SYNTHESIS AND MAGNETIC-PROPERTIES OF THE ONE-DIMENSIONAL LINEAR-CHAINSTRUCTURE CYANO-BRIDGED COMPLEX (H2O)(2)][CU(TETA)FE(CN)(6)]CLO4-CENTER-DOT-2H(2)O (TETA = 4,14-HEXAMETHYL-1,4,8,11-TETRAAZACYCLOTETRADECANE)

Reaction of either K-3[Fe(CN)(6)] or K-4[Fe(CN)(6)] with a macrocyclic Cu-II complex, [Cu(teta)](ClO4)(2) (teta = 4,14-hexamethyl-1,4,8,11-t etraazacylotetradecane), in aqueous solution gave the same product as shown by spectroscopic and physicochemical characterisation. The cryst al structure of the complex shows that it is a one-dimensional linear chain type heterobinuclear Fe-III-Cu-II polymer. The unit is composed of a [Cu(teta)(H2O)(2)](2+) cationic complex, a Fe-III-Cu-II alternate linear chain unit, a ClO4- ion and four water molecules. The Cu atom is coordinated in a distorted octahedral arrangement by four nitrogen atoms from one teta ligand and two nitrogen atoms of the bridging cyan ide groups. The Cu-N bond distances involving the cyanide bridges, 2.5 22(7) and 2.608(7) Angstrom, respectively, indicate weak antiferromagn etic interactions between the Fe-III and Cu-II atoms.