title: Outer-sphere amidopyridyl extractants for zinc(ii) and cobalt(ii) chlorometallates.
abstract: Protonated amidopyridyl ligands show high selectivity for the extraction of [CoCl(4)](2-) or [ZnCl(4)](2-) over chloride ion into organic media via the formation of N-H and C-H hydrogen-bond donors to the outer coordination spheres of the chlorometallates.
authors.affiliation: University of Edinburgh, School of Chemistry, West Mains Road, Edinburgh, UK EH9 3JJ.
authors.forename: Ross J
authors.initials: RJ
authors.lastname: Ellis
authors.forename: Jy
authors.initials: J
authors.lastname: Chartres
authors.forename: Kathryn C
authors.initials: KC
authors.lastname: Sole
authors.forename: Timothy G
authors.initials: TG
authors.lastname: Simmance
authors.forename: Christine C
authors.initials: CC
authors.lastname: Tong
authors.forename: Fraser J
authors.initials: FJ
authors.lastname: White
authors.forename: Martin
authors.initials: M
authors.lastname: Schröder
authors.forename: Peter A
authors.initials: PA
authors.lastname: Tasker