PREPARATION AND SPECTRAL CHARACTERIZATION OF NEW THIAZOLYLAZO LIGAND WITH SOME TRANSITION METAL COMPLEXES

Abstract

Some transition metal complexes of Fe(ш),Co(п),Ni(п),Cu(п),Zn(п)and Ag(І) with new benzothiazolylazo ligand 2-[(6-nitro-2--benzothiazolyl)azo]-4-nitro phenol(6-NO2BTAP=LH)were prepared and characterized by elemental analysis ,magnetic susceptibility at room temperature ,molar conductance measurements, infrared and electronic spectra. The isolated solid complexes are found to have the general formula [ML2]Cln.mH2O, where n=1,m=1 when M=Fe (ш), Co(п) and n=0, m=0 when M= Ni(п) and Cu(п) or [MLX]. mH2O when x= Cl ,m=1 ,M= Zn(п) and x=H2O,m=0,M= Ag(І).Electronic spectra and magnetic susceptibility data has supported the proposed octahedral geometry of Fe(ш),Co(п) Ni(п) and cu(п) complexes , but tetrahedral geometry of Zn(п) and Ag(І) complexes .The coordination number of all ions are found to be six ,except of Zn(п) and Ag(І) were found four ,with bonding through the phenolate O ,azo N and with thiazole N .The mole ratio method of the metal:ligand (M:L) has showed 1:2 for all the prepared complexes except of Zn(п) and Ag(І) complexes were found 1:1.