Magneto-structural study on a series of rhenium(IV) complexes containing biimH(2), pyim and bipy ligands

Martinez-Lillo J; Armentano D; De Munno G; Faus J

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Magneto-structural study on a series of rhenium(IV) complexes containing biimH(2), pyim and bipy ligands

机译：一系列含biimH（2），pyim和bipy配体的rh（IV）配合物的磁结构研究

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Three rhenium(IV) mononuclear compounds of formulae [ReCl4(biimH(2))]center dot 2DMF (1), [ReCl4(pyim)] center dot DMF (2) and [ReCl4(bipy)] (3) (biimH(2) = 2,2'-biimidazole, pyim = 2-(2'-pyridyl)imidazole, bipy = 2,2'-bipyridine and DMF = N,N-dimethylformamide) have been prepared and characterized. The crystal structure of 2 was determined by single crystal X-ray diffraction. Compound 2 crystallizes in the monoclinic system with P2(1)/c as space group. The rhenium atom is six-coordinated by four Cl atoms and two nitrogen atoms from a bidentate pyim ligand [average values of Re-Cl and Re-N bonds lengths being 2.330(2) and 2.117(4) angstrom, respectively]. The magnetic properties were investigated from susceptibility measurements performed on polycrystalline samples of 1-3 in the temperature range 1.9-300 K. The magnetic behaviour found is typical of antiferromagnetically coupled systems, and they,exhibit susceptibility maxima at 2.8 (1 and 2) and 5.6 K (3). Short Re-IV-Cl center dot center dot center dot Cl-Re-IV contacts through space account for the antiferromagnetic behaviour observed. (C) 2008 Elsevier Ltd. All rights reserved.

机译：三种式[ReCl4（biimH（2））]中心点2DMF（1），[ReCl4（pyim）]中心点DMF（2）和[ReCl4（bipy）]（3）的mono（IV）单核化合物（biimH（ 2）已经制备并表征了2，2′-联咪唑，pyim ＝ 2-（2′-吡啶基）咪唑，bipy ＝ 2，2′-联吡啶和DMF ＝ N，N-二甲基甲酰胺。 2的晶体结构通过单晶X射线衍射测定。化合物2在单斜晶系体系中以P2（1）/ c为空间基团结晶。 a原子由二齿pyim配体（分别由Re-Cl和Re-N键长的平均值分别为2.330（2）和2.117（4）埃）与六个Cl原子和两个氮原子六配位。通过在1.9-300 K的温度范围内对1-3的多晶样品进行的磁化率测量研究了磁性能。发现的磁性能是反铁磁耦合系统的典型特征，它们的磁化率最大值在2.8（1和2）和5.6 K（3）。短的Re-IV-Cl中心点中心点中心点Cl-Re-IV通过空间接触导致观察到的反铁磁行为。（C）2008 Elsevier Ltd.保留所有权利。

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《Polyhedron: The International Journal for Inorganic and Organometallic Chemistry》 |2008年第5期|共8页
作者
Martinez-Lillo J; Armentano D; De Munno G; Faus J;
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正文语种 eng
中图分类化学;
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rhenium(IV) complexes; 2; 2 '-biimidazole; 2-(2 '-pyridyl)imidazole; 2; 2 '-bipyridine; magnetic properties; CRYSTAL-STRUCTURE; MAGNETIC-PROPERTIES; COORDINATION CHEMISTRY; RADIOPHARMACEUTICALS; REACTIVITY; CL; 2; 2'-BIIMIDAZOLE; SUBSTITUTION; BR;

机译：（（IV）络合物;2;2'-联咪唑;2-（2'-吡啶基）咪唑;2;2'-联吡啶;磁性;晶体结构;磁性;配位化学;放射性药物;反应性;CL;2;2'-双咪唑;取代基;BR;

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Magneto-structural study on a series of rhenium(IV) complexes containing biimH(2), pyim and bipy ligands

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