[(bmpyr) 2{Zn(OC 6H 3(NO 2) 2) 4}]: Influence of an ionic liquid on liquid/liquid extraction of metal ions in a biphasic system

Abstract

The compound [(bmpyr) 2{Zn(OR) 4}] (OR = 2,4-dinitriphenolate) has been prepared from Zn(NO 3) 2·6H 2O and sodium 2,4-dinitrophenolate in a biphasic aqueous ionic liquid (Butyl-methyl-pyrrolidinium trifluoromethylsulfonate [bmpyr][OTf]) system. The presence of the anionic zinc complex in [bmpyr][OTf] is made possible by the exchange of the ionic liquid anions into the aqueous phase for the zinc complex. [(bmpyr) 2{Zn(OR) 4}] was characteri_zed in solution by 13C- and 1H-NMR spectroscopy and in the solid state by crystal structure determination. The zinc complex represents the first type of a zinc complex with more than two phenolate ligands. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.