New Dinuclear Schiff Base Complexes of Mn(II) Derived from Amino Acids

In this study we describe the synthesis and characterization of four and six coordinated compounds of Mn(II)with Schiff bases derived from vanillin with amino acids (glycine, Lserine, L-tyrosine, and L-phenylalanine).These complexes were characterized by many physicochemical methods such as elemental analysis (CHN),magnetic susceptibility, molar conductance as well as spectral studies such as IR and UV-Visible .The analytical data showed that the complexes having the formulas [Mn(VA)(H_2O)]_2,[Mn_2(VA)(CH_3COO)(H_2O)_2] ,whereA-=serine or tyrosine[Mn_2(Vg)(CH_3COO)(H_2O)_3], [Mn_2(VA*H_2)_2(H_2O)_2(NO_3)_2](NO_3)_2 and Na_2[Mn_2(VA*)_2(H_2O)_2(NO_3)_2] , A* = all the amino acids .The ligands behave as Tetradentate coordinating through the atoms NOOO, or tridentate NOO; where V=vanillin, A=amino acids (glycine and phenylalanine) that suggested tetrahedral and octahedral geometry.