Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, Kerala, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2010 Aug;76(3-4):322-7. doi: 10.1016/j.saa.2010.03.011. Epub 2010 Apr 1.
Five copper(II) complexes CuLCl.CuCl(2).4H(2)O (1), [CuLOAc] (2), CuLNO(3) (3), [CuLN(3)] (4) and [CuLNCS].3/2H(2)O (5) of di-2-pyridyl ketone-N(4)-phenyl-3-semicarbazone (HL) were synthesized and characterized by elemental analyses and electronic, infrared and EPR spectral techniques. In all these complexes the semicarbazone undergoes deprotonation and coordinates through enolate oxygen, azomethine and pyridyl nitrogen atoms. All the complexes are EPR active due to the presence of an unpaired electron. EPR spectra of all the complexes in DMF at 77K suggest axial symmetry and the presence of half field signals for the complexes 1 and 3 indicates dimeric structures.
合成了五种铜(II)配合物 [CuLCl](2).CuCl(2).4H(2)O(1)、[CuLOAc](2)、[CuLNO(3)](2)(3)、[CuLN(3)](4)和[CuLNCS].3/2H(2)O(5),配体为二吡啶酮-N(4)-苯基-3-缩氨基硫脲(HL),并用元素分析、电子光谱、红外光谱和 EPR 光谱技术对其进行了表征。在所有这些配合物中,缩氨基硫脲经历去质子化,并通过烯醇氧、亚甲胺和吡啶氮原子进行配位。由于存在未成对电子,所有配合物均具有 EPR 活性。在 77K 的 DMF 中,所有配合物的 EPR 光谱均呈轴向对称,而配合物 1 和 3 中的半磁场信号表明其具有二聚体结构。