Synthesis and Characterization of Homo and Hetero Dinuclear and Trinuclear Co(II), Ni(II), Cu(II) and Zn(II) complexes with 26-membered N4S4 Donor Macrocyclic Ligand

摘要

Complexes of general formula [M_(2)(L)Cl_(4)], [MZnCl_(4)] and [M_(3)(L)Cl_(4)] Cl_(2) where M=Co(II),Ni(II),Cu(II) and Zn(II) and L=(N,N--Bis [bis{(1,2-o-aminophenylthio)ethane}] 1-phenylbutan1,3-dilidene) were prepared from the reaction of macrocyclic ligand with the metal chloride in (1:2) and (1:3) ligand to metal molar ratio. The complexes have been characterized by elemental analysis, molar conductance measurements, spectral methods (I. R and electronic spectra), metal content and magnetic measurements. The macrocyclic ligand has two different donating atom cavities with four azomethine group and with four sulfur atoms. All the complexes show magneticmoments corresponding to a high spin configuration except for zinc complexes. On the basis of spectral and magnetic measuerements a four coordinated tetrahedral geometry may be assigned to these complexes.