title: Self-discriminating self-assembly of dinuclear heterochiral rhombs from Tröger's base derived bis(pyridyl) ligands.
abstract: Five racemic dissymmetric bis(pyridyl) ligands based on 2,8- or 3,9-difunctionalised Tröger's base derivatives have been synthesised. Only those derived from a 2,8-difunctionalised scaffold were found to undergo selective self-assembly to discrete self-assembled dinuclear metallosupramolecular aggregates of rhomboid shape upon coordination to cis-protected Pd(2+) or Pt(2+) ions, as evidenced by ESI mass spectrometry, NMR spectroscopy and single-crystal X-ray diffraction. Interestingly, these processes were found to be highly diastereoselective leading to the formation of C(2v)-symmetric heterochiral assemblies in a self-discriminating manner.
authors.affiliation: University of Bonn, Kekulé-Institute of Oganic Chemistry and Biochemistry, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany.
authors.forename: Torsten
authors.initials: T
authors.lastname: Weilandt
authors.forename: Ulf
authors.initials: U
authors.lastname: Kiehne
authors.forename: Jens
authors.initials: J
authors.lastname: Bunzen
authors.forename: Gregor
authors.initials: G
authors.lastname: Schnakenburg
authors.forename: Arne
authors.initials: A
authors.lastname: Lützen