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

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.

Keywords

Monopyridine clusters Hexapyridine clusters Cluster-cored organometallic stars Dendrons Dendrimers . Faculdade de Ciências Exatas e da Engenharia

URI

http://hdl.handle.net/10400.13/2388

Citation

Méry, D., Plault, L., Ornelas, C., Ruiz, J., Nlate, S., Astruc, D., ... & Perrin, C. (2006). 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. Inorganic chemistry, 45(3), 1156-1167.