Synthesis,crystal structure and magnetic properties of a two-dimensional mixed-valence assembly [Fe(salen)]2[Fe(CN)5NO] |
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| Authors: | Yuan Ai-Hua Lu Lu-De Shen Xiao-Ping Chen Li-Zhuang Yu Kai-Bei |
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| Affiliation: | (1) Material Chemistry Laboratory, Nanjing University of Science and Technology, Nanjing, 210094, P.R. China;(2) School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212003, P.R. China;(3) Department of Material and Environmental Engineering, East China Shipbuilding Institute, Zhenjiang, 212003, P.R. China;(4) Chengdu Branch of Chinese Academy of Science, Analysis Center, Chengdu, 610040, P.R. China |
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| Abstract: | A cyanide-bridged FeIII–FeII mixed-valence assembly, [FeIII(salen)]2[FeII(CN)5NO] [salen = N,N -ethylenebis(salicylideneiminato)dianion], prepared by slow diffusion of an aqueous solution of Na2[Fe(CN)5NO] · 2H2O and a MeOH solution of [Fe(salen)NO3] in an H tube, has been characterized by X-ray structure analysis, i.r. spectra and magnetic measurements. The product assumes a two-dimensional network structure consisting of pillow-like octanuclear [—FeII—CN—FeIII—NC—]4 units with dimensions: FeII—C = 1.942(7) Å, C—N = 1.139(9) Å, FeIII—N = 2.173(6) Å, FeII—C—N = 178.0(6)°, FeIII—N—C = 163.4(6)°. The FeII—N—O bond angle is linear (180.0°). The variable temperature magnetic susceptibility, measured in the 4.8–300 K range, indicates the presence of a weak intralayer antiferromagnetic interaction and gives an FeIII–FeIII exchange integral of –0.033 cm–1. |
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