Nucleophilic addition at the bridging ethynyl ligand in [Os3H(µ-3-CCH)(CO)9] and hydrolytic cleavage of the carbon–carbon triple bond

Abstract

The addition of ethanol, ammonia, diethylamine, pyridine etc. at [Os₃H(µ₃-CCH)(CO)₉] gives clusters containing the new triply bridging ligands EtOCCH, CCHOEt, NH₂CCH, Et₂NCCH etc., while the reaction of water with [Os₃H₂(µ₃-CCH)(CO)₉]⁺ leads to [Os₃H₃(µ₃-CH)(CO)₉] and [Os₃H₃(µ₃-CCHO)(CO)₉] by nucleophilic attack at the α- and β-carbon atoms respectively.