TEMPLATE SYNTHESIS, CHARACTERIZATION AND ELECTROCHEMICAL STUDIES OF COPPER(II) MACROCYCLIC COMPLEXES DERIVED FROM 4-METHYL-2,6-DI(FORMYL BENZOYL)PHENOL AND 4-METHYL-2,6-DI(FORMYL/BENZOYL)DIAMINES/

Copper(II) macrocyclic complexes [Cu(L)Cl-2]. 2H(2)O (1, 2) have been synthesized from the copper(II)-directed condensation of 4-methyl-2,6- diformylphenol (1) or 4-methyl-2,6-dibenzoylphenol (2) with diamines [ 1,2-diaminopropane (a), 1,3-diaminopropane (b) and o-phenylenediamine (c)] in EtOH in high yields. These complexes are monomeric, non-electr olytes and paramagnetic, indicating a distorted octahedral geometry ar ound copper, which is supported by i.r., electronic, e.s.r. and magnet ic susceptibility measurements. Electrochemical studies of (I) and (2) using c.v. indicate an irreversible cathodic peak (ca. -0.65 to -0.76 V) corresponding to reduction of copper(II) to copper(I) and the diff usion-controlled nature of the electrode process.