Complexes of the platinum metals. Part 38. The synthesis and X-ray crystal structure of an asymmetric binuclear ruthenium(I,I) di-p-tolyltriazenido complex [Ru2(µ-RNNNR)(RNNNR)(µ-CO)2(CO)2(bipy)](R =p-tolyl, bipy = 2,2′-bipyridyl)

Abstract

The binuclear ruthenium(I, I) triazenido complex [Ru2(RNNNR)2(CO)6](R =p-tolyl) reacts with excess of 2,2′-bipyridyl (bipy) to afford a substitution product [Ru2(RNNNR)2(CO)4(bipy)] which has been shown by X-ray diffraction methods to contain a pair of non-equivalent ruthenium atoms linked by a metal–metal bond (2.706Å) and bridged by a 1,3-di-p-tolyltriazenide ligand and a pair of carbonyls. The co-ordination sphere of the first ruthenium atom is completed by a chelate triazenide ligand and a terminal carbonyl, that of the second ruthenium atom by a chelate bipy ligand and a terminal carbonyl.