Palladium(II) complexes with 8-quinolinethiol: Structure of trinuclear palladium 2-methylthio-8-quinolinethiolate Pd-3[C9H5(SCH2)NS](3)

Palladium 2-methylthio-8-quinolinethiolate was synthesized as single crysta ls. The formula Pd-3[C9H5(SCH2)NS](3) was established by X-ray crystallogra phy. The crystal structure is composed of neutral trinuclear complexes with the zigzag six-membered heterocycle (3Pd + 3S) in the core. Three crystall ographically nonequivalent palladium atoms are in distorted cis square (2S + N + C) coordination environments. Each of the three palladium atoms close s two five-membered chelate rings (S,N and C,N rings) with the same ligand. Chelate formation is accompanied by substitution of a palladium atom for a hydrogen atom of the methyl group (C,N ring). The tridentate coordination mode (S,N,C) of 2-methylthio-8-quinolinethiol with the S(thiol) bridge is o bserved for the first time.