ABSTRACT. Over the last few years considerable attention has been devoted to the study of Schiff base complexes of metal(II) containing nitrogen, oxygen and sulfur donor ligands due to their diverse biological activities. Therefore, the Schiff base thiosemicarbazone derivatives of 2-(2-hydroxy-3-methoxybenzylidene) hydrazine carbothioamide (HL1) and 2-(4-bromo-2-hydroxy-3-methoxybenzylidene) hydrazine carbothioamide (HL2) were synthesized with solvent free technique using silica gel as material support for the reaction. The structures of the precursor’s organic products confirmed with their 1H, 13C NMR, IR and microanalysis data. Six new manganese(II), copper(II), and zinc(II) complexes of HL1 and HL2 2-(2-hydroxy-3-methoxybenzylidene) hydrazinecarbothioamide derivatives with the general formulation [ML1Cl] and [ML2Cl], where M = Mn2+, Cu2+, and Zn2+ were prepared and well discussed by using elemental analyses, magnetic moments, molar conductance, infrared and electronic spectral techniques. The assignments data of spectroscopic analysis confirm that the synthesized thiosemicarbazone Schiff bases of acts as a tridentate ligand as sulfur-oxygen-nitrogen donating atoms. The values of magnetic moments agreed with the data of electronic spectra which both suggested a four-coordination geometry of the synthesized complexes.
KEY WORDS: Schiff base, Thiosemicarbazone, Manganese(II) complex, Copper(II) complex, Zinc(II) complex
Bull. Chem. Soc. Ethiop. 2021, 35(2), 413-424.
DOI: https://dx.doi.org/10.4314/bcse.v35i2.14
摘要:近年来,由于其多样的生物活性,对含有氮、氧和硫配体的金属(II)席夫碱配合物的研究受到了相当多的关注。因此,使用硅胶作为反应材料支持,采用无溶剂技术合成了2-(2-羟基-3-甲氧基苯甲醛基)肼羧硫脲(HL1)和2-(4-溴-2-羟基-3-甲氧基苯甲醛基)肼羧硫脲(HL2)的席夫碱噻唑衍生物。通过1H、13C NMR、IR和微量分析数据确认了前体有机产物的结构。制备了六个新的锰(II)、铜(II)和锌(II)的HL1和HL2 2-(2-羟基-3-甲氧基苯甲醛基)肼羧硫脲衍生物的配合物,其一般公式为[ML1Cl]和[ML2Cl],其中M = Mn2+、Cu2+和Zn2+,并通过元素分析、磁矩、摩尔电导、红外和电子光谱技术进行了充分的讨论。光谱分析的分配数据确认,合成的噻唑衍生物席夫碱作为硫-氧-氮给体原子的三齿配体。磁矩值与电子光谱数据一致,均表明合成配合物的四配位几何结构。
关键词:席夫碱,噻唑衍生物,锰(II)配合物,铜(II)配合物,锌(II)配合物
Bull. Chem. Soc. Ethiop. 2021, 35(2), 413-424.
DOI: https://dx.doi.org/10.4314/bcse.v35i2.14