in hexane byproducts: 2,3-dimethyl-1,3-butadiene; Irradiation (UV/VIS); photolysis of a soln. of germanium compd. in hexane with isoprene at 248nm;

in hexane Kinetics; byproducts: CH2C(CH3)C(CH3)CH2; Irradiation (UV/VIS); laser flash photolysis; not isolated;