From One-dimensional Chain to Pentanuclear Molecule. Magnetism of Cyano-Bridged Fe(III)−Ni(II) Complexes

Two cyano-bridged Ni(II)−Fe(III) complexes {(H3O)[Ni(H2L)]2[Fe(CN)6]2·[Fe(CN)6]·6H2O} n (1 ) and [K(18-C-6)(H2O)2][Ni(H2L)]2[Fe(CN)6]3·4(18-C-6)·20H2O (2 ) (L = 3,10-bis(2-aminoethyl)-1,3,6,8,10,12-hexaazacyclotetradecane, 18-C-6 = 18-crown-6-ether) have been synthesized and characterized structural...

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Published in:Inorganic chemistry 2002-12, Vol.41 (25), p.6887-6891
Main Authors: Kou, Hui-Zhong, Zhou, Bei Chuan, Liao, Dai-Zheng, Wang, Ru-Ji, Li, Yadong
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cited_by cdi_FETCH-LOGICAL-a412t-ea39135874be7b40c899a2b9ad01cd738b102bf20ec04473c12cdebc5530ea7e3
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container_end_page 6891
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container_title Inorganic chemistry
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creator Kou, Hui-Zhong
Zhou, Bei Chuan
Liao, Dai-Zheng
Wang, Ru-Ji
Li, Yadong
description Two cyano-bridged Ni(II)−Fe(III) complexes {(H3O)[Ni(H2L)]2[Fe(CN)6]2·[Fe(CN)6]·6H2O} n (1 ) and [K(18-C-6)(H2O)2][Ni(H2L)]2[Fe(CN)6]3·4(18-C-6)·20H2O (2 ) (L = 3,10-bis(2-aminoethyl)-1,3,6,8,10,12-hexaazacyclotetradecane, 18-C-6 = 18-crown-6-ether) have been synthesized and characterized structurally and magnetically. Complex 1 has a zigzag one-dimensional structure, in which two trans-CN- ligands of each [Fe(CN)6]3- link two trans-[Ni(H2L)]4+ groups, and in turn, each trans-[Ni(H2L)]4+ links two [Fe(CN)6]3- in a trans fashion. Complex 2 is composed of cyano-bridged pentanuclear molecules with moieties connected by the trans-CN- ligands of [Fe(CN)6]3-. Magnetic studies show the existence of ferromagnetic Ni(II)−Fe(III) interactions in both complexes. The intermetallic magnetic coupling constant of both complexes was analyzed by using an approximate model on the basis of the structural features.
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title From One-dimensional Chain to Pentanuclear Molecule. Magnetism of Cyano-Bridged Fe(III)−Ni(II) Complexes
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