Accuracy

Ethylenediamine    599 Ethylenediamine

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    #  Species Formula
   589 HydrazineH4N2
   590 BH3-NH3, dimer (Geo)H12B2N2
   591 DiazomethaneCH2N2
   592 N=N-CH2-CH2N2
   593 MethylhydrazineCH6N2
   594 Cyanogen (Geo)C2N2
   595 CyanogenC2N2
   596 Dimethyldiazene (Geo)C2H6N2
   597 1,1-DimethylhydrazineC2H8N2
   598 1,2-DimethylhydrazineC2H8N2
   599 Ethylenediamine C2H8N2
   600 1H-PyrazoleC3H4N2
   601 ImidazoleC3H4N2
   602 1,2-PropanediamineC3H10N2
   603 DicyanoacetyleneC4N2
   604 FumaronitrileC4H2N2
   605 1,3-DiazineC4H4N2
   606 PyrazineC4H4N2
   607 PyridazineC4H4N2
   608 SuccinonitrileC4H4N2
   609 2-Methyl-1H-imidazoleC4H6N2


ΔHf: -4.1 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
Ethylenediamine
 H=-4.1 HR=NIST
  N     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.47321060 +1    0.0000000 +0    0.0000000 +0     1     0     0
  C     1.54903695 +1  114.4754560 +1    0.0000000 +0     2     1     0
  N     1.47284704 +1  114.4730098 +1   75.2625042 +1     3     2     1
  H     1.00524767 +1  112.2570188 +1  -58.4424850 +1     1     2     3
  H     1.00664879 +1  111.9936291 +1  122.6086001 +1     1     2     5
  H     1.11211685 +1  107.9904771 +1  123.4931125 +1     2     1     3
  H     1.11293476 +1  107.8624566 +1  113.8715562 +1     2     1     7
  H     1.11297811 +1  109.8486664 +1  121.6358471 +1     3     2     4
  H     1.11227380 +1  110.4330804 +1  116.2857721 +1     3     2     9
  H     1.00535900 +1  112.2499940 +1  -58.4271159 +1     4     3     2
  H     1.00674096 +1  112.0067190 +1  122.6017924 +1     4     3    11