mixt. was warmed to 209 K for 2 h; examined by NMR, sepd. by fractional condensation;

in neat (no solvent) byproducts: PF2HS; excess S(PF2)2 was condensed into ampoule containing PHO(OH)2, mixt. was warmed to room temp. for 4 h; volatile products were sepd. by fractional condensation in vac., product was abtained as the fraction valatile at 250 K but retained at 209 K;

in not given room temp.;