Reaction of Technetium(I) Tricarbonyl Hexafluoroacetylacetonate Complexes with CCl: Formation and Crystal Structure of [ТсСl(СО)(РРh)] Stereoisomers and of fac-[ТсСl(СО)(СНN)]

In the course of prolonged interaction in the system consisting of [Тс(hfa)(СО)] (hfa is the anion of 1,1,1,5,5,5-hexafluoroacetylacetone), triphenylphosphine (РРh) or pyridine (py), and CCl, the hfa anion is gradually displaced by the chloride ion with the formation of the complexes fac- and mer-[ТсСl(СО)(РРh)] and fac-[ТсСl(СО)(py)]. The crystal and molecular structures of the complexes were determined. The complex fac [ТсСl(СО)(РРh)] is the first structurally confirmed example of technetium(I) tricarbonyl bis(triphenylphosphine) complexes of facial structure.