title: From simple monopyridine clusters [Mo6Br13(Py-R)][n-Bu4N] and hexapyridine clusters [Mo6X8(Py-R)6][OSO2CF3]4 (X = Br or I) to cluster-cored organometallic stars, dendrons, and dendrimers.
abstract: Hexasubstitution of apical triflate ligands in the octahedral clusters [M]2[Mo6X8(CF3SO3)6] (M = n-Bu4N or Cs, X = Br or I) and monosubstitution in [n-Bu4N]2[Mo6Br13(CF3SO3)] was carried out in tetrahydrofuran at 60 degrees C with simple pyridines and then extended to organometallic pyridines, yielding cluster-cored stars, and to dendronic polyallyl- and polyferrocenylpyridines, yielding cluster-cored polyallyl and polyferrocenyl dendrimers and dendrons. The orange pyridine-substituted clusters, whose pyridine protons are deshielded in 1H NMR (a practical tool for characterization), are air-stable and thermally stable with simple pyridines, light- and air-sensitive with organometallic pyridines, and air-fragile and thermally fragile with large dendronized pyridines.
authors.affiliation: Nanosciences and Catalysis Group, LCOO, UMR CNRS No. 5802, Université Bordeaux 1, 351 cours de la Libération, 33405 Talence Cedex, France.
authors.forename: Denise
authors.initials: D
authors.lastname: Méry
authors.forename: Lauriane
authors.initials: L
authors.lastname: Plault
authors.forename: Cátia
authors.initials: C
authors.lastname: Ornelas
authors.forename: Jaime
authors.initials: J
authors.lastname: Ruiz
authors.forename: Sylvain
authors.initials: S
authors.lastname: Nlate
authors.forename: Didier
authors.initials: D
authors.lastname: Astruc
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Blais
authors.forename: João
authors.initials: J
authors.lastname: Rodrigues
authors.forename: Stéphane
authors.initials: S
authors.lastname: Cordier
authors.forename: Kaplan
authors.initials: K
authors.lastname: Kirakci
authors.forename: Christiane
authors.initials: C
authors.lastname: Perrin