Three new dinuclear copper(II) complexes with [Cu(mu_(1,3)-N_3)_2Cu]~(2+) and [Cu(mu_(1,1)-N_3)_2Cu]~(2+) asymmetrical cores:syntheses,structures and magnetic behaviour

Albert Escuer; Merce Font-Bardia; Salah S.Massound; Franz A.Mautner; Evaristo Penalba; Xavier Solans; Ramon Vicente

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Three new dinuclear copper(II) complexes with [Cu(mu_(1,3)-N_3)_2Cu]~(2+) and [Cu(mu_(1,1)-N_3)_2Cu]~(2+) asymmetrical cores:syntheses,structures and magnetic behaviour

机译：三个新的具有[Cu（mu_（1,3）-N_3）_2Cu]〜（2+）和[Cu（mu_（1,1）-N_3）_2Cu]〜（2+）不对称核的双核铜（II）配合物：合成，结构和磁行为

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Three new dinuclear copper(II) complexes,derived from end-to-end and end-on azido bridging ligands and triamine derivatives,have been synthesized and their crystal structures have been determined by X-ray diffraction methods.These are the dinuclear end-to-end compounds,[Cu_2(mu_(1,3)-N_3)_2(Et_3dien)_2](ClO_4)_2 (1) and [Cu_2(mu_(1,3)-N_3)_2(Medpt)_2](ClO_4)_2 (2),and the dinuclear end-on compound [Cu_2((mu_(1,1)-N_3)_2(Medien)_2)(ClO_4)_2 (3) (Et_3dien is triethyldiethylenetriamine,Medpt is methyldipropylenetriamine and Medien is methyldiethylenetriamine).The [Cu(mu-N_3)_2Cu]~(2+) cores are asymmetrical in all 3 compounds.Variable temperature magnetic susceptibility data were collected-and fitted to the appropriate equation derived from the Hamiltonian H=-JS_1S_2.1 shows unusual ferromagnetic interactions with J=9 cm~(-1) through the end-to-end azido bridges while 2 shows an antiferromagnetic interaction through the end-to-end azido bridges with the highest reported absolute magnitude of J=-105 cm~(-1).The magnetic data of 1 and 2 have been correlated with the Addison parameter,T,and mainly with the Cu-N_3-Cu torsion angle,A.3 shows an unusual antiferromagnetic interaction with J=-16.8 cm~(-1) through the end-on azido bridges.

机译：合成了三种新的端核和端基叠氮基桥联配体和三胺衍生物衍生的双核铜（II）配合物，并通过X射线衍射法确定了它们的晶体结构。端化合物[Cu_2（mu_（1,3）-N_3）_2（Et_3dien）_2]（ClO_4）_2（1）和[Cu_2（mu_（1,3）-N_3）_2（Medpt）_2]（ ClO_4）_2（2）和双核末端化合物[Cu_2（（mu_（1,1）-N_3）_2（Medien）_2）（ClO_4）_2（3）（Et_3dien是三乙基二亚乙基三胺，Medpt是甲基二丙烯三胺和Medien [Cu（mu-N_3）_2Cu]〜（2+）核在所有3种化合物中都是不对称的。收集了可变温度磁化率数据，并将其拟合为从哈密顿量H = -JS_1S_2导出的适当方程式。图1显示了通过端到端叠氮桥的J = 9 cm〜（-1）的异常铁磁相互作用，而图2显示了通过端到端叠氮桥的反铁磁相互作用，报道的绝对强度最高J = -105 cm〜（-1）.A和3的磁数据与Addison参数T相关，并且主要与Cu-N_3-Cu扭转角相关，A.3与J = -16.8 cm〜（-1），穿过端基叠氮桥。

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《New Journal of Chemistry》 |2004年第6期|共6页
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Albert Escuer; Merce Font-Bardia; Salah S.Massound; Franz A.Mautner; Evaristo Penalba; Xavier Solans; Ramon Vicente;
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Three new dinuclear copper(II) complexes with [Cu(mu_(1,3)-N_3)_2Cu]~(2+) and [Cu(mu_(1,1)-N_3)_2Cu]~(2+) asymmetrical cores:syntheses,structures and magnetic behaviour

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