P. Bougeard, B. Gupta, Michael D. Johnson
Feb 24, 1981
Citations
0
Influential Citations
18
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract Benzylbis(dimethylglyoximato)pyridinecobalt(III) reacts with bromotrichloromethane at from 50 to 90°C in chloroform to give good yields of trichloroethylbenzene, which are higher when imidazole is present in the reaction mixture. Methyl- and polymethyl-substituted benzylbis(dimethylglyximato)pyridinecobalt(III) complexes give higher yields of the corresponding trichloroethylarenes (85–90%), whereas 4-chlorobenzylbis(dimethylglyoximato)pyridinecobalt(III) gives a lower yield and 4-nitrobenzylbis(dimethylglyoximato)pyridinecobalt(III) only gives the 4-nitro-trichloroethylarene when imidazole is present during the reaction. Similar reactions were observed with benzylcobaloximes and trichloromethanesulphonyl chloride both thermally and under irradiation by tungsten lamps through all-pyrex apparatus. The reactions are interpreted as a direct attack of the trichloromethyl radical on the α-carbon of the benzyl ligand.