title: Ridge-tile-like chiral topology: synthesis, resolution, and complete chiroptical characterization of enantiomers of edge-sharing binuclear square planar complexes of Ni(II) bearing achiral ligands.
abstract: Binuclear square planar Ni(II) complexes are described, formed by two tridentate ligands with two imine-nitrogens coordinating two nickel atoms. Such complexes are synthetically readily available with great structural variety and present new types of ridge-tile-like chiral compounds that are reasonably stable in the appropriate "bent" conformation. Enantiomerically pure samples of these compounds have been obtained for the first time using HPLC with a chiral stationary phase. Absolute configurations and chiroptical properties are fully characterized by ECD, VCD, ORD spectroscopy, and theoretical calculations. These new compounds with ridge-tile-like chiral topology are configurationally reasonably stable [DeltaG(double dagger) = 121.4 kJ mol(-1), t(1/2) = 14.9 h (78 degrees C, ethanol)], and therefore their chemistry, physical properties, and applications can be systematically studied.
authors.affiliation: Institute of Biorganic Chemistry and Petrochemistry, National Academy of Sciences of the Ukraine, Murmanska Street 1, Kyiv-94 02660, Ukraine. vadimsoloshonok@gmail.com
authors.forename: Vadim A
authors.initials: VA
authors.lastname: Soloshonok
authors.forename: Taizo
authors.initials: T
authors.lastname: Ono
authors.forename: Hisanori
authors.initials: H
authors.lastname: Ueki
authors.forename: Nicolas
authors.initials: N
authors.lastname: Vanthuyne
authors.forename: Teodor Silviu
authors.initials: TS
authors.lastname: Balaban
authors.forename: Jochen
authors.initials: J
authors.lastname: Bürck
authors.forename: Heike
authors.initials: H
authors.lastname: Fliegl
authors.forename: Wim
authors.initials: W
authors.lastname: Klopper
authors.forename: Jean-Valère
authors.initials: JV
authors.lastname: Naubron
authors.forename: Tam T T
authors.initials: TT
authors.lastname: Bui
authors.forename: Alex F
authors.initials: AF
authors.lastname: Drake
authors.forename: Christian
authors.initials: C
authors.lastname: Roussel
mesh_terms: D018360:Crystallography, X-Ray; D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D009532:Nickel / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D008024:Ligands; D009532:Nickel