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Formation and dissociation mechanism of amide complexes III. Water substitution as the rate limiting factor for the interconversion of Cu2+ complexes with neutral and deprotonated amide groups

✍ Scribed by A. Zuberbühler; Th. Kaden

Publisher
John Wiley and Sons
Year
1972
Tongue
German
Weight
319 KB
Volume
55
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The protonation and deprotonation rates of the coordinated amide group in the Cu~2+~ complexes with N^α^‐(2‐pyridyl‐methyl)‐glycinamide (I) and N^α^‐(2‐pyridyl‐methyl)‐glycineethylamide (II) have been studied by stopped flow techniques. It is shown that the rate determining step of the formation of the complex with the deprotonated amide group is given by the rate of water dissociation from Cu~2+~. Weaker bases than OH^−^ or stronger acids than water can react by a different path, in which the proton transfer and/or the rotation from the O‐co‐ordinated into the N‐co‐ordinated form and vice versa is rate determining.

📜 SIMILAR VOLUMES

Formation and Dissociation Mechanism of
Formation and Dissociation Mechanism of Amide Complexes, IV. Protonation and deprotonation of the Cu2+ and Ni2+ complexes of 3,7-diazanonanediamide and 3,7-diazanonane-N,N′-diethylamide
✍ Andreas D. Zuberbühler; Thomas A. Kaden 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 German ⚖ 365 KB

## Abstract The protonation and deprotonation rates of the coordinated amide groups in the Ni^2+^ and Cu^2+^ complexes of 3,7‐diazanonanediamide (DANA) and in the Cu^2+^ complex of 3,7‐diazanonane‐N,N′‐diethylamide (DANEA) have been studied by stopped‐flow techniques. For the interconversion M(H~−2