potassium dichromate; sulfuric acid in water T=34°C; 2 h;

ozone in tetrachloromethane T=20°C; Yield given;

methanol; ozone in tetrachloromethane T=20°C; Further byproducts given. Yields of byproduct given;

ozone; acetic acid in tetrachloromethane Further byproducts given. Yields of byproduct given;

tetrabutylammomium bromide; tetra-n-butylammonium tetrafluoroborate in tetrahydrofuran Electrochem. Process; steel anode (100 cm**2, 2.5 mA/cm**2, 40°C, 25 mF passing); solvent removing (vacuum), residue treating with hexane, soln. filtration off, filtrate reducing in vacuum, residue subjecting to column chromy.(silica gel/hexane); elem. anal.;