SILICON-BASED ORGANOMETALLIC DENDRITIC MACROMOLECULES CONTAINING (ETA(6)-(ORGANOSILYL)ARENE)CHROMIUM TRICARBONYL MOIETIES

Novel organosilicon dendrimers peripherally functionalized with aromat ic 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 empl oying a divergent synthetic approach. The pi-coordinating ability of t hese surface located arene rings towards transition metals has allowed the synthesis of a new family of organometallic dendritic macromolecu les 1-3, containing eta(6)-coordinated Cr(CO)(3) moieties at the perip hery of organosilicon dendritic cores.