A select group of herbicides that inhibit photosystem I1 also act at the acceptor side of the reaction center (RC) from the photosynthetic bacterium Rhodopseudomonas sphaeroides, with much the same relative specificity as in plants. These include the triazines and some phenolic compounds. The propos
โฆ LIBER โฆ
A simple, self-consistent electrostatic model for quantitative prediction of the activation energies of four-center reactions. II.*
โ Scribed by G. R. Haugen; S. W. Benson
- Publisher
- John Wiley and Sons
- Year
- 1970
- Tongue
- English
- Weight
- 920 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0538-8066
No coin nor oath required. For personal study only.
โฆ Synopsis
A simple electrostatic model of point dipoles is used which permits direct calculation of the activation energies for the addition of the molecules H,O, H,S, H,N, and H,P to olefins. These calculated values agree with the known experimental data to within f 2 kcal/mole on the average. It was found that the best fit could be obtained with a polar transition state that corresponded to a reduction in bond order from 1 to $ for the bond-breaking coordinates and an increase in bond order from 0 to 0.18 for the bond-forming coordinates.
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๐
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โ 1004 KB