A detailed study of the hydrogenation of nitrile-butadiene rubber and other substrates catalyzed by Ru(II) complexes
作者:P MARTIN
DOI:10.1016/s1381-1169(97)00102-7
日期:1997.12
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 beta-styryl (CH=CH(Ph)) and L is a bulky phosphine such as tricyclohexyl- or triisopropyl-phosphine are excellent catalysts for the hydrogenation of C=C in a variety of polymers and are superior to other Ru complexes for the hydrogenation of C=C in nitrile-butadiene rubber. This report describes comparative studies using these complexes for the hydrogenation of C=C 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(CH=CH(Ph))Cl(CO)(PCy3)(2). (C) 1997 Elsevier Science B.V.
Vinyl and carbene ruthenium(<scp>ii</scp>) complexes from hydridoruthenium(<scp>ii</scp>) precursors
作者:Stefan Jung、Carsten D. Brandt、Justin Wolf、Helmut Werner
DOI:10.1039/b314425a
日期:——
hydrido compounds [RuHCl(CO)(L)2][L = PiPr3 (1), PCy3 (2)] with HC(triple bond)CR (R = H, Ph, tBu) afforded by insertion of the alkyne into the Ru-H bond the corresponding vinyl complexes [RuCl(CHCHR)(CO)(L)2], 3-8, which upon protonation with HBF4 gave the cationic five-coordinated ruthenium carbenes [RuCl(CHCH2R)(CO)(L)2]BF4, 9-14. Subsequent reactions of the carbene complexes with PR3(R = Me, iPr)