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.
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Shumsky, A.N., Tandura, S.N., Ugrak, B.I. et al. Stereochemical nonrigidity of (O—Ge)-chelate bis[(2-oxo-1-hexahydroazepinyl)methyl]dichlorogermane: substantiation of the dissociative mechanism of chelating ligand exchange. Russian Chemical Bulletin 53, 551–553 (2004). https://doi.org/10.1023/B:RUCB.0000035635.33638.d5
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DOI: https://doi.org/10.1023/B:RUCB.0000035635.33638.d5