title: Synthesis and structural characterization of tin(II) and zinc(II) derivatives of cyclic alpha-hydroxyketones, including the structures of Sn(maltol)(2), Sn(tropolone)(2), Zn(tropolone)(2), and Zn(hinokitiol)(2).
abstract: Zinc(II) and tin(II) derivatives of maltol (Hmalt), ethylmaltol (HEtmalt), tropolone (Htrop), hinokitiol (Hhino), and kojic acid (Hkoj) have been prepared and characterized, and the crystal structures of M(trop)(2) (M = Zn, Sn), Zn(hino)(2).EtOH, and Sn(malt)(2) have been determined. The Zn(trop)(2) is a polymeric structure in which tropolone has both a bridging and chelating role; zinc(hino)(2) crystallizes as an ethanol adduct of which the structure is a dimeric fragment of the Zn(trop)(2) polymer and in which each metal is "capped" by a molecule of alcohol. The tin complexes are notably air-stable despite adopting monomeric pseudo-trigonal-bipyramidal structures (SnO(4)E; E is a stereochemically active lone electron pair) in which the ligands only chelate a single metal center.
authors.affiliation: Department of Chemistry, University of Bath, Bath BA2 7AY, UK.
authors.forename: M C
authors.initials: MC
authors.lastname: Barret
authors.forename: M F
authors.initials: MF
authors.lastname: Mahon
authors.forename: K C
authors.initials: KC
authors.lastname: Molloy
authors.forename: J W
authors.initials: JW
authors.lastname: Steed
authors.forename: P
authors.initials: P
authors.lastname: Wright