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Relative enthalpies of isomers - Comparison of 0K enthalpies (kJ mol-1)

Isomers of C6H12O

17 10 10 15 39
index Species CAS number Name Relative experimental enthalpy (kJ mol-1) sketch
a C6H12O 66251 hexanal   sketch of hexanal
b C6H12O 592905 Oxepane   sketch of Oxepane
The calculated enthalpies include the calculated and scaled vibrational zero-point energy.
Methods with predefined basis sets

Methods with standard basis sets
6-311+G(3df,2p)
density functional B97D3 0.0 a
49.3 b
6-311+G(3df,2p)

Methods with effective core potentials (select basis sets)
CEP-31G CEP-31G* CEP-121G CEP-121G* LANL2DZ SDD cc-pVTZ-PP aug-cc-pVTZ-PP Def2TZVPP
hartree fock HF                 0.0 a
55.6 b
density functional B3LYP                 0.0 a
49.7 b
PBEPBE                 0.0 a
40.0 b
Moller Plesset perturbation MP2                 0.0 a
30.1 b
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 Calculated; Vibrations; Scale Factors; Scale factors to list vibrational scaling factors.
See section Calculated; Vibrations; Scale Factors; Calculate a scale factor to calculate a vibrational scaling factor for a given set of molecules.