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

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

Isomers of CH3Cl3Si

index Species CAS number Name Relative experimental enthalpy (kJ mol-1) sketch
a SiH3CCl3 120434277 (trichloromethyl)silane   sketch of (trichloromethyl)silane
b SiCl3CH3 75796 methyltrichlorosilane 0.0 sketch of methyltrichlorosilane
The calculated enthalpies include the calculated and scaled vibrational zero-point energy.
Methods with predefined basis sets
semi-empirical AM1 488.1 a
0.0 b
PM3 455.3 a
0.0 b
PM6 447.9 a
0.0 b
composite G1 480.7 a
0.0 b
G2MP2 476.8 a
0.0 b
G2 475.2 a
0.0 b
G3 485.3 a
0.0 b
G3B3 481.9 a
0.0 b
G4 485.6 a
0.0 b
CBS-Q 482.8 a
0.0 b

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.