in toluene 3-tert-butyltitanacyclobutane and diphenylketene in toluene is heated at 80°C for 10 min, solids pptd.; solution removed, solid is washed (pentane, ether), dried overnight, recrystn. (ether, CH2Cl2 or toluene); elem. anal.;

Kinetics; at 294 K; followed by NMR;

in deuterated toluene byproducts: tert.-butylcyclopropane, 2-tert.-butylpropene; stirring of the combined solns.(flask fitted with a closed valve) under Ar, further product: intractable black ppt. (Rh(x)(CO)y); not isolated; monitored by 1H NMR;

in deuterated toluene byproducts: tert.-butylcyclopropane, 2-tert.-butylpropene; stirring of the combined solns.(flask fitted with a closed valve) under Ar; further product: intractable black ppt. (Pd); not isolated; monitored by 1H NMR;

in deuterated toluene byproducts: Pd; stirring of the combined solns.(flask fitted with a closed valve) under Ar at 25°C,; not isolated; monitored by 1H NMR, GC anal.;