八面体取代反应中的探查记忆效应:重排过程的新处理

W. Jackson, Leigh J. McJames, P. Newitt, Kerrina Wells
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引用次数: 0

摘要

用核磁共振和可见光/紫外光谱研究了me2so溶剂中顺式-和反式-[Co(en) 2 (osme2)(n3)] 2+取代me2so的速率和立体反应过程。选择性氘化配合物的异构化、外消旋、溶剂交换和NH置乱实验的报道,提供了八面体取代过程和中间体性质比以前可能的更广泛的画面。结果表明,在标准文本中出现的传统叙述需要进行改造。
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Probing Memory Effects in Octahedral Substitution Reactions: New Handles on Rearrangement Processes
The rates and steric course for the Me 2 SO substitution reactions for cis - and trans -[Co(en) 2 (OSMe 2 )(N 3 )] 2+ in solvent Me 2 SO have been investigated by 1 H NMR and Vis./UV spectroscopy. Isomerisation, racemisation, solvent exchange and NH scrambling experiments for selectively-deuterated complexes are reported which provide a wider picture on the octahedral substitution process and the nature of the intermediates than previously possible. The results show that the traditional accounts appearing in standard texts are in need of revamping.
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