title: Dinuclear zinc(II) complexes of symmetric Schiff-base ligands with extended quinoline sidearms.
abstract: The synthesis of two 2-formylquinolines is reported via the Skraup method followed by SeO(2) oxidation. Each aldehyde is condensed with (1R,2R)-diaminocyclohexane and (R)-BINAM, yielding four enantiomerically-pure bis(imine-quinoline) ligands. The neutral ligands are reacted with ZnCl(2) to give complexes with bis(bidentate) coordination of ZnCl(2) units. X-Ray structural characterization of three complexes shows them to have a single-stranded helical motif, with M helicity, except in one case where a 1:1 mixture of M and P helices is seen. The ligands and complexes are further characterized spectroscopically by solution (1)H and (13)C NMR, UV-vis and ECD.
authors.affiliation: Department of Chemistry, Kansas State University, 111 Willard Hall, Manhattan, KS 66506, USA.
authors.forename: Dipesh
authors.initials: D
authors.lastname: Prema
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Wiznycia
authors.forename: Benjamin M T
authors.initials: BM
authors.lastname: Scott
authors.forename: Jessica
authors.initials: J
authors.lastname: Hilborn
authors.forename: John
authors.initials: J
authors.lastname: Desper
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Levy