Preparation, Properties, and Catalytic Application of Polymer-Bound Ru(III) Complexes

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Abstract
Styrene-divinylbenzene copolymer with 2 and 5% crosslinking was chloromethylated by HCl and HCHO using AlCl3 as the catalyst. Polymer-bound Ru(III) complex catalysts were synthesized by sequential attachment of 1,2-diaminopropane to the copolymer beads followed by treatment with a metal salt. The catalysts were characterized by using various techniques: FT-IR, SEM, EPR, NMR, ESCA, TGA, and UV-Vis reflectance spectroscopy. Other physicochemical properties were determined: surface area by the BET method, swelling studies with different solvents, and moisture content. The catalytic behavior of the prepared catalysts was tested for hydrogenation of cyclohexene as a model reaction. The influence on catalytic behavior of various parameters was studied: temperature, concentration of catalyst and substrate, quantity of solvent, and the use of various solvents. The recycling efficiency of the catalysts was also studied. A probable reaction mechanism is proposed.

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