## Abstract Self‐consistent perturbation calculations within the INDO framework are reported for 63 ^15^N^13^C coupling constants. Examples are presented for which each of the contact, orbital and dipolar terms provides the dominant contribution to the observed coupling constant. In general, good
Some self-consistent perturbation calculations of 1J(CC)
✍ Scribed by Tun Khin; G. A. Webb
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- English
- Weight
- 300 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
Self‐consistent perturbation calculations of 70 ^1^J(CC) values are reported within the INDO framework. A least‐squares agreement between the calculated and observed couplings, for a variety of bond multiplicities, provides values of 13.503 au^−6^ and 5.072 au^−6^ for (S~C~^2^(O))^2^ and 〈r^−3^〉~C~^2^, respectively. The non‐contact terms are found to be important in cases of multiple bonding.
📜 SIMILAR VOLUMES
## Abstract Some calculations of ^1^__J__(SiC) and ^1^__J__(SiF) are performed by self‐consistent perturbation theory employing standard INDO parameters. ^1^__J__(SiC) is dominated by the contact interaction, whereas the opposite sign for ^1^__J__(SiF) is due to a large orbital interaction. The ^1^
## Abstract Self consistent perturbation theory calculations of ^1^__J__(PN) are performed using INDO parameters. The change in sign of the coupling upon passing from tri‐ to penta‐valent phosphorus arises from the influence of the phosphorus lone‐pair electrons. The observed coupling trends are re
## Abstract One bond ^13^C,^13^C coupling constants have been calculated for some methylcycloalkanes, as well as for 2‐methylbutane, using the self‐consistent perturbation theory as formulated by Blizzard and Santry at the INDO (intermediate neglect of differential overlap) level of approximation.
## Abstract Standard INDO parameters are used in ‘sum‐over‐states’ perturbation calculations of ^n^__J__(NC) in a variety of molecular environments. Good agreement with the experimental data is, in general, obtained when the integral products __S__~N~^2^(o)__S__~C~^2^(o) and 〈__r__^−3^〉~N~〈__r__^−3