in not given byproducts: C4H9I, C6H11I; determined by NMR;;

ethylaluminum dichloride in dichloromethane under N2, at -78°C, stirred for 1 h; filtered, washed (hexane), solvent removed, chromy. (silica gel, hexane); NMR, IR, MS;;

titanium tetrachloride in dichloromethane under N2, at -78°C, stirred for 1h; filtered, washed (hexane), solvent removed, chromd. (silica gel, hexane); NMR, IR, MS;;