Chemistry of µ-η1: η2α,β-butadiynyls: chain extension on C4 polycarbon ligands

Abstract

The binuclear butadiynyl compounds Ru₂(CO)₆(µ-η¹, η²_{α, β}-CC-CCR)(µ-PPh₂)(R = Bu^t1a or Ph 1b), with one π-coordinated and one free triple bond, synthesised via thermolysis of Ru₃(CO)₁₁(PPh₂CC-CCR), react with NEt₂H to generate the novel diethylaminobutatriene complexes Ru₂(CO)₆[µ-η¹, η¹-Et₂NCCCC(H)R](µ-PPh₂)(R = Bu^t2a or Ph 2b) in high yields: the molecular structures of 1a and 2a are determined.