in neat (no solvent) heating in quartz tube F2 with CoF2 in quartz boat; vigorous reaction at 75°C, temp. arise to 200°C; cooling in F2 stream; removal of F2 by N2;;
in neat (no solvent) byproducts: Cl2, O2; heating Co3O4 to 245-250°C, adding under stirring gaseous ClF3, forcing temperature step by step to 400°C; No formation of OF2 and ClF;;
in neat (no solvent) byproducts: Br2, O2; heating Co3O4 to 245-250°C, adding under stirring gaseous BrF5, forcing temperature step by step to 400°C; no formation of OF2 and ClF;;
in neat (no solvent) byproducts: Cl2, O2; heating CoCO3 to 245-250°C, adding under stirring gaseous ClF3, forcing temperature step by step to 400°C; no formation of OF2 and ClF;;
