A Cyclometallated (Azobenzene)palladium(II) complex of 1,4,7- trithiacyclononane: Synthesis and reactivity with thioether-dithiolate metalloligands, single-crystal X-ray diffraction analyses and electrochemical studies

Abstract

The treatment of [jPd(C6H4N=NC6H 5)(μ-Cl)j2](5) with AgPF6/NH 4PF6 in acetone, followed by the addition of two molar equivalents of 1,4,7-trithiacyclononane (9S3), gives the deep red complex [Pd(C6H4N=NC6H5)(9S3)][PF 6](6A)in high yield, whereas the direct reaction of 5 with two molar equivalents of 9S3 gives [Pd(C6H4N=NC6H 5)(9S3)][Pd- (C6H4N=NC6H 5)Cl2](6B) in quantitative yield based on 5. The subsequent reaction of 5 and 6A with the metalloligand [(HMB)Ru n{r3-tpdt}] [3; HMB = n6-C6Me 6, tpdt = S(CH2- CH2S-)2] results in displacement of the chloride and 9S3 ligands, respectively, to give the Ru-Pd heterobimetallic complex [{(HMB)RuII(̂-n 2:n3-tpdt)jjPd(C6H4nf>N= NC