A theoretical approach to substituent effects.Interactions between directly bonded groups in the neutrals XNH2, XOH, and XF and the anions XNH−and XO−
作者:
Alan L. Hinde,
Addy Pross,
Leo Radom,
期刊:
Journal of Computational Chemistry
(WILEY Available online 1980)
卷期:
Volume 1,
issue 2
页码: 118-128
ISSN:0192-8651
年代: 1980
DOI:10.1002/jcc.540010203
出版商: John Wiley&Sons, Inc.
数据来源: WILEY
摘要:
AbstractAb initiomolecular orbital calculations have been carried out for the neutrals XNH2, XOH, and XF and the anions XNH−and XO−with substituents X = Li, BeH, BH2, CH3, NH2, OH, and F. All structures have been fully optimized with the 4‐31G basis set which is found to perform considerably better than the minimal STO‐3G basis in predicting the lengths of strongly polar bonds. A quantitative analysis of interactions between the directly bonded groups, utilizing energy changes in hydrogenation reactions, is presented and rationalized with the aid of perturbation molecular orbital theory. Favorable interactions occur when electron‐donor groups bond to electron‐acceptor groups. This applies to both σ and π interactions, the relative importance of which depends on the
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