Ligandensubstitution an cis-Mo(CO)2(PPh3)2(MeCN)(η2-SO2), Kristall- und Molekülstruktur von cis-Mo(CO)2(PMe3)3(η2-SO2) / Ligand Substitution at cis-Mo(CO)2(PPh3)2(MeCN)(η2-SO2), Crystal and Molecular Structure of cis-Mo(CO)2(PMe3)3(η2-SO2)

Mo(CO)₂(PPh₃)₂(MeCN)(η²-SO₂), reacts with a number of unidentate or tridentate phosphines with displacement of both MeCN and PPh₃. Mixtures of up to three different isomers are obtained the structures of which are assigned by IR , ¹H, ¹³C, and ³¹PNMR , and in one case by X-ray crystallography. The results support earlier observations concerning the relationship between the disposition of donor and acceptor ligands around the metal and the bonding mode of SO₂ .