Synthesis of planar five-connected nodal ligands

Article Article scientifique Article Synthesis of planar five-connected nodal ligands eng 2009 author Oms Olivier author Jarrosson Thibaut author Tong Lok Hang 669209 author Vaccaro Andréa 638078 author Bernardinelli Gérald Hugues 24765 author Williams Alan Francis 25350 5012-5022 10.1002/chem.200802617 19373792 0947-6539 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. Coordination compounds Copper Cyclopentadienyl ligands Molecular cages Silver Supramolecular chemistry Dewey 540 40 Département de chimie minérale, analytique et appliquée 145 false Chemistry 15 20 20f678e4-2929-47fa-9d67-e36a8514ff70 Article (Accepted version) Restricted fulltext.pdf 1021505 application/pdf restrictedAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée

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Synthesis of planar five-connected nodal ligands	Chemistry			2009	634	0

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Tong, Lok Hang