Anion Selectivity in Zwitterionic Amide??Functionalised Metal Salt Extractants

…, L Li, AJ Blake, C Wilson, SR Collinson…

Index: Galbraith, Stuart G.; Wang, Qiang; Li, Li; Blake, Alexanders; Wilson, Claire; Collinson, Simon R.; Lindoy, Leonard F.; Plieger, Paul G.; Schroeder, Martin; Tasker, Peter A. Chemistry - A European Journal, 2007 , vol. 13, # 21 p. 6090 - 6107

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Citation Number: 28

Abstract

Abstract Amide-functionalised salen ligands capable of extracting metal salts have been synthesised and characterised. Single-crystal X-ray structure determinations of complexes of NiSO 4,[Ni (L)(SO 4)], confirm that the ionophores are in a zwitterionic form with Ni II bound in the deprotonated salen moiety and the SO 4 2− ion associated with protonated pendant N′-amidopiperazine groups. Treatment of [Ni (L)(SO 4)] with base removes the protons ...