Synthesis and structures of two isomers of [Re 3Ru(S)(C 5H 4N)(C 5H 4NS) 2(CO) 11] which differ in the distribution of pyridine-2-thionato ligands between doubly- and triply-bridging positions

Abstract

The pyridine-2-thionato (pyS) bridged compound [Re 2(pyS) 2(CO) 6] reacts with [Ru 3(CO) 12] to give various tetranuclear compounds built from Re(pyS)(CO) 3 and Ru(CO) x ( x = 2, 3 or 4) units: [ReRu 3(S)(C 5H 4N)(CO) 14], [Re 2Ru 2(S)(C 5H 4N)(pyS)(CO) 13], and [Re 3Ru(S)(C 5H 4N)(pyS) 2(CO) 11] as two isomers. X-ray structures of these isomers show that one contains two doubly-bridging pyS ligands and the other one doubly- and one triply-bridging pyS ligands.