Issue 32, 2010
From the journal:

Dalton Transactions

Fluxionality and lability in rhenium 4′-hydroxyterpyridine complexes: Evidence for an associative mechanism and correlated fluxionality and lability†

Vanesa Fernández-Moreira,‡a   Flora L. Thorp-Greenwood,‡a   Richard J. Arthur,a   Benson M. Kariuki,a   Robert L. Jenkinsa  and  Michael P. Coogan*a  

* Corresponding authors

a Mike Coogan, Chemistry Department, Cardiff University, Cardiff, UK
E-mail: cooganmp@cf.ac.uk
Fax: 02920874030
Tel: 02920874066

Abstract

The complexes [ReX(CO)3(N,N-η2-4′-hydroxy-2-2′,6′-2′′-terpyridine)] (X = Cl,Br,I) have been synthesised and their ligand exchange reactions and fluxionality of the terpyridine unit studied. The halides are far more labile in these species than in analogous bipyridines, and it is proposed that the ligand fluxionality is involved in this reactivity. Structural studies of the family are reported along with spectroscopic studies including variable temperature NMR which is used to demonstrate a negative entropy of activation for the fluxional process. Synthesis of an analogue which is incapable of fluxional behaviour confirms the link between fluxionality and lability in these complexes.

Graphical abstract: Fluxionality and lability in rhenium 4′-hydroxyterpyridine complexes: Evidence for an associative mechanism and correlated fluxionality and lability

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Article information

DOI
https://doi.org/10.1039/C0DT00022A
Article type
Paper
Submitted
24 Feb 2010
Accepted
14 May 2010
First published
13 Jul 2010

Dalton Trans., 2010,39, 7493-7503

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Fluxionality and lability in rhenium 4′-hydroxyterpyridine complexes: Evidence for an associative mechanism and correlated fluxionality and lability

V. Fernández-Moreira, F. L. Thorp-Greenwood, R. J. Arthur, B. M. Kariuki, R. L. Jenkins and M. P. Coogan, Dalton Trans., 2010, 39, 7493 DOI: 10.1039/C0DT00022A

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