AI Article Synopsis
- The reaction between phosphanyl-terminated carbosilane dendrimers and [RuCl(2)(p-cymene)](2) leads to the attachment of RuCl(p-cymene) groups on the dendrimers' surface.
- The chloride ligands can be replaced by organic bases like pyridine, resulting in new cationic metallodendrimers.
- Ruthenodendrimers were tested for catalytic activity in the transfer hydrogenation of cyclohexanone and showed comparable performance to some mononuclear ruthenium(ii) complexes.
Article Abstract
The reaction of a series of phosphanyl-terminated carbosilane dendrimers displaying only one phosphorus ligand per arm with [RuCl(2)(p-cymene)](2) resulted in the grafting of RuCl(p-cymene) moieties on the periphery of the dendrimer. In these species, the chloride ligand is easily displaced by the organic bases pyridine, 4-cyanopyridine and 4,4[prime or minute]-bipyridine to afford new cationic metallodendrimers. NMR studies have confirmed the chirality of the ruthenium centre. The species containing 4,4[prime or minute]-bipyridine reacts through the uncoordinated pyridyl nitrogen with a new equivalent of [RuCl(2)(p-cymene)](2) or [RhCl(CO)(2)](2) to lead to homo- or hetero-bimetallic layer-containing dendrimeric systems. The ruthenodendrimers were tested as catalysts in the transfer hydrogenation of cyclohexanone by propan-2-ol and their activity compared with that of some analogous mononuclear ruthenium(ii) complexes.
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