Density functional (DF) calculations have been carried out on the in-plane harmonic frequencies and valence force field of benzene. The calculated force constants are in excellent qualitative agreement with previous scaled ab initio forcefields. Harmonic frequencies are predicted with an average dev
Coupled cluster calculation of the in-plane harmonic force field of benzene
β Scribed by Leonard J. Brenner; Joerg Senekowitsch; Robert E. Wyatt
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 762 KB
- Volume
- 215
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The in-plane harmonic force field for benzene has been calculated at the CCSD level of theory using a large COVTZ basis set (318 functions in 234 contractions). The computed harmonic frequencies deviate on average 2.4% from experimental estimates. Comparison with previous theoretical harmonic frequencies and force tields reveals dependencies on basis set size and methodology.
π SIMILAR VOLUMES
The normal coordinate and force field analysis we have previously undertaken for the in-plane motions of tellurophene and selenophene is completed in this paper with the calculation of the A2 and B2 (A") modes due to the out-of-plane bendings in these molecules. Force and interaction constants and t