A new one-dimensional coordination polymer and a new supramolecular dimer made of trinuclear copper(II) complexes: crystal structure and magnetic properties

被引:38
作者
Gao, EQ
Zhao, QH
Tang, JK
Liao, DZ [1 ]
Jiang, ZH
Yan, SP
机构
[1] Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China
[2] Qufu Normal Univ, Dept Chem, Qufu 273165, Peoples R China
[3] Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Peoples R China
来源
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 2001年 / 09期
关键词
D O I
10.1039/b100142f
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Two oxamato-bridged copper(II) complexes of formula [Cu-3(pbaOH)(tmen)(2)(H2O)(ClO4)](n)[ClO4](n). nH(2)O 1 and [Cu-3(opba)(tmen)(2)(H2O)(3)][Cu-3(opba)(tmen)(2)(H2O)(2)][ClO4](4). 3H(2)O 2 have been synthesized and characterized by IR, ESR, electronic spectra and X-ray crystallographic analyses, where pbaOH(4-)=2-hydroxyl-N,N'-trimethylenebis(oxamate), opba(4-)=N,N'-o-phenylenebis(oxamate), tmen=N,N,N',N'-tetramethylethylenediamine. Both complexes consist of cationic trinuclear entities, in which copper atoms reside in square-planar (4) or square-pyramidal (4+1) environments. In complex 1 the hydroxyl group of one trinuclear entity coordinates to a terminal copper atom of another, thus forming an unusual one-dimensional chain. In 2 two neighboring trinuclear cations interact to form an interesting supramolecular (or "supracationic") dimer. The magnetic properties of the two complexes have been investigated, indicating that two copper(II) ions bridged by the oxamato bridge interact antiferromagnetically with J=-334.4 cm(-1) for 1 and -356.6 cm(-1) for 2 (based on (H) over cap=-J (S) over cap (1).(S) over cap (2)).
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页码:1537 / 1540
页数:4
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