Synthesis of phosphido-bridged ruthenium–manganese complexes; X-ray crystal structures of [RuMn(µ-H)(µ-PPh2)(η5-C5H5)(CO)5], [Ru2(µ-H)(µ-PPh2)(η5-C5H5)2(CO)2] and [RuMn2(µ-H)(µ-PPh2)2(η5-C5H5)(CO)9]

Abstract

The complex [RuMn(η⁵-C₅H₅)(CO)₇]1 has been synthesised in 70% yield from the reaction of [Ru(η⁵-C₅H₅)(CO)₂I] with Na[Mn(CO)₅]. Photolytic reaction of 1 with PPh₂H gives the new complexes [RuMn(µ-H)(µ-PPh₂)(η⁵-C₅H₅)(CO)₅]2, [Mn₂(µ-H)(µ-PPh₂)(CO)₇(PPh₂H)]3, trans- and cis-[Ru₂(µ-H)(µ-PPh₂)(η⁵-C₅H₅)₂(CO)₂]4a and b, [RuMn₂(µ-H)(µ-PPh₂)₂(η⁵-C₅H₅)(CO)₉]5 and [RuMn₂(µ-H)(µ-PPh₂)₂(η⁵-C₅H₅)(CO)₈(PPh₂H)]6 together with the known complexes [Mn₂(µ-H)(µ-PPh₂)(CO)₈] and [Ru₂(η⁵-C₅H₅)₂(CO)₄]. The crystal structures of 2, 4a and 5 have been determined. Structures are proposed for the other new complexes and the mechanism of the photolytic reaction of 1 with PPh₂H is discussed.