HYDROGENATION CATALYTIC ACTIVITY OF SUBSTITUTED CYCLOPENTADIENYL TITANIUM COMPLEXES ANCHORED ON POLYSILOXANES PREPARED BY A SOL-GEL PROCEDURE

A series of ramethylcyclopentadienyl)alkyl]methylethoxysilanes of gene ral formula C-5(CH3)(4)H(CH2)(n)Si(CH3)(k)(OCH2CH3)(3-k) (n = 1, k = 0 -2; n = 2, k = 1; n = 3, k = 0, 2) has been synthesized. Pentamethylcy clopentadiene - containing polysiloxanes have been prepared from these functionalizing agents and tetraethoxysilane by a sol-gel procedure a nd characterized by C-13 CP MAS solid-state NMR spectroscopy. Polysilo xane-anchored cyclopentadienyl - and pentamethylcyclopentadienyl-titan ium complexes have been obtained by deprotonation of a polysiloxane (n - 1, k = 0) followed by reaction with CpTiCl(3) and CpTiCl3. The anc hored complexes were catalytically active in the hydrogenation of 1-oc tene. Their structure was examined by solid-state NMR and X-ray photoe lectron spectroscopy.