Abstract
Development of a computer controlled apparatus for measurement of gas uptake at elevated temperatures and pressures has made possible a study of the kinetics of NBR hydrogenation at conditions approaching those that are used in commercial operations. Complexes of the form Ru(X)Cl(CO)L 2 where X = H or β-styryl (CH CH(Ph)) and L is a bulky phosphine such as tricyclohexyl- or triisopropyl-phosphine are excellent catalysts for the hydrogenation of CC in a variety of polymers and are superior to other Ru complexes for the hydrogenation of CC in nitrile-butadiene rubber. This report describes comparative studies using these complexes for the hydrogenation of CC in various polymer and small molecule substrates. Also presented are complete details of an in depth mechanistic study into the hydrogenation of NBR catalyzed by the complex Ru(CHCH(Ph))Cl(CO)(PCy 3) 2.
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