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,

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. [References: 16]