The rearrangement of the 1-methylcyclohexyl cation to the 1,2-dimethylcyclopentyl cation has been studied by MIND0/3 calculations, as an application of the branching mechanism model for cycloalkanes. Possible intermediates and transition states have been characterized by diagonalization of their Hes
MINDO/2 calculation of the rearrangement of singlet ethylcarbene
β Scribed by Margarita Martin; Vicente Menendez; Juan M. Figuera
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 407 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The minimum energy paths for the isomerization of singlet ethylcarbene to propylene and cyclopropane have been calculated by MINDO/Z. The formation of the olefin presents no energy barrier but a critical energy of 1.4 kcal mol-' was found in the path to cyclopropane formation.
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The total energy and the conformationol hypetsutfacc of the lowest singlet and triplet states of sðylene, C.!2SiH2 have been studied using ab initio SCF MO calculations with unrestricted and restricted Hartree-Fock methods, A minimal and an extended basis set was employed. The ground state is pre
Heats of formation, atomic charges, and geometries of some 110 structures involving substituted singlet and triplet phenyl and 4,4-dimethyl-l,4-dihydronaphthalene carbenes and the corresponding diazomethanes were calculated by MIND0/3, MNDO, AM1, and PM3 semiempirical molecular orbital methods. The
## Abstract The calculation of some carbon and nitrogen screening constants and chemical shifts is reported. The independent electron theory developed by Pople is used as the basis of the calculations. Within this framework the MINDO/3 parameterization scheme is employed and shown to provide quanti