Synthesis and characterization of p-phenylenediamine N,N-butan-3- one oxime ligand and its complexes with some transition metals ions Ni (ɪɪ) , Pd(ɪɪ) , Pt(ɪɪ) , Cu(ɪɪ) and Co(ɪɪ)

Abstract

A new ligand incorporating a dioxime moiety, p-phenylenediamine-N N-butane-3-one oxime, (H2L) has been prepared by reacting 1,4- phenylenediamine with 2,3- butanedionemono oxime. The ligand has been characterized by elemental analysis , i.r. ,u.v.-vis. , 1H n.m.r and EI mass spectroscopies . The ligand reacted with some metal ions to give complexes of the general formulae : [ M(HL)]+ , where M= Ni(ɪɪ) ,Pd(ɪɪ) Pt(ɪɪ) ,Cu(ɪɪ) and Co(ɪɪ) . The complexes were characterized by elemental analysis (C.H.N and A.A) along with i.r. u.v.- vis , spectroscopies , molar conductance and magnetic moment measurements , indicating a 1:1 metal : ligand ratio , and the metal ions are coordinated with ligand via N atoms of oxime and imine nitrogen atoms ( C= N) . According to the above measurements , we concluded : A square planar geometry was proposed for Ni () , Pd () , and Pt() complexes and a distorted tetrahedral geometry is proposed for Cu() , and Co(complexes .