HMB and Cp* ruthenium(II) complexes containing bis- and tris-(mercaptomethimazolyl)borate ligands: synthetic, X-ray structural and electrochemical studies (HMB = η 6 -C 6 Me 6 , Cp* = η 5 -C 5 Me 5 )

Abstract

The reactions of [(HMB)RuCl2]2 with K[HB(mt) 3] and Na[H2B(mt)2] (mt = N-methyl-2- mercaptoimidazol-1-yl) led to the isolation of [(HMB)Ru{HB(mt)3}]Cl (1) (ca. 66% yield) and [(HMB)Ru{H2B(mt)2}]Cl (2) (ca. 70% yield), respectively. The reaction of [Cp*RuOMe]2 with Na[H2B(mt)2] yielded Cp*Ru[H2B(mt) 2] (3) (ca. 85% yield). Single crystal X-ray diffraction analyses were carried out on all three complexes, together with cyclic voltammetric measurements.