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IV.A.4. (XIV.F.)

Relative enthalpies of isomers - Comparison of 298.15K enthalpies (kJ mol-1)

Isomers of CH2N

index Species CAS number Name Relative experimental enthalpy (kJ mol-1) sketch
a H2CN 9000286 H2CN   sketch of H2CN
b CNH2 9000317 CNH2   sketch of CNH2
c HCNH 54980119 HCNH   sketch of HCNH
The calculated enthalpies include the calculated and scaled vibrational zero-point energy.
Methods with predefined basis sets
semi-empirical AM1 282.9 a
373.0 b
339.2 c
PM3 269.5 a
406.2 b
343.8 c
PM6 307.8 a
397.4 b
263.5 c
composite G1 NC
NC
NC
G2MP2 NC
NC
NC
G2 NC
NC
NC
G3 NC
NC
NC
G3B3 NC
NC
NC
G4 NC
NC
NC
CBS-Q NC
NC
NC

Methods with standard basis sets
NC = not calculated
For descriptions of the methods (AM1, HF, MP2, ...) and basis sets (3-21G, 3-21G*, 6-31G, ...) see the glossary in section I.C. Predefined means the basis set used is determined by the method.
gaw refers to the group additivity method implemeted in the NIST Chemistry Webbook.

See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.