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Studies were performed on the catalytic activity for olefin hydrosilylation shown by three rhodium complexes, [{Rh(μ-OSiMe 3 )(cod)} 2 ] (I), [{Rh(μ-Cl)(cod)} 2 ] (II) and [RhCl(PPh 3 ) 3 ] (III), and three platinum complexes, [Pt(PPh 3 ) 4 ] (IV), [Pt(PPh 3 ) 2 Cl 2 ] (V) and PtCl 4 (VI), immobilized in a series of different anion-containing morpholinium ionic liquids. The effect of the kind of anion (its nucleophilic character) on the activity, stability and possibility of a catalytic system with multiple uses in the hydrosilylation process has been established. In the case of the best systems it was possible to reuse the same catalyst sample 10 times almost without any decrease in the activity and a TON value over 99 000 was obtained.

The effect of the morpholinium ionic liquid anion on the catalytic activity of Rh (or Pt) complex–ionic liquid systems in hydrosilylation processes