title: Pairwise assembly of organopalladium(II) units with cyanurato(3-) and trithiocyanurato(3-) ligands: formation of chiral Pd12, Pd10, and Pd9 cage-molecules.
abstract: The o-palladated, chloro-bridged dimers [Pd{2-phenylpyridine(-H)}-μ-Cl]2 and [Pd{N,N-dimethylbenzylamine(-H)}-μ-Cl]2 react with cyanuric acid in the presence of base to afford closed, chiral cage-molecules in which 12 organo-Pd(II) centers, located in pairs at the vertices of an octahedron, are linked by four tetrahedrally arranged cyanurato(3-) ligands. Incomplete (Pd10) cages, having structures derived from the corresponding Pd12 cages by replacing one pair of organopalladium centers with two protons, have also been isolated. Reaction of [Pd{2-phenylpyridine(-H)}-μ-Cl]2 with trithiocyanuric acid gives an entirely different and more open type of cage-complex, comprising only nine organopalladium centers and three thiocyanurato(3-) ligands: cage-closure in this latter system appears to be inhibited by steric crowding of the thiocarbonyl groups.
authors.affiliation: Department of Chemistry, University of Reading , Whiteknights, Reading, RG6 6AD, United Kingdom.
authors.forename: Claire A
authors.initials: CA
authors.lastname: Murray
authors.forename: Christine J
authors.initials: CJ
authors.lastname: Cardin
authors.forename: Barnaby W
authors.initials: BW
authors.lastname: Greenland
authors.forename: Andrew
authors.initials: A
authors.lastname: Swift
authors.forename: Howard M
authors.initials: HM
authors.lastname: Colquhoun