Silicon-based organometallic dendritic macromolecules containing {eta(6)-(organosilyl)arene}chromium tricarbonyl moieties

Novel organosilicon dendrimers peripherally functionalized with aromatic rings, Si[(CH2)(3)Si(CH3)(2)C6H5](4) (G1Ph(1)) and Si[(CH2>Si-3(CH3)((CH2)(3)Si(CH3)(2)C6H5)(2)](4) (G2Ph(1)), have been constructed employing a divergent synthetic approach. The pi-coordinating ability of these surface located arene rings towards transition metals has allowed the synthesis of a new family of organometallic dendritic macromolecules 1-3, containing eta(6)-coordinated Cr(CO)(3) moieties at the periphery of organosilicon dendritic cores.