Electrochemical reductive deprotonation of an imidazole ligand in a bipyridine tricarbonyl rhenium(I) complex

Zeng, Q., Messaoudani, M., Vlček, Jr., A. and Hartl, F. ORCID: https://orcid.org/0000-0002-7013-5360 (2012) Electrochemical reductive deprotonation of an imidazole ligand in a bipyridine tricarbonyl rhenium(I) complex. European Journal of Inorganic Chemistry, 2012 (3). pp. 471-474. ISSN 1099-0682 doi: 10.1002/ejic.201101100 (Special issue: Coopertive & redox non-innocent ligands in directing organometallic reactivity (cluster issue))

Abstract/Summary

The reduction path of the complex fac-[ReΙ(imH)(CO)3(bpy)]+ was studied in situ by UV-Vis-NIR-IR spectroelectrochemistry within an OTTLE cell. The complex undergoes 1e‒ reduction of the 2,2'-bipyridine (bpy) ligand and intramolecular electron transfer resulting in the conversion of the axial imidazole (imH) ligand to 3-imidazolate (3-im–). This step is followed by two bpy-based 1e– reductions producing ultimately the five-coordinate complex [Re(CO)3(bpy)]‒ and free 3-im‒. The identity of the reduction product fac-[Re(3-im–)(CO)3(bpy)] has been proven by partial chemical deprotonation of the parent complex followed by IR spectroelectrochemistry. This is the first time when an electrochemical conversion of metal-coordinated imidazole to terminal 3-imidazolate has been observed.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/30625
Item Type	Article
Refereed	Yes
Divisions	Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Publisher	Wiley
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