Kinetic studies of the impact of thiocyanate moiety on the catalytic properties of Cu(II) and Fe(III) complexes of a new Mannich base

被引：8

作者：

Ayeni, Ayowole O. ^{[1
,2
]}

Watkins, Gareth M. ^{[1
]}

机构：

[1] Rhodes Univ, Dept Chem, Grahamstown, South Africa

[2] Obafemi Awolowo Univ, Dept Chem, Ife, Nigeria

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2018年 / 1158卷

关键词：

Mannich base; Thiocyanate; Catecholase activity; Copper(II); Iron(III); CATECHOLASE ACTIVITY; DICOPPER(II) COMPLEXES; COPPER(II) COMPLEXES; CHLORIDE COMPLEXES; CRYSTAL-STRUCTURES; NICKEL(II); MODELS; TYROSINASE; COBALT(II); OXIDASES;

D O I：

10.1016/j.molstruc.2017.12.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Four new metal complexes of a novel Mannich base 5-methyl-2-((4-(pyridin-2-yl)piperazin-1-yl)methyl) phenol (HL) have been prepared. The compounds were characterized by an array of analytical and spectroscopic methods including Nuclear Magnetic Resonance, Infra-red and UV Visible spectroscopy. Compounds 1-4 behaved as effective catalysts towards the oxidation of 3,5-di-tert-butylcatechol (3,5-DTBC) to its corresponding quinone in the presence of molecular oxygen in DMF solution while compound 4 proved to be the best catalyst with a turnover rate of 17.93 +/- 1.10 h(-1) as other complexes showed lower rates of oxidation. Also with the exception of dinuclear iron complex (4); thiocyanate containing Cu(II) complex exhibited lower catecholase activity compared to the Cu(II) complex without it. (C) 2017 Published by Elsevier B.V.

引用

页码：19 / 25

页数：7

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