摘要:
Convenient access to the unusual hydride complexes Cp(CO)(H)MPPh(2)C(O)N(Et)PPh(2) (M = Mo (4a,a'), W (4b,b'), obtained as mixtures of two isomers, is established via cycloaddition between the phosphenium complexes Cp(CO)(HPh(2)P)M = PPh(2) (2a,b) and EtNCO(3), Reaction of 4a,b with carbon tetrachloride yields the analogous chloro complexes Cp(CO)(Cl)MPPh(2)C(O)N(Et)PPh(2) (5a,a', 5b,b'); 5b' has been characterized by X-ray analysis.