Reactivity studies of (η⁶-<i>p</i>-cymene)ruthenium complexes with 4,4ʹ -bipyridine and imidazole ligands

Abstract

Reactions of [(η⁶-<i>p</i>-cymene)RuCl₂]₂, (<b>a</b>), [(η⁶-<i>p</i>-cymene) Ru(EPh₃)Cl₂] {E = P (<b>b</b>) or As (<b>c</b>)} with 4,4ʹ-bipyridine yielded bridged complexes of the type [(η⁶-<i>p</i>-cymene)RuCl₂-μ-4,4ʹ-bipy-Cl₂Ru(η⁶-<i>p</i>-cymene)] (<b>1</b>) and [(η⁶-<i>p</i>-cymene) Ru(EPh₃)- μ-4,4ʹ-bipy -Cl(EPh₃)Ru(η⁶-<i>p</i>-cymene)] {E=P, (<b>2</b>); As, (<b>3</b>)} respectively. Complex (<b>b</b>) with imidazole in the presence of NaBF₄ in methanol gave compound of the type [(η⁶-<i>p</i>-cymene) Ru(PPh₃)(im)Cl] BF₄ (<b>4</b>) (im = imidazole). These complexes have been characterized with various spectroscopic techniques.