in benzene-d6 byproducts: toluene-4-d, methane; Irradiation (UV/VIS); NMR tube, CO atmosphere (1 atm); irradn. (200 W Hg lamp, 20 min); detd. by (1)H NMR spectroscopy;

in benzene-d6 Irradiation (UV/VIS); NMR tube, CO atmosphere (1 atm); irradn. (200 W Hg lamp, 45 min); detd. by (1)H NMR spectroscopy;