Issue 11, 2004

The synthesis and structure of heteroleptic tris(diimine)ruthenium(ii) complexes

Abstract

The reactions of bidentate diimine ligands (L2) with cationic bis(diimine) [Ru(L)(L1)(CO)Cl]+ complexes (L, L1, L2 are dissimilar diimine ligands), in the presence of trimethylamine-N-oxide (Me3NO) as a decarbonylation reagent, lead to the formation of heteroleptic tris(diimine) ruthenium(II) complexes, [Ru(L)(L1)(L2)]2+. Typically isolated as hexafluorophosphate or perchlorate salts, these complexes were characterised by UV-visible, infrared and mass spectroscopy, cyclic voltammetry, microanalyses and NMR spectroscopy. Single crystal X-ray studies have elucidated the structures of K[Ru(bpy)(phen)(4,4′-Me2bpy)](PF6)3·½H2O, [Ru(bpy)(5,6-Me2phen)(Hdpa)](ClO4)2, [Ru(bpy)(phen)(5,6-Me2phen)](ClO4)2, [Ru(bpy)(5,6′-Me2phen)(4,4′-Me2bpy)](PF6)2·EtOH, [Ru(4,4′-Me2bpy)(phen)(Hdpa)](PF6)2·MeOH and [Ru(bpy)(4,4′-Me2bpy)(Hdpa)](ClO4)2·½Hdpa (where Hdpa is di(2-pyridyl)amine). A novel feature of the first complex is the presence of a dinuclear anionic adduct, [K2(PF6)6]4−, in which the two potassium centres are bridged by two fluorides from different hexafluorophosphate ions forming a K2F2 bridging unit and by two KFPFK bridging moieties.

Graphical abstract: The synthesis and structure of heteroleptic tris(diimine)ruthenium(ii) complexes

Supplementary files

Article information

Article type
Paper
Submitted
05 Feb 2004
Accepted
02 Apr 2004
First published
07 May 2004

Dalton Trans., 2004, 1766-1774

The synthesis and structure of heteroleptic tris(diimine)ruthenium(II) complexes

C. M. Kepert, A. M. Bond, G. B. Deacon, L. Spiccia, B. W. Skelton and A. H. White, Dalton Trans., 2004, 1766 DOI: 10.1039/B401761G

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