Synthesis and characterization of [ReCl(CO)3(L)] [L = 5,6-diphenyl-3-(2-pyridyl)-1,2,4-triazine (dppt) or 3,5,6-trl(2-pyridyl)-1,2,4-triazine (tpt)] and the bidentate coordination of the metalloligand [ReCl(CO)3(tpt)] to [M(hfac)2] (M = Mn, Fe, Co, Ni, Cu, Zn ; hfac = hexafluoroacetylacetonate ion)

Article abstract of DOI:10.1016/0277-5387(95)00263-R

The synthesis and characterization of the novel mononuclear species [ReCl(CO)₃(L)], where L is 5,6-diphenyl-3-(2-pyridyl)-1.2.4-triazine (dppt) or 3,5,6-tri(2-pyridyl)-1,2,4-triazine (tpt), is reported. The coordination mode of the dppt and tpt ligands to the ReCl(CO)₃ fragment apparently occurs through a pyridyl nitrogen and a triazine nitrogen. In addition, the tpt based monomer [ReCl(CO)₃(tpt)] behaves as a bidentate metalloligand, reacting with the [M(hfac)₂] (M = Mn, Fe, Co, Ni, Cu, Zn; hfac = hexafluoroacetylacetonate ion) complexes to produce the heterobimetallic substances [(CO)₃ClRe(tpt)M(hfac)₂]. In these Re - tpt - M complexes the tpt - M binding is atypical, since only the two free pyridyl nitrogen atoms of the chelating [ReCl(CO)₃(tpt)] complex are involved. The new compounds were characterized by IR, ¹H NMR and electronic spectroscopy, electrochemical and magnetic moment measurements.