METAL-ION COMPLEXES OF 1,4,7-TRIAZACYCLONONANE AND THEIR AMINOALKYL DERIVATIVES - ANALYSIS OF CHELATE RINGS FUSION AND MOLECULAR MECHANICS STUDYстатья
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Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
Аннотация:Stereochemistry of metal ion complexes of 1,4,7-triazacyclononane, their N,N',N''-tris(amino ethyl), tris(aminopropyl), and their N,N'-(4,7-diazadecylene) derivatives is described in terms of the fusion of chelate rings at metal-nitrogen coordination bonds. Molecular mechanics calculations and analysis of the X-ray data confirm that the semi-quantitative analysis is valid and that fusion plays a critical role in the structure of the complexes. Molecular mechanics study of puckering of the ethylenediamine chelate ring, an essential part in this study, is also presented.