Synthesis and characterization of new thiazole-based Co(II) and Cu(II) complexes; therapeutic function of thiazole towards COVID-19 in comparing to current antivirals in treatment protocol
作者:Samira A. Almalki、Tahani M. Bawazeer、Basim Asghar、Arwa Alharbi、Meshari M. Aljohani、Mohamed E. Khalifa、Nashwa El-Metwaly
DOI:10.1016/j.molstruc.2021.130961
日期:2021.11
Two thiazole-based complexes were prepared from Co(II) and Cu(II) ions. The new ligand and its complexes were fully characterized by analytical and spectral techniques. The ligand behaved as a neutral tridentate in its keto-form towards the metals via O(8), O(10) and O(18) atoms. This was suggested based on the lower shift of υ(CHO), υ(CO)amide and υ(CO) vibrations. The electronic transitions in Co(II)-HL
由 Co(II) 和 Cu(II) 离子制备了两种基于噻唑的配合物。新配体及其配合物通过分析和光谱技术得到了充分表征。该配体通过O(8)、O(10) 和 O(18) 原子以酮形式对金属表现出中性三齿。这是基于 υ(CH O)、υ( CO)酰胺和 υ( CO) 振动的较低位移而提出的。Co(II)-HL 和 Cu(II)-HL 配合物中的电子跃迁显示为dd - 跃迁属于4 T 1g → 4 A 2g (F) & 4 T 1g (F) → 4 T 1g (P) 和2 Eg → 2 T 2 g,分别在两个配合物中。Cu(II)-HL配合物的ESR谱按以下顺序显示g因子;g // (2.1740)>g ⊥(2.0935)>2.0023,与八面体几何一致。在价双 zeta 极化基组 (6-31G*) 下通过 DFT/B3LYP 方法执行几何优化,以确认结构形式和键合模式。O(8)、O(10) 和 O(18)