Abstract

Copper(II) complexes of 2-hydroxyacetophenone-N(4)-cyclohexylthiosemicarbazone (H₂L¹) and 2-hydroxyacetophenone-N(4)-phenylthiosemicarbazone (H₂L²) have been synthesized and characterized by different physicochemical techniques like magnetic studies and electronic, infrared and EPR spectral studies. [(CuL¹)₂] (1) is a dinuclear complex having four coordination around copper(II) with distorted square planar geometry. The two individual dinuclear complexes are interconnected through two bifurcated classical hydrogen bond interactions producing a sheet-like structure along b axis. [(CuL²)₂]·¹/₂H₂O (2) also has a dimeric structure. The thiosemicarbazones bind to the metal as dianionic ONS donor ligand in all the complexes, except in the complexes [Cu(HL¹)Cl]·2H₂O (3), [Cu(HL¹)Br]·4H₂O (4) and [Cu(HL¹)NO₃]·C₂H₅OH(H₂O) (5), where the ligand moieties are coordinated as monoanionic (HL^¯) ones. Complexes [CuL¹dmbipy] (6), [CuL²dmbipy]·3H₂O (7), [CuL²bipy]·H₂O (8) and [CuL²phen]·2C₂H₅OH (9) are heterocyclic base adducts.

Graphic Abstract

The synthesis and characterization of monomeric and dimeric Cu(II) complexes with 2-hydroxyacetophenone-N(4)-cyclohexyl/phenyl substituted ONS donor ligands is described. It also reports the crystal structure of a novel binuclear Cu(II) complex with oxygen bridging and its interesting coordination. This compound [CuL¹]₂ is a rare example of copper(II)-thiosemicarbazone complex with oxygen bridging structure.

中文翻译：

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N-（4-）-苯乙酮衍生的N（4）-取代的硫代半缩氮酮的Cu（II）配合物的结构和光谱表征：双核Cu（II）配合物的晶体结构

摘要

合成了2-羟基苯乙酮-N（4）-环己基硫代半碳a（H ₂ L ¹）和2-羟基苯乙酮-N（4）-苯基硫代半碳zone（H ₂ L ²）的铜（II）配合物。研究以及电子，红外和EPR光谱研究。[（CuL ¹）₂ ]（1）是在具有扭曲的正方形平面几何形状的铜（II）周围具有四个配位的双核络合物。两个单独的双核络合物通过两个分叉的经典氢键相互作用相互连接，沿b轴产生片状结构。[（CuL ²）₂ ]· ¹/ ₂ H ₂ O（2）也具有二聚体结构。在所有络合物中，除[Cu（HL ¹）Cl]·2H ₂ O（3），[Cu（HL ¹ Br）·4H ₂ O（4）外，硫代半咔唑酮均作为阴离子ONS供体配体与金属结合。）和[铜（HL ¹）NO ₃ ]·C ₂ H ^ ₅ OH（H ₂ O）（5），其中，所述配体部分被协调为单阴离子（HL ^¯）的。配合物[CuL ¹ dmbipy]（6），[CuL ² dmbipy]·3H₂ O（7），[CuL ² bipy]·H ₂ O（8）和[CuL ² phen]·2C ₂ H ₅ OH（9）是杂环碱加合物。

图形摘要

描述了具有2-羟基苯乙酮-N（4）-环己基/苯基取代的ONS供体配体的单体和二聚体Cu（II）配合物的合成和表征。它还报道了一种具有氧桥联作用的新型双核Cu（II）配合物的晶体结构及其有趣的配位作用。该化合物[CuL ¹ ] ₂是具有氧桥联结构的铜（II）-硫代半碳杂complex络合物的罕见例子。