Title
The nonpolar resonance effects and the non-Hammett behaviors.
Abstract
In the study we tried to unify the observed non-Hammett behaviors in various fields by proposing the nonpolar resonance effect. This effect was shown to be important not only for carbon radicals but also for some closed-shell systems. Therefore, the odd electron or spin is not the essential cause of the effect. The real origin of the non-Hammett effect should be the HOMOreaction-center-LUMOacceptor and LUMOreaction-center- HOMOdonor, interactions. This means that the nonpolar resonance effect is a universal effect However, we found that the nonpolar resonance effect could not be well exhibited in many systems because of the serious competition from the polar Hammett effect. Finally, we showed that our proposal of the nonpolar resonance effect was valuable from a practical point of view, because using it we could perform much better correlation studies on some "tough" problems such as radical and multiple bond stabilities, UV and IR spectra, and molecular structures.
Year
DOI
Venue
2002
10.1021/ci020020f
JOURNAL OF CHEMICAL INFORMATION AND COMPUTER SCIENCES
DocType
Volume
Issue
Journal
42
5
ISSN
Citations 
PageRank 
0095-2338
0
0.34
References 
Authors
2
5
Name
Order
Citations
PageRank
Lei Liu1113.42
Yu-Hui Cheng200.34
Yao Fu331.33
Rong Chen401.01
Qing-xiang Guo582.70