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Scientific article
English

Synthesis of planar five-connected nodal ligands

Published inChemistry, vol. 15, no. 20, p. 5012-5022
Publication date2009
Abstract

Synthetic routes to a penta(4-pyridyl)cyclopentadienyl ligand are explored. The most successful route uses a palladium-catalysed pentapyridation of di(tert-butyl)phosphinoferrocene by using a procedure developed by Hartwig. The same method allows the synthesis of cyclopentadiene ligands substituted with 4-benzaldehydes or 4-phenylthiols. The pyridine ligands are formally five-connected nodes that may be linked by linear coordination metals to give closed spherical complexes of composition [(metal)(30)(ligand)(12)] as shown by molecular modelling. Experiment shows that the ligand complexes copper(I) and silver(I) with the expected 1:2.5 stoichiometry, and the (1)H NMR spectrum of the resulting product shows the ligands to be equivalent. NMR diffusion and light-scattering measurements support the formation of a species with a hydrodynamic radius of the order of 15 A, in agreement with the modelling studies. The resulting complex would be topologically identical to the C(60) fullerene structure.

Keywords
  • Coordination compounds
  • Copper
  • Cyclopentadienyl ligands
  • Molecular cages
  • Silver
  • Supramolecular chemistry
Citation (ISO format)
OMS, Olivier et al. Synthesis of planar five-connected nodal ligands. In: Chemistry, 2009, vol. 15, n° 20, p. 5012–5022. doi: 10.1002/chem.200802617
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ISSN of the journal0947-6539
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Creation09/01/2009 5:01:00 PM
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