Spacer-armed copper(II) complexes with benzenecarboxylic acids and trifluoroacetylacetone aroylhydrazones

作者：Shul' gin Victor F; Konnik Oleg V; Gusev Alexey N; Boca Roman; Dlhan Lubor; Rusanov Eduard B; Alexandrov Grygory G; Eremenko Igor L; Linert Wolfgang

来源：Dalton Transactions, 2013, 42(48): 16878-16886.

DOI：10.1039/c3dt52483c

New bi- and trinuclear copper(II) complexes of aroylhydrazones of TFA and benzenecarboxylic acids were synthesized and characterized. Despite long range intramolecular Cu center dot center dot center dot Cu distances of about 10 angstrom, exchange couplings between paramagnetic centres are observed with J values of 0.33 and 0.37 cm(-1) in binuclear complexes, and -0.33 cm(-1) in trinuclear complexes. Seven hyperfine peaks with a value of a(Cu) = 37.0 x 10(-4) cm(-1) are observed in EPR spectra of binuclear complexes. The possible mechanisms responsible for the observed weak long range coupling via aromatic spacers are discussed.

• 出版日期2013