One-dimensional coordination polymer [Co(H2O)4(pyz)](NO3)(2)center dot 2H(2)O (pyz = pyrazine) with intra- and inter-chain H-bonds: structure, electronic spectral studies and magnetic properties

Holman KT; Hammud HH; Isber S; Tabbal M

首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >One-dimensional coordination polymer [Co(H2O)4(pyz)](NO3)(2)center dot 2H(2)O (pyz = pyrazine) with intra- and inter-chain H-bonds: structure, electronic spectral studies and magnetic properties

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One-dimensional coordination polymer [Co(H2O)4(pyz)](NO3)(2)center dot 2H(2)O (pyz = pyrazine) with intra- and inter-chain H-bonds: structure, electronic spectral studies and magnetic properties

机译：具有链内和链间氢键的一维配位聚合物[Co（H2O）4（pyz）]（NO3）（2）中心点2H（2）O（pyz =吡嗪）：结构，电子光谱研究和磁性

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The synthesis, structure and magnetic properties of the cobalt(II) complex (1) [Co(H2O)(4)(pyz)](NO3)(2) . 2H(2)O is reported. The compound crystallizes in the triclinic system, space group P (l) over bar, with cell constants: a = 7.0328(15) Angstrom, b = 7.1255(16) Angstrom, c = 8.4198(19) Angstrom, alpha = 107.226(4)degrees, beta = 114.242(4)degrees, gamma = 90.487(4)degrees, Z = 1 and V = 363.35(14) Angstrom(3). The structure of 1 consists of elongated octahedral CoO4N2, chromophores with bridging pyrazine ligands forming a one-dimensional coordination polymer along the crystallographic b-axis. The nitrate ions hydrogen-bond to the water ligands (L) and guest water (G), and form H2O(L) ... H2O(G) ... NO3- ... H2O(G) ... H2O(L) chains which flank either side of the coordination polymer chains. Hydrogen-bonding is extended to neighboring chains forming a two-dimensional network. The solvent effect on the electronic spectra of pyrazin and pyrazine cobalt complex 1 has been investigated. The magnetic susceptibility of complex 1 versus temperature data showed a strong antiferromagnetic coupling between Co ions. The best fitting parameters were obtained for J(1)/k(B) = -26.4 K, J(2)/k(B) = 2.2 K and g = 2.3. (C) 2004 Elsevier Ltd. All rights reserved.

机译：钴（II）配合物（1）[Co（H2O）（4）（pyz）]（NO3）（2）的合成，结构和磁性。据报道2H（2）O。该化合物在三斜晶系上结晶，空间棒上的空间群P（l）具有单元常数：a = 7.0328（15）埃，b = 7.1255（16）埃，c = 8.4198（19）埃，alpha = 107.226（4 ）度，β= 114.242（4）度，γ= 90.487（4）度，Z = 1且V = 363.35（14）埃（3）。 1的结构由细长的八面体CoO4N2，具有桥接吡嗪配体的生色团组成，沿着结晶b轴形成一维配位聚合物。硝酸根离子氢键合到水配体（L）和客体水（G）上，形成H2O（L）... H2O（G）... NO3- ... H2O（G）... H2O（ L）在配位聚合物链的任一侧的链。氢键扩展到形成二维网络的相邻链。已经研究了溶剂对吡嗪和吡嗪钴配合物1的电子光谱的影响。配合物1的磁化率与温度数据的关系表明Co离子之间的强反铁磁耦合。对于J（1）/ k（B）= -26.4 K，J（2）/ k（B）= 2.2 K和g = 2.3获得了最佳拟合参数。（C）2004 Elsevier Ltd.保留所有权利。

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《Polyhedron: The International Journal for Inorganic and Organometallic Chemistry》 |2005年第2期|共8页
作者
Holman KT; Hammud HH; Isber S; Tabbal M;
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正文语种 eng
中图分类化学;
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coordination polymer; cobalt(II) pyrazine complex; H-bond; magnetic susceptibility; CRYSTAL-STRUCTURES; MOLECULAR-STRUCTURE; SILVER(I) CATIONS; COMPLEXES; COPPER(I); COBALT(II); NITROXIDE; NETWORKS; LIGAND; MODEL;

机译：配位聚合物;吡嗪钴（II）络合物;氢键;磁化率;晶体结构;分子结构;银（I）阳离子;络合物;铜（I）;钴（II）;硝基化物;网络;配体;模型;

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1. One-dimensional coordination polymer [Co(H2O)4(pyz)](NO3)(2)center dot 2H(2)O (pyz = pyrazine) with intra- and inter-chain H-bonds: structure, electronic spectral studies and magnetic properties [J] . Holman KT, Hammud HH, Isber S, Polyhedron: The International Journal for Inorganic and Organometallic Chemistry . 2005,第2期

机译：具有链内和链间氢键的一维配位聚合物[Co（H2O）4（pyz）]（NO3）（2）中心点2H（2）O（pyz =吡嗪）：结构，电子光谱研究和磁性
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One-dimensional coordination polymer [Co(H2O)4(pyz)](NO3)(2)center dot 2H(2)O (pyz = pyrazine) with intra- and inter-chain H-bonds: structure, electronic spectral studies and magnetic properties

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