in toluene toluene soln. of W and Pd compd. (in 2:1 molar ratio) were stirred for 3 h; mixt. was stirred with activated charcoal for 0.5 h, filtered, toluene removed in vac., pentane was added for crystn., recrystd. from toluene/pentane, elem. anal.;

in toluene byproducts: 1,5-cyclooctadiene; react. of educts for 2 d; solvent removed in vac., residue dissolved in ether, cooled to -30°C, pentane was added to the filtrate, crystd. at -30°C, product recrystd. from ether/pentane, elem. anal.;

in toluene

1 equiv. of Pd compd.;