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Coordination behavior and binding properties of (3,5-dimethyl- 1H -pyrazol-1-yl)ethanol with Cu(II), Zn(II), Cd(II), and Pb(II) metals

2013; Taylor & Francis; Volume: 66; Issue: 9 Linguagem: Inglês

10.1080/00958972.2013.784904

ISSN

1029-0389

Autores

Martha W. Njoroge, Stephen O. Ojwach, George S. Nyamato, Bernard Omondi, James Darkwa,

Tópico(s)

Chemical Thermodynamics and Molecular Structure

Resumo

The coordination chemistry and binding properties of (3,5-dimethyl-1H-pyrazol-1-yl)ethanol (L1) with Cu(II), Zn(II), Cd(II), and Pb(II) have been investigated. Reactions of L1 with Zn(II) and Cd(II) nitrate or chloride salts produced the corresponding monometallic and bimetallic complexes [Zn(NO3)2(L1)] (1), [ZnCl2(L1)] (2), [Cd(NO3)2(L1)2] (3) and [Cd2Cl2(μ-Cl2)(L1)2] (4). Solid-state structures of 3 and 4 confirmed the bidentate coordination mode of L1. The extraction efficiency of the metals by L1 is dependent upon the size and electronic properties of the metal. Binding affinities of 92% for Cu(II), 90% for Zn(II), 70% for Pb(II), and 61% for Cd(II) were observed.

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