PM7 Accuracy

4,4'-bipyridine    663 4,4'-Bipyridine

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    #  Species Formula
   653 Di-n-butyldiazeneC8H18N2
   654 Di-tert-butyldiazeneC8H18N2
   655 1,2-DibutylhydrazineC8H20N2
   656 3-QuinolinamineC9H8N2
   657 5-QuinolinamineC9H8N2
   658 6-QuinolinamineC9H8N2
   659 8-QuinolinamineC9H8N2
   660 2-(Diethylamino)-pentanenitrileC9H18N2
   661 2,2-BipyridylC10H8N2
   662 2,4-BipyridylC10H8N2
   663 4,4'-Bipyridine C10H8N2
   664 2,3-Dimethyl quinoxalineC10H10N2
   665 alpha N,N-dimethylamino phenylacetonitrileC10H12N2
   666 Ethyl(1,1-dimethylpropyl)malonodinitrileC10H16N2
   667 Meso-2,3-diethyl-2,3-dimethylsuccinodinitrileC10H16N2
   668 Methyl(1,1,2-trimethylpropyl)malonodinitrileC10H16N2
   669 PhenazineC12H8N2
   670 PhenazoneC12H8N2
   671 cis-AzobenzeneC12H10N2
   672 Diphenyl diazeneC12H10N2
   673 4,4'-Dimethyl-2,2'-bipyridineC12H12N2


DHf: 70.1 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
4,4'-Bipyridine
 H=70.05 HR=NIST
  N     0.00000000  0    0.0000000  0    0.0000000  0     0     0     0
  C     1.34591328  1    0.0000000  0    0.0000000  0     1     0     0
  C     1.40047901  1  122.6476886  1    0.0000000  0     2     1     0
  C     1.39615457  1  118.3742709  1   -0.3046409  1     3     2     1
  C     1.39641084  1  119.3495395  1    0.1733313  1     4     3     2
  C     1.34611008  1  118.6031069  1    0.1514991  1     1     2     3
  C     1.46839207  1  120.3481304  1 -179.9671795  1     4     3     5
  C     1.39623667  1  120.3236557  1  118.5675389  1     7     4     3
  C     1.40046492  1  118.3519649  1 -179.9091495  1     8     7     4
  N     1.34586683  1  122.6918052  1   -0.2379389  1     9     8     7
  C     1.34607590  1  118.5650650  1    0.1570096  1    10     9     8
  C     1.40037578  1  122.6709508  1    0.0960360  1    11    10     9
  H     1.09656288  1  115.7317451  1  179.9558080  1     2     1     3
  H     1.08646131  1  120.6877316  1 -179.6342331  1     3     2     4
  H     1.09658680  1  115.7324166  1 -179.8783105  1     6     1     2
  H     1.09662841  1  121.5429663  1 -179.9770794  1     9     8    10
  H     1.09663979  1  115.7206048  1  179.9839337  1    11    10    12
  H     1.08647546  1  120.6984612  1 -179.8970255  1    12    11    10
  H     1.08647665  1  120.9093803  1  179.7653978  1     5     4     3
  H     1.08637804  1  120.9288237  1  179.6828045  1     8     7     9