Ab initio calculations have been used to characterize the transition states for halogen abstraction by CH 3 in reactions with CF 4 , CF 3 Cl, CF 3 Br, and CF 3 I (1-4). Geometries and frequencies were obtained at the HF/6-31G(d) and levels of theory. En-MP2 ฯญ full/6-31G(d) ergy barriers were compute
A computational study of the reaction of methane with methyl radical
โ Scribed by Richard D. Gilliom
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- English
- Weight
- 372 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0192-8651
No coin nor oath required. For personal study only.
โฆ Synopsis
The activation energy and optimized transition-state geometry for the abstraction of a hydrogen atom from methane by methyl radical have been calculated by the semiempirical methods MIND0/3 and MNDo. These results are compared with other semiempirical and ab initio results. The MINDO/3 method, based upon accuracy of the computed energy of activation, appears to be the computational method of greatest reliability. A method of locating the transition state on semiempirical surfaces is demonstrated.
๐ SIMILAR VOLUMES
High levels of ab initio calculations were performed with the target of exploring the potential-energy surface for the doublet and the quartet nitrogen with methane. There is a considerable difference between these two reaction paths in light of the formation of the reactant complex. Doublet nitroge
## Abstract An overview of the computational efforts made by our group during the last few years in the field of nonheme diiron proteins is presented. Through application of __ab initio__ methodology to a reasonable set of molecular models, significant progress is made in understanding how the solu