in tetrahydrofuran Kinetics; react. at 21, 10 and 4°C; rate consts. given;

in cyclohexane byproducts: o-xylene, toluene, o,o'-bitolyl; a soln. of Ni-complex in cyclohexane was heated at 75°C in a sealed tube; not isolated, detected by UV;

excess of P(C2H5)3;