Accuracy

sodium cyanide, dimer   1707 Sodium cyanide, dimer

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    #  Species Formula
  1697 Na(+)(H2O)6H12O6Na
  1698 Na(+)(H2O)6 (Geo)H12O6Na
  1699 Nonactin-sodium thiocyanate (NONACS) (Geo)C40H64O12Na
  1700 Sodium fluoride (NaF) (Geo)FNa
  1701 Sodium fluorideFNa
  1702 Neon sodium cation (Geo)NeNa
  1703 Sodium dimer, cationNa2
  1704 Sodium, dimer (Geo)Na2
  1705 Sodium, dimerNa2
  1706 Disodium acetylide (Geo)C2Na2
  1707 Sodium cyanide, dimer C2N2Na2
  1708 Disodium oxideONa2
  1709 Sodium oxide, Na2O (Geo)ONa2
  1710 Sodium hydroxide, dimerH2O2Na2
  1711 Disodium fluoride, cationFNa2
  1712 Sodium fluoride, dimer (Geo)F2Na2
  1713 Sodium fluoride, dimerF2Na2
  1714 Magnesium, dicationMg
  1715 Magnesium, cationMg
  1716 Magnesium, 1P(u) 3s(1)3p(1)Mg
  1717 Magnesium, atomMg


ΔHf: -2.1 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
Sodium cyanide, dimer
 H=-2.1 HR=NIST
 Na     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     2.17158229 +1    0.0000000 +0    0.0000000 +0     1     0     0
  N     1.16966126 +1  179.9951133 +1    0.0000000 +0     2     1     0
 Na     2.58173864 +1  123.1794057 +1 -177.5591534 +1     2     1     3
  C     2.19438697 +1   66.3943559 +1    0.0060994 +1     4     2     1
  N     1.16800221 +1  148.4693572 +1   -0.0268645 +1     5     4     2