Synthesis, crystal structure and catecholase activity of a Ni(II) complex derived from a tetradentate Schiff base ligand

Journal of Chemical Sciences

Latibuddin Thander²  Chia -Her Lin¹  Merry Mitra⁴  Amrita Ghosh³  Rajarshi Ghosh2⁴  Pradipta Kumar Basu³ 

[1] Department of Chemistry, Chung Yuan Christian University, Chung Li, Taiwan 32023, Republic of China$$;Department of Chemistry, HooghlyMohsin College, Chinsurah, Hooghly 712 101, India$$;Department of Chemistry, Durgapur Government College, Durgapur, Burdwan 713 214, India$$;Department of Chemistry, The University of Burdwan, Burdwan 713 104, India$$

关键词: Nickel(II);    Schiff base;    X-ray structure;    Catecholase activity.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

A new nickel(II) complex [Ni(L)] (1) [H2L = 1,1′-(1E,1′E)-(propane-1,3-diylbis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)dinaphthalen-2-ol] was synthesized and X-ray crystallographically characterized. 1 crystallizes in orthorhombic crystal system with Cmc21 space group. The unit cell dimensions of the crystal are a = 30.6345(4)Å, b = 8.45340(10)Å, c = 7.75180(10)Å. Structural analysis reveals a tetradentate chelation behaviour of the dianionic ligand H2L having a distorted square planar geometry around Ni(II) with NiN2O2 chromophore in 1. The title complex 1 behaves as an effective catalyst towards oxidation of 3,5-ditertiarybutyl catechol (3,5-DTBC) in acetonitrile to its corresponding quinone derivative in air. The reaction follows first-order reaction kinetics with rate constant 4.28 × 10−5 min-1. The reaction follows Michaelis-Menten enzymatic kinetics with a turnover number of (𝐾𝑐𝑎𝑡) 140.72 h-1 in acetonitrile.

【 授权许可】

Unknown