Ab initio molecular orbital calculations are performed on the guanidmium ion using the STO-3G and 4-3 1G basis sets. Values for the single. double, and tripte rigid barriers of rotation, aiong with values for the geometry optimized single barrier of rotation are obtained. In addition, molecular orbi
Ab initio study of the rotational energy barrier in carbonylylide
β Scribed by Y. Jean; F. Volatron
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 640 KB
- Volume
- 83
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The rotatxonal energy btier in carbonyIyiide CH~OCH~ IS studied using RHF CI calculations J&pending on the sizi, of the CS and the basis set (STO-3G and 4-31G), values m the iange 13-17 kcal/molare found. At this level of calcuhtion. the rmd-point of the isomenzatzon process can be mainly described by the diradical rather than the zwittesIoa
π SIMILAR VOLUMES
The nature of the rotational barrier in substituted phosphoranes has been investigated by ab initio calculations of P&NH2 using gaussian expansions of Slater orbitals. The conformation with the amino group's lone pair lying in the equatorial plane of the phosphorsne system was favored by 2 1.0 kcall
The heights of the rotational barn-ers of the diselenide bridge in dimethyl diselenide have been calculated at the Hartree-Fock level with the 3-21G basis set. The minimum in the rotational potential energy function occurs at a torsional angle of 85.64". The bam'ers were determined by complete geome
Minimal basis se: SCF calculations have been carried out on 2-furancarboxaldehyde (furfural). The internal-rotation equilibrium in the vapour phase and in various solvents has been investigated with a satisfactory agreement with the experimental results.
## Abstract The calculated result obtained with MM2(87) for the rotation of the isopropyl group in 3βmethylβ1βbutene is not in agreement with experimental data. In order to reparametrize the C~__sp__~2βC~__sp__~3βC~__sp__~βC~__sp__~3 torsional angle, 3βmethylβ1βbutene and 1βbutene have been studied