Abstract
Magnetic interactions in a new copper(II) carboxylate complex {Cu 2(O 2CH) 4}{Cu(O 2CH) 2(2-methylpyridine) 2} were studied with the aim of better understanding magneto-structural correlation in a quasi 1-D spin arrangement. The only magnetic ions in the structure (Cu 2+, S=1/2) form chains of dimer–monomer units. Copper ions in dimers are bridged by four carboxylate groups with an antiferromagnetic exchange coupling J/ k B=−320 K. Susceptibility of the monomer copper ions follows Curie 1/ T law down to 20 K. Below 20 K the susceptibility abruptly decreases due to the antiferromagnetic coupling between monomers.
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