
   493 Pyridine (Geo)C5H5N
   494 PyridineC5H5N
   495 N-Methyl pyrroleC5H7N
   496 1,2,3,6-TetrahydropyridineC5H9N
   497 2-CyanobutaneC5H9N
   498 Butyl cyanideC5H9N
   499 t-ButylnitrileC5H9N
   500 CyclopentylamineC5H11N
   501 Piperidine C5H11N
   502 N-Methyl-n-butylamineC5H13N
   503 1-CyclopentenecarbonitrileC6H7N
   504 2-CyclopentenecarbonitrileC6H7N
   505 2-Methyl pyridineC6H7N
   506 3-Methyl pyridineC6H7N
   507 4-Methyl pyridineC6H7N
   508 AnilineC6H7N
   509 2,5-Dimethyl-1H-pyrroleC6H9N
   510 CyclopentanecarbonitrileC6H9N
   511 2-MethylpiperidineC6H13N


DHf: -11.3 kcal/mol,     REF: Assessment of Gaussian-3 and Density Functional Theories for a Larger Test Set" L. A. Curtiss, K. Raghavachari, P. C. Redfern, and J. A. Pople, Journal of Chemical Physics, 112, 7374 (2000).
  
 PM7
Piperidine
 H=-11.3 HR=G3-99
  C     0.00000000  0    0.0000000  0    0.0000000  0     0     0     0
  C     1.54220571  1    0.0000000  0    0.0000000  0     1     0     0
  C     1.53398749  1  110.1121453  1    0.0000000  0     2     1     0
  C     1.53396407  1  110.8754133  1  -53.8297913  1     3     2     1
  C     1.54220892  1  110.2732231  1   53.6483981  1     4     3     2
  N     1.47745902  1  113.1386406  1  -55.1145140  1     5     4     3
  H     1.11204009  1  110.1726911  1  -65.4818395  1     1     2     3
  H     1.11037198  1  110.5944686  1 -117.5063898  1     1     2     7
  H     1.10460545  1  110.0381117  1 -121.5833911  1     2     1     3
  H     1.10386242  1  110.0622054  1 -116.5177893  1     2     1     9
  H     1.10530149  1  110.1307351  1 -122.1983645  1     3     2     4
  H     1.10683241  1  109.7735542  1 -116.2754665  1     3     2    11
  H     1.10474355  1  110.0444985  1 -121.5954814  1     4     3     5
  H     1.10396392  1  110.3138846  1 -116.6320358  1     4     3    13
  H     1.11047795  1  110.6364670  1 -121.6019026  1     5     4     6
  H     1.11226303  1  110.0648859  1 -117.4701502  1     5     4    15
  H     1.01903517  1  110.4741944  1  -66.6442814  1     6     5     4