Some Ruthenium Cluster Chemistry with Alkynes: Structures of Two Ru3 and Two Ru4 Complexes

Abstract

The molecular structures of four ruthenium cluster complexes, isolated in small amounts in the course of studies of the reactions of alkynes or a 1,3-diyne with ruthenium cluster carbonyls, are reported: Ru₃(µ₃-PhC₂C=CHPh)(µ- OH)(CO)₉ (1), from Ru₃(CO)₁₀(NCMe)₂and PhCÅflCCÅflCPh, is probably formed by addition of water to a diyne– Ru₃ precursor; Ru₃{µ₃-C(OCH₂CH=CH₂)CHCCPh₂OC(O)}(µ-dppm)(µ-CO)(CO)₆ (2) was isolated from the many products of the reaction between Ru₃(µ−dppm)(CO)₁₀and HCÅflCCPh₂(OH); Ru₄(µ4-PhCHC₂CHPh)(CO)₁₂ (3) was found among the thermolysis products of Co₂Ru₃(µ5-PhC₂C₂Ph)(µ-CO)₃(CO)₁₁; and Ru₄(µ₄-CHCCH₂- CHPMe₃)(CO)₁₀(PMe₃) (4) was formed by reaction of PMe₃ with Ru₃(µ3-HC₂H)(µ-CO)(CO)₉.