Synthesis, characterization, structure, redox property, antibacterial and catalytic activity of tridentate Schiff base cobalt(III), nickel(II) and palladium(II) complexes

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• 作者：Poulami Pattanayak^a ; ^{pparka@rediffmail.com} ; Jahar Lal Pratihar^b ; ^{jlpr@rediffmail.com} ; Debprasad Patra^c ; Chia-Her Lin^d ; Sobhana Paul^e ; ¹ ; Kausiki Chakraborty^f ; ¹
• 关键词：Crystal structure ; Redox ; Antibacterial activity ; Heck reaction ; DFT
• 刊名：Polyhedron
• 出版年：2013
• 出版时间：4 March, 2013
• 年：2013
• 卷：51
• 期：Complete
• 页码：275-282
• 全文大小：1199 K

文摘

Ligand, HL, 2-((2-(benzylthio)phenylimino)methyl)phenol, upon reaction with Co(NO₃)₃¡¤6H₂O, Ni(OAc)₂¡¤4H₂O and PdCl₂ separately afforded complexes [(L)₂Co]NO₃ (1), [(L)₂Ni] (2) and [(L)PdCl] (3) respectively. The new complexes were characterized by usual spectroscopic studies like UV-Vis, IR and NMR and authenticated by X-ray structure determination on [(L)₂Co]NO₃, [(L)₂Ni]. The analysis of crystal structures revealed that in all the complexes the ligand HL binds the metal center as uni-negative anion; L^? dissociating phenolic proton and offers (O, N, S) tridentate binding mode to the metal. The compound [Co(L)₂]NO₃ is tested for in vitro antibacterial activity. Complex 3, acts as a catalyst in Heck reaction for a number of substrates. Complexes 1 and 2 exhibited a quasi reversible oxidative responses at 0.97 and 0.85 V, respectively, versus SCE. The electronic spectra and redox properties of the complexes have been explained with DFT computation.