Success of the PCILO method and failure of the CNDO/2 method for predicting conformations in some conjugated systems
β Scribed by David Perahia; Alberte Pullman
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 268 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0009-2614
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π SIMILAR VOLUMES
Results from the literature show that the CND0/2 method fails to represent adequately the conformational properties of the molecules &A-BH,, and their substituted derivatives, when both atoms A and B bezr one or two lone pairs. This % in contradicticn with the cIaim that the CNDO/2 method isg~rrcral
The potential functions for the rotation about the essential single bonds in some conjugated compowds as nitrobenzene, nitrosobwwene, benzoic acid, benzamide, acrolein, furfural and phenol have been calculated using the NDDO formalism. Contrary to the known results of the &DOf2 method, the preferred