A new unique tetranuclear Cu(II) compound with double bridging thiocyanate anions: Synthesis,X-ray structure and magnetism of [Cu_4(mu_(1,3)-NCS)_6(dpyam)_4(O_2CH)_2(H_2O)_2] (dpyam = di-2-pyridylamine)

Sujittra Youngme; Jaturong Phatchimkun; Unchulee Suksangpanya; Chaveng Pakawatchai; Gerard A.van Albada

首页> 外文期刊>Inorganic Chemistry Communications >A new unique tetranuclear Cu(II) compound with double bridging thiocyanate anions: Synthesis,X-ray structure and magnetism of [Cu_4(mu_(1,3)-NCS)_6(dpyam)_4(O_2CH)_2(H_2O)_2] (dpyam = di-2-pyridylamine)

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A new unique tetranuclear Cu(II) compound with double bridging thiocyanate anions: Synthesis,X-ray structure and magnetism of [Cu_4(mu_(1,3)-NCS)_6(dpyam)_4(O_2CH)_2(H_2O)_2] (dpyam = di-2-pyridylamine)

机译：一种新型的具有双桥联硫氰酸根阴离子的独特的四核Cu（II）化合物：[Cu_4（mu_（1,3）-NCS）_6（dpyam）_4（O_2CH）_2（H_2O）_2]的合成，X射线结构和磁性（dpyam =二-2-吡啶胺）

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A new unique tetranuclear copper(II) complex doubly-bridged by thiocyanate anions [Cu_4(mu_(1,3)-NCS)_4(dpyam)_4(O_2CH)_2(H_2O)_2 (dpyam = di-2-pyridylamine) has been synthesized and characterized by X-ray diffraction methods and magnetic measurements.The "outer" Cu ions,with a CuN_3O(S,O) chromophore,have an axially elongated octahedral geometry.The basal plane of these outer Cu(II) ions consist of 2 nitrogen atoms of the dpyam ligand with Cu-N distances of 1.980(2) and 2.008(2) A,one nitrogen atom of a bridging thiocyanate anion (Cu-N distance 1.961(3) A) and an oxygen atom of a formate molecule (Cu-O distance 1.977(1) A).The axial positions are occupied by an oxygen atom of a water molecule (Cu-O distance 2.518(1) A and by a sulfur atom of a bridging thiocyanate anion at a semi-coordination distance of 3.048(1) A.The "inner" Cu atoms,with a CuN_4(S_2) chromophore do also have an axially elongated octahedral geometry.The basal plane is formed by 2 nitrogen atoms of the dpyam ligand with Cu-N distances of 1.995(2) and 2.018(3) A and two nitrogen atoms of two bridging thiocyanate anions (Cu-N distances 1.946(3),1.976(3) A).The axial positions are occupied by two sulfur atoms of two bridging thiocy-nate anions (Cu-S semi-coordinating distances are 2.875(1) and 3.126(1) A).Each Cu ion is bridged by two mu_(1,3)-NCS anions (in an equatorial-axial bridging mode) forming in this way a zigzag tetranuclear unit.The magnetic susceptibility data of the compound have been investigated between 5 and 200 K.The compound shows a very weak antiferromagnetic interaction between the Cu ions,in agreement with the non-overlapping magnetic orbitals of each Cu ion.

机译：一个新的独特的四核铜（II）络合物，由硫氰酸根阴离子[Cu_4（mu_（1,3）-NCS）_4（dpyam）_4（O_2CH）_2（H_2O）_2（dpyam = di-2-pyridylamine）双桥通过X射线衍射法和磁测量法对其进行了合成和表征。具有CuN_3O（S，O）发色团的“外部” Cu离子具有轴向伸长的八面体几何形状。这些外部Cu（II）离子的基面组成的铜-氮距离为1.980（2）和2.008（2）A的dpyam配体的2个氮原子中，桥连硫氰酸根阴离子的一个氮原子（铜-氮距离为1.961（3）A）和一个氧原子甲酸分子（Cu-O距离1.977（1）A）。轴向位置被水分子的氧原子（Cu-O距离2.518（1）A和桥连的硫氰酸根阴离子的硫原子占据） -配位距离为3.048（1）A。带有CuN_4（S_2）发色团的“内部” Cu原子也确实具有轴向伸长的八面体几何形状。基面由dpyam配体w的2个氮原子形成Cu-N距离为1.995（2）和2.018（3）A以及两个桥接硫氰酸根阴离子的两个氮原子（Cu-N距离为1.946（3），1.976（3）A）。轴向位置被两个硫占据两个桥接硫代酸根阴离子的原子（Cu-S半配位距离为2.875（1）和3.126（1）A）。每个Cu离子由两个mu_（1,3）-NCS阴离子桥接（在赤道-轴向桥联模式）以这种方式形成一个锯齿形的四核单元。该化合物的磁化率数据已在5至200 K之间进行了研究。该化合物显示出Cu离子之间非常弱的反铁磁相互作用，与不重叠的磁性相符每个Cu离子的轨道。

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来源
《Inorganic Chemistry Communications》 |2006年第2期|共6页
作者
Sujittra Youngme; Jaturong Phatchimkun; Unchulee Suksangpanya; Chaveng Pakawatchai; Gerard A.van Albada;
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正文语种 eng
中图分类无机化学;
关键词
Copper(II); Crystal structure; EPR; Magnetism; Di-2-pyridylamine; Thiocyanate-bridging ligands;

机译：铜;晶体结构;EPR;磁性;二-2-吡啶胺;硫氰酸盐桥联配体;

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A new unique tetranuclear Cu(II) compound with double bridging thiocyanate anions: Synthesis,X-ray structure and magnetism of [Cu_4(mu_(1,3)-NCS)_6(dpyam)_4(O_2CH)_2(H_2O)_2] (dpyam = di-2-pyridylamine)

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