A new molecular mechanics MM3 force field has been developed based on various experimental data as well as ab initio calculations. Computergenerated molecular structures and energy values were compared with experimentally determined data. The acyl halides studied were formyl halides, acetyl halides,
Molecular mechanics studies of acyl halides: II. Vibrational spectra
β Scribed by Shim, Joong-Youn; Bowen, J. Phillip
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 221 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0192-8651
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β¦ Synopsis
A newly developed acyl halide molecular mechanics MM3 force field can accurately calculate molecular geometry, usually to within experimental error. The new force field can also calculate vibrational frequencies. The acyl halides studied were formyl halides, acetyl halides, propionyl halides, n-butyryl halides, 2-methylpropionyl halides, and 2,2-dimethylpropionyl halides. The rms deviation for vibrational frequencies was 28 cm y1 .
π SIMILAR VOLUMES
Density functional theory with the combined Becke3-LYP exchangeαcorrelation energy w Ε½ . x Ε½ . functional DFT B3-LYP method using the 6-31G d, p basis set is applied to predict Ε½ . molecular parameters geometries, rotational constants, dipole moments and vibrational Ε½ . IR spectra harmonic wavenumb
Density functional theory with the combined Becke's three-parameter exchange functional in combination with the Lee, Yang, and Parr correlation functional (B3LYP) exchange-correlation energy functions using the 6-31G \* basis set was applied to study the structures and vibrational infrared (IR) spec