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New J. Chem., 2009, 33, 2296 - 2299, DOI: 10.1039/b9nj00316a

Cyanide-bridged 1D Mn(III)–Fe(III) bimetallic complexes: synthesis, crystal structure and magnetic properties

Hui-Zhong Kou, Zhong-Hai Ni, Cai-Ming Liu, De-Qing Zhang and Ai-Li Cui

Cyanide-bridged Mn(III)–Fe(III) complexes have been synthesized in order to find new molecular materials with interesting magnetic properties. 1D complexes of trans-dicyanoferrite(III), [Mn(5-Cl-salen)Fe(bpClb)(CN)2]·0.67MeCN·0.5H2O ( 1), [Mn(5-Cl-salen)Fe(bpb)(CN)2]·0.5H2O·MeOH ( 2), [Mn(5-Br-salen)Fe(bpb)(CN)2]·0.5H2O·MeOH ( 3), and [Mn(5-Me-salen)Fe(bpb)(CN)2]·0.5H2O·MeOH ( 4) have been prepared and characterized by X-ray single-crystal structure analysis and magnetic measurements. All complexes possesses 1D chains of alternate [Mn(5-R-salen)]+ and [Fe(bpRb)(CN)2]- units that are linked by two trans-cyanide ligands of [Fe(bpRb)(CN)2]-. Magnetic studies reveal that they exhibit overall intermetallic ferromagnetic coupling, while complex 4 shows a frequency-dependent AC magnetic susceptibility typical of a single-chain magnet.

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