Crystal structure and linear chain antiferromagnetism in Mn(tricyanomethanide)2(4,4′-bipyridine)2

被引：20
作者：
Manson, JL
Schlueter, JA
机构：
[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
[2] Eastern Washington Univ, Dept Chem & Biochem, Cheney, WA 99004 USA
来源：
INORGANICA CHIMICA ACTA | 2004年 / 357卷 / 13期
关键词：
tricyanomethanide ligand; 4,4 '-bipyridine ligand; coordination polymer; crystal structure;
D O I：
10.1016/j.ica.2004.06.001
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A new linear chain antiferromagnet, namely Mn(tcm)(2)(4,4'-bipy)(2) (tcm = tricyanomethanide and bipy = bipyridine) has been synthesized and characterized by X-ray crystallography and magnetic susceptibility measurements. Each Mn2+ is high-spin S = 5/2 and linked to nearest-neighbor spin sites via mu-bridged tcm ligands to form a I D linear chain while the bipy ligands are monodentate and segregate the chains. Magnetically, a broad maximum in chi'(T) is observed at 2.1 K and likely signifies short-range magnetic order within the chains. A least-squares fit of the chi(T)(T) data to a classical-spin Fisher chain model yielded good agreement for g = 2.008(1) and J = -0.217(4) K. No long-range magnetic ordering is observed above 1.6 K due to the presence of very weak interchain magnetic interactions as indicated by inclusion of a mean-field model that gave zJ' = -0.009(1) K. (C) 2004 Published by Elsevier B.V.
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页码：3975 / 3979
页数：5
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