Abstract
Ab initio molecular orbital theory is used to examine the effect of substituents on bond lengths in mono‐ and disubstituted methanes. The relative importance of electrostatic and orbital interaction terms are assessed. The results suggest that for substituents (X) which show powerful σ effects and weak π interactions (e.g., F), the changes in bond length are due primarily to the electrostatic component except in some disubstituted methanes in which case the change in the hyperconjugative ability of the C—X bond is also important. On the other hand, substituents X which show weak σ effects but powerful π interactions (e.g., NH2) affect bond lengths primarily through hyperconjugative interaction of a filled or vacant π‐type orbital on X with the adjacent bonds.
Original language | English |
---|---|
Pages (from-to) | 295-300 |
Number of pages | 6 |
Journal | Journal of Computational Chemistry |
Volume | 1 |
Issue number | 3 |
DOIs | |
State | Published - 1 Jan 1980 |
Externally published | Yes |
ASJC Scopus subject areas
- Chemistry (all)
- Computational Mathematics