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A Semi-Empirical Model of the Energy Barrier of Proton Transfer Reactions

โœ Scribed by Alfred V. Willi


Publisher
John Wiley and Sons
Year
1971
Tongue
German
Weight
889 KB
Volume
54
Category
Article
ISSN
0018-019X

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โœฆ Synopsis


In the final structure about half the positive charge is located at the iron atom and the other half distributed uniformly over both rings (see table ). For comparison the charge at the iron atom in ferrocene is calculated to be + 0.3. This result compares favourably with Mossbawer experiments 1131. Another interesting result of these calculations is that a planar structure (111) should have a triplet groundstate (1.4 eV difference between highest occupied and lowest unoccupied MO) 1141 while the bent structure (V) should have a singlet ground state. Some experiments carried out by Cais et al. 1151 may be explained in this wap.

This work is p a r t of project No. SR 2.120.69 of t h e Schweizerzsche Satzolzalfonds. W e wish t o thank thc S A N D O Z AG for computer-time on the U N I V A C 1108. BIBLIOGRAPHY ! l j Reviews: (a) &I.


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## Abstract Proton transfer reactions were studied in all titratable pairs of amino acid side chains where, under physiologically reasonable conditions, one amino acid may function as a donor and the other one as an acceptor. Energy barriers for shifting the proton from donor to acceptor atom were