No abstract

Reactions of 1‐phenylethyne HC≡C−Ph and 1‐octyne HC≡C‐(CH2)5CH3 with RuCl2(PPh3)3 (1) were carried out in the presence of concentrated HCl aqueous solution, and new acyl complexes Ru(=C=CHPh)(‐C(=O)CH2Ph)Cl(PPh3)2 (2) and Ru(‐C(=O)(CH2)6CH3)Cl(CO)(PPh3)2 (3) are isolated. Further decarbonylation produces Ru(‐C(CH2Ph)=CHPh)Cl(CO)(PPh3)2 (4) and RuHCl(CO)2(PPh3)2 (5), respectively. These are the first examples of stoichiometric anti‐Markovnikov hydration of terminal alkynes involving complexes without polydentate ligands.