PM7 Accuracy

piperazine    614 Piperazine

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    #  Species Formula
   604 1,2-PropanediamineC3H10N2
   605 DicyanoacetyleneC4N2
   606 FumaronitrileC4H2N2
   607 1,3-DiazineC4H4N2
   608 PyrazineC4H4N2
   609 PyridazineC4H4N2
   610 SuccinonitrileC4H4N2
   611 2-Methyl-1H-imidazoleC4H6N2
   612 (Dimethylamino) acetonitrileC4H8N2
   613 1,4,5,6-TetrahydropyrimidineC4H8N2
   614 Piperazine C4H10N2
   615 2-AminopyridineC5H6N2
   616 3-AminopyridineC5H6N2
   617 4-AminopyridineC5H6N2
   618 Dimethyl propanedinitrileC5H6N2
   619 2-Ethyl-1H-imidazoleC5H8N2
   620 DiethylcyanamideC5H10N2
   621 ButylmethyldiazeneC5H12N2
   622 ButylmethyldiazineC5H12N2
   623 N,N-Dimethyl-1,3-propanediamineC5H14N2
   624 2-CyanopyridineC6H4N2


DHf: 6.0 kcal/mol,     REF: NIST Chemistry WebBook, NIST Standard Reference Database, No. 69; W. G. Mallard, P. J. Linstrom, Eds., National Institute of Standards and Technology, Gaithersberg, http://webbook.nist.gov/chemistry.
  
 PM7
Piperazine
 H=6.0 HR=NIST
  N     0.00000000  0    0.0000000  0    0.0000000  0     0     0     0
  C     1.47606684  1    0.0000000  0    0.0000000  0     1     0     0
  C     1.54982618  1  112.6320457  1    0.0000000  0     2     1     0
  N     1.48056298  1  109.2072960  1  -56.2069090  1     3     2     1
  C     1.48085577  1  111.9245964  1   57.3973635  1     4     3     2
  C     1.47620667  1  109.7765869  1   55.2718935  1     1     2     3
  H     1.01859388  1  110.8814246  1 -122.6989713  1     1     2     6
  H     1.11381896  1  107.9144922  1 -121.0277331  1     2     1     3
  H     1.10830511  1  108.9383486  1 -115.9321500  1     2     1     8
  H     1.11119063  1  109.5941022  1 -117.6523607  1     3     2     4
  H     1.10905369  1  110.0469463  1 -117.7898902  1     3     2    10
  H     1.01850892  1  110.5780121  1  123.7004397  1     4     3     5
  H     1.11102581  1  107.5604070  1 -176.4013763  1     5     4     3
  H     1.10879892  1  113.0344597  1 -118.3549954  1     5     4    13
  H     1.10818565  1  108.9367161  1 -178.4721408  1     6     1     2
  H     1.11363148  1  108.0092220  1 -116.0439682  1     6     1    15