title: Organogold oligomers: exploiting iClick and aurophilic cluster formation to prepare solution stable Au₄ repeating units.
abstract: A novel synthetic method to create gold based metallo-oligomers/polymers via the combination of inorganic click (iClick) with intermolecular aurophilic interactions is demonstrated. Complexes [PEt3Au]4(μ-N3C2C6H5) (1) and [PPhMe2Au]4(μ-N3C2C6H5) (2) and {[PEt3Au]4[(μ-N3C2)2-9,9-dihexyl-9H-fluorene]}n (8) have been synthesized via iClick. The tetranuclear structures of 1 and 2, induced by aurophilic bonding, are confirmed in the solid state through single crystal X-ray diffraction experiments and in solution via variable temperature NMR spectroscopy. The extended 1D structure of 8 is constructed by aurophilic induced self-assembly. (1)H DOSY NMR analysis reveals that the aurophilic bonds in 1, 2, and 8 are retained in the solution phase. The degree of polymerization within complex 8 is temperature and concentration dependent, as determined by (1)H DOSY NMR. Complex 8 is a rare example of a solution stable higher ordered structure linked by aurophilic interactions.
authors.affiliation: University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, Florida 32611, USA. veige@chem.ufl.edu.
authors.forename: Xi
authors.initials: X
authors.lastname: Yang
authors.forename: Shanshan
authors.initials: S
authors.lastname: Wang
authors.forename: Ion
authors.initials: I
authors.lastname: Ghiviriga
authors.forename: Khalil A
authors.initials: KA
authors.lastname: Abboud
authors.forename: Adam S
authors.initials: AS
authors.lastname: Veige