Stereochemical nonrigidity of (O—Ge)-chelate bis[(2-oxo-1-hexahydroazepinyl)methyl]dichlorogermane: substantiation of the dissociative mechanism of chelating ligand exchange View Full Text


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Article Info

DATE

2004-03

AUTHORS

A. N. Shumsky, S. N. Tandura, B. I. Ugrak, Vad. V. Negrebetsky, Yu. I. Baukov, S. P. Kolesnikov

ABSTRACT

Stereochemical nonrigidity of the hexacoordinated (O—Ge)-chelate bis(2-oxo-1-hexahydroazepinylmethyl)dichlorogermane in CDCl3 was studied by dynamic NMR. The activation parameters of the intramolecular rearrangement at the coordination center are ΔG#298 = 12.3±0.2 kcal mol–1, ΔH# = 16.9±0.2 kcal mol–1, and ΔS# = 15.3±0.7 cal mol–1 K–1. The dissociative mechanism of ligand exchange involving the cleavage of the O→Ge coordination bond is discussed based on the positive entropy of activation. More... »

PAGES

551-553

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/b:rucb.0000035635.33638.d5

DOI

http://dx.doi.org/10.1023/b:rucb.0000035635.33638.d5

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1005730158


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