名称:
Synthesis of the mononuclear Mo(CO)4(L) [L = 5,6-diphenyl-3-(2-pyridyl)-1,2,4-triazine (dppt) or 3,5,6-tri(2-pyridyl)-1,2,4-triazine (tpt)] complexes and the chelating action of the Mo(CO)4(tpt) derivative towards M(hfac)2 (M = Mn, Fe, Co, Ni, Cu Zn; hfac = hexafluoracetylacetonate ion)
摘要:
The novel mononuclear tetracarbonyl complexes Mo(CO)(4)(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), have been synthesized and characterized. The ligands dppt and tpt seem to be coordinated to the metal centre via a pyridyl nitrogen and a triazine nitrogen. The tpt complex Mo(CO)(4)(tpt) is effective as a bidentate chelating system toward the acidic M(hfac)(2) (M = Mn, Fe, Co, Ni, Cu, Zn) species producing the bimetallic (CO)(4)Mo(tpt)M(hfac)(2) compounds. In these Mo-tpt-M products the ligating Mo(CO)(4)(tpt) complex is coordinated in an unusual mode involving only pyridyl nitrogen atoms. The new substances were characterized by IR, H-1 NMR, electronic spectroscopy, electrochemical and magnetic moment measurements.