A bond and group equivalent scheme that allows the calculation of heats of formation for carboxylic acids and esters from ab initio 6-31G\* energies has been developed. For a group of 16 compounds, the rms error for the calculated heats of formation was 0.64 kcalimol. Heats of formation have been pr
Heats of formation of organic molecules by ab initio methods: Thiaalkanes
β Scribed by Norman L. Allinger; Linrong Yang; Ioan Motoc; Charles Bender; Jan K. Labanowski
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 330 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1042-7163
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β¦ Synopsis
The bond energy scheme for calculating heats of formation o f organic molecules from ab initio data (6-31G*) has been extended to include 24 compounds containing sulfur in the sulfide oxidation state. The m s deviation from the experimental values for these compounds is 0.54 kcallmol, which is approximately experimental error.
π SIMILAR VOLUMES
## Abstract A bond and group equivalent scheme that allows the calculation of heats of formation of alkenes from __ab initio__ 6β31G\* energies has been developed. For a group of 26 compounds, the root mean square (rms) error for the calculated heat of formation was 0.78 kcal/mol. Heats of formatio
The heats of formation of the trifluoromethanol (CFrOH) and carbonic difluoride (CFrO) molecules are calculated with theoretical methods of demonstrated high accuracy. The results are used to assess the accuracy of the reported value of the heat of formation of CF,O and to provide an accurate estima
Heats of formation of alkanes have been calculated with an accuracy of better than 0.36 kcalrmol by using the total energy calculated by density functional theory, plus bond and group equivalents and statistical mechanical corrections. The necessary equivalents were assigned to bonds and groups in m