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首页> 外文期刊>European journal of inorganic chemistry >Copper(II) Complexes of Schiff-Base and Reduced Schiff-Base Ligands:Influence of Weakly Coordinating Sulfonate Groups on the Structure and Oxidation of 3,5-DTBC
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Copper(II) Complexes of Schiff-Base and Reduced Schiff-Base Ligands:Influence of Weakly Coordinating Sulfonate Groups on the Structure and Oxidation of 3,5-DTBC

机译：席夫碱和还原席夫碱配体的铜（II）配合物：弱配位磺酸盐基团对3,5-DTBC结构和氧化的影响

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The copper(II) complexes of the Schiff-base ligands H_2Sams and H_2Saes and the reduced Schiff-base ligands H_2Sam and H_2Sae formed between salicylaldehyde and aminometh-anesulfonic acid or 2-aminoethanesulfonic acid (taurine) have been synthesized in moderate yields.The solid-state structures of the five dinuclear complexes,[Cu_2(Sams)_2(H_2O)_2] (1),[Cu_2(Sam)_2(H_2O)_2] centre dot H_2O (2),[Cu_2(Saes)_2(H_2O)_2] centre dot 2H_2O (3),[Cu_2(Sae)_2] centre dot 2H_2O (4),and [Cu_2(Sae)_2(DMF)_2] centre dot 2DMF (5),have been determined by X-ray crystallography,showing that the Cu~(II) centers have distorted square-pyramidal geometry.The Schiff-base copper complexes 1 and 3 have hydrogen-bonded 2D sheet structures while the reduced Schiff-base complexes 4 and 5 display a 2D coordination network and a hydrogen-bonded 2D structure respectively.All these complexes have been investigated for their catecholase activity and activity measurements have been compared with those of dinuclear copper(II) complexes of similar ligands obtained with carboxylate analogues of the corresponding sulfonic acids;these studies show that 4 has significantly higher activity.Further,a strong antiferromagnetic interaction between Cu~(II) ions in dimeric complexes 1 [J=-9.04(2) cm~(-1)],3 [J=-272(4) cm~(-1)),and 4 [J=-237(4) cm~(-1)] has been observed.
机译：已经适度地合成了席夫碱配体H_2Sams和H_2Saes以及水杨醛和氨基甲基磺酸或2-氨基乙磺酸（牛磺酸）之间形成的席夫碱配体H_2Sam和H_2Sae的铜（II）配合物。 [Cu_2（Sams）_2（H_2O）_2]（1），[Cu_2（Sam）_2（H_2O）_2]中心点H_2O（2），[Cu_2（Saes）_2（H_2O） ）_2]中心点2H_2O（3），[Cu_2（Sae）_2]中心点2H_2O（4）和[Cu_2（Sae）_2（DMF）_2]中心点2DMF（5）已通过X射线确定晶体学研究表明，Cu〜（II）中心具有扭曲的方锥几何形状。席夫碱铜配合物1和3具有氢键键合的2D片状结构，而还原席夫碱铜配合物4和5具有2D配位网络，对所有这些配合物的儿茶酚酶活性进行了研究，并将活性测量结果与双核copp进行了比较与相应磺酸的羧酸类似物得到的类似配体的er（II）配合物;这些研究表明4具有明显更高的活性。此外，二聚配合物中的Cu〜（II）离子之间有很强的反铁磁相互作用[J = -9.04 （2）cm〜（-1）]，3 [J = -272（4）cm〜（-1）），4 [J = -237（4）cm〜（-1）]。

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