Search for differences in the complex forming abilities of alkylimidazoles and making use of them

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Search for differences in the complex forming abilities of alkylimidazoles and making use of them

Journal Title: CHEMIK nauka-technika-rynek - Year 2011, Vol 65, Issue 4

Abstract

It was shown that the alkalinity of the molecules belonging to different homologous series alkylimidazoles depends on the position of alkyl substituents in the ring and increases linearly with increasing length. Alkalinity decreases in the series: 1,2,4-trialkylimidazole> 1,2-dialkylimidazole > 1,4 – dialkylimidazole > 2 - alkylimidazole> 1-alkylimidazole. The alkalinity of the ligands is of great importance in the distribution of metals. The liquid-liquid partition method was used to determined the stability constants of Co(II ), Ni(II ), Cu(II ), and Zn(II ) complexes with 1-alkyl- and 1-alkyl-2-methylimidazoles in aqueous solutions. It was shown that the formation of complexes with transition metals depends on two effects –steric or hydrophobic of ligands (alkylimidazole). These effects can be used for the selective separation of Co(II ) from Ni(II ), Cu(II ) from Co(II ) and Ni(II ), Zn(II ), Cd(II ) or other cations, depending on the initial mixture composition.

Authors and Affiliations

Beniamin Lenarcik, Elżbieta Radzymińska-Lenarcik

Keywords

EP ID EP85398
DOI -
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