The poteniiaI surface for the reaction H,CN+H\* -HCN+H + Hz has been studieu by ab initio SCF calculations, using gaussian-type basis functions. A saddle point on the surface has been found, and a reaction path is proposed to explain the observed reIease tii kinetic energy.
A comparative ab initio study of the H2SiN+ and H2CN+
β Scribed by J.R. Flores; J. Largo-Cabrerizo
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 518 KB
- Volume
- 142
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Ab initio molecular-orbital calculations have been carried out on the H,SiN+ cation (C,,). In contrast with the isovalent H&N+ ion (C,,), a triplet state ('AZ) is the most stable, but the singlet state ('A, ) appears to be a local minimum, even at correlated levels. However, this singlet species isexpected to have a very low barrierto isomerization into HSiNH+. Comparisons are made with other nitrenes and vinylidenes.
π SIMILAR VOLUMES
The energy difference between the HzCN\*-N2 comples and its components, H2CN\* 2nd N2. has been ulculated PS 89 and 6-4 kcal/mol by ab initio SW calculations employing the 4-31G and 6-31G\*\* basis sets. These ~AICS agree with the previously estimated heat of formation of 7.65 kul/mol. The reaction
Ab initio molecular-orbital calculations have been carried out on the low-lying triplet and singlet electronic states of the H&N+ cation, at the SCF and Moller-Plesset levels of theory. Both triplet 'AZ and 3BZ electronic states have similar energies. The barriers to isomerization to the 'A" and 'A'
The reactants, products, and saddle point for the reaction H, + CN 4 H + HCN have been studied by ab initio calculations. The computed structures, frequencies, and energetics are compared directly to available measurements and, indirectly, to experimental rate constants. The theoretical rate constan
The present paper represents the first part of an extensive theoretical study on the electronic spectrum of B 2 H 2 . The results of ab initio calculations of the vertical spectrum and the trans-and cis-bending potential curves for the lowlying triplet and singlet electronic states are reported. Spe