Notes. [RhPd2(pyS)4(η3-C4H7)2][BF4]: synthesis and X-ray structure of a mixed-metal trinuclear complex containing two µ3-pyridine-2-thionato (pyS) ligands

Abstract

The complex [Rh^III(pyS)₃(pySH)], containing two chelating pyridine-2-thionato (pyS) ligands, one monodentate S-bonded pyridine-2-thionato ligand, and one monodentate S-bonded 1H-pyridine-2-thione (pySH) ligand, reacts with triethylamine and two equivalents of the 2-methylallyl complex [Pd(η³-C₄H₇)S₂][BF₄](S = solvent = H₂O or acetone) to yield the trinuclear compound [Rh^III(pyS)₂(µ₃-pyS)₂{Pd^II(η³-C₄H₇)}₂][BF₄], (1). The structure of (1), determined by single-crystal X-ray diffraction, contains two chelating pyridine-2-thionato ligands at rhodium and two which bridge all three metal atoms as part of a bicyclic cage. None of the metal atoms is within bonding distance. The structure may be regarded as containing the cyclic bidentate ligand [Pd₂(µ-pyS)₂(η³-C₄H₇)₂] chelated to the group [Rh^III(pyS)₂]⁺ through two sulphur atoms.