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A macrocyclic heterodinuclear complex [Cu(II)Mn(II)L(H 2 O) 2 ](ClO 4 ) 2 was synthesized by cyclo-condensation of N , N ′-bis(3-formyl-5- n -butylsalicylidene)-ethylenediimine and diethylenetriamine in the presence of Cu 2+ and Mn 2+ . The crystal structure of the complex was determined. Variable-temperature magnetic susceptibilities and cyclic voltammograms of the complex were measured. [Cu(II)Mn(II)L(H 2 O) 2 ](ClO 4 ) 2 displays very strong antiferromagnetic exchange and undergoes a one-electron transfer process. [ABSTRACT FROM AUTHOR]

Two unsymmetrical, macrocyclic, heterodinuclear complexes, [Cu II M II (L)] (ClO 4 ) 2 · n H 2 O ( n = 3; M = Zn, Cd) have been obtained by cyclocondensation of N , N ′- bis (3-formyl-5- n -butylsalicylidene)ethylenediimine and 1,3-diaminopropane in the presence of M 2+ . The structures of both complexes were determined by X-ray diffraction techniques. In each complex, two metals are located in the tetraimine macrocyclic cavity, and a water molecule and a perchlorate group are separately coordinated to the metal ions on the same side of the ring. Coordination geometry around each metal is approximately square pyramidal. ESMS spectra were used to characterize the complexes and isotopic distributions were investigated. [ABSTRACT FROM AUTHOR]