NBO-based CI/MP through-space/bond interaction analysis was developed to analyze specific orbital interactions under consideration of the effects of electron correlation. This treatment was applied to the analysis of stereoelectronic effects in SN2 reactions of allyl bromide in which the effects of electron correlation play an important role (ammonia was used as the nucleophilic reagent). The SN2 activation energy in allyl bromide is lower than that in propyl bromide, because both the σ-π* and π-σ* interactions in allyl bromide contribute equally to the stabilization of the transition state.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Physical and Theoretical Chemistry