in neat (no solvent) heating Re-sponge (pre-trated with H2 at red heat) with 2-fold excess ofF2 (6 atm) slowly to 640 K during 4 h (H2-pretreated Ni-vessel); cooling to 190 K, pumping off excess F2; 95-99percent purity (Raman spectroscopy);

in neat (no solvent)

dichloromethane in dichloromethane byproducts: CH2ClF, CHClF2, CHCl2F; inert atmosphere; excess of CH2Cl2, warming to room temp., 4 h; further byproduct;

in neat (no solvent) heating of ReF7 with B2S2 in Ni reactor at 300°C;

in neat (no solvent) heating ReF7 with Sb2S3 in a Ni reactor at 300°C;