Ruthenium Seleno- and Tellurocarbonyl Complexes: Selenium and Tellurium Atom Transfer to a Terminal Carbido Ligand

Abstract

The first five-coordinate selenocarbonyl complex, [RuCl 2 (CSe)(H 2 IMes)(PCy 3 )] ( 2 - CSe; H 2 IMes = 1,3-dimesitylimidazolin-2-ylidene), and the tellurocarbonyl complex [RuCl 2 (CTe)(H 2 IMes)(dmap) 2 ] ( 3-CTe; dmap = 4-(dimethylamino)pyridine) was obtained by selenium and tellurium atom transfer reaction to the carbido complex [RuCl 2 (C)(H 2 IMes)(PCy 3 )]. Systematic elucidation of the complete series of chalcogenocarbonyl complexes revealed that tellurocarbonyl complex 3-CTe is a potential tellurium atom transfer reagent.