Preparation, crystal structures and spectroscopic characterization of oxalate copper(II) complexes containing the nitrogen ligands 4,4′-dimethyl-2,2′-bipyridine and di(2-pyridyl) sulfide

被引：34
作者：
de Faria, Daniella M.
Yoshida, Maria Irene
Pinheiro, Carlos B.
Guedes, Kassilio Jose
Krambrock, Klaus
Diniz, Renata
de Oliveira, Luiz Fernando C.
Machado, Flavia C. [1 ]
机构：
[1] Univ Fed Juiz Fora, ICE, Dept Quim, BR-36036 Juiz De Fora, MG, Brazil
[2] Univ Fed Minas Gerais, ICEx, Dept Quim, BR-31270 Belo Horizonte, MG, Brazil
[3] Univ Fed Minas Gerais, ICEx, Dept Fis, BR-30123 Belo Horizonte, MG, Brazil
来源：
POLYHEDRON | 2007年 / 26卷 / 15期
关键词：
copper(II) complexes; di(2-pyridyl) sulfide; 4,4 '-dimethyl-2,2 '-bipyridine; oxalate dianion; molecular building blocks;
D O I：
10.1016/j.poly.2007.06.027
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The preparation, crystal structures and spectroscopic characterization of four oxalate copper(II) complexes containing the 4,4'-dimethyl-2,2'-bipyridine (Mebpy) or di(2-pyridyl)sulfide (DPS) nitrogen ligands namely [mu-(ox){Cu(Mebpy)(NO3)(H2O)121 (1), [mu-(ox){Cu(Mebpy)(ClO4)(H2O)}2] (2), [mu-(ox){Cu(DPS)(H2O)}(2)](ClO4)(2) (3) and [Cu(DPS)(ox)(H2O)]center dot 2H(2)O (4) are described. X-ray diffraction measurements have shown that complexes 1-3 are binuclear, in which the oxalate anion bridges two Cu(II) centers, while the complex (4) is mononuclear and the oxalate anion adopts the terminal bidentate chelating coordination mode. In 1 and 2 the Cu(II) sites display a distorted octahedral geometry (4+2 environment) and in compounds 3 and 4 the Cu(II) centers exhibit a slightly distorted square pyramidal geometry. In addition, complexes 1 and 2 present a 2D supramolecular arrangement through hydrogen bonds between coordination water molecules and nitrate or perchlorate anions and pi-stacking interaction between the pyridyl rings of Mebpy nitrogen ligands. (c) 2007 Elsevier Ltd. All rights reserved.
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页码：4525 / 4532
页数：8
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