water in melt melt of Re and K2CO3, addn. of H2O to melt;;

water in melt melt of Re and KNO3, addn. of H2O to melt;;

hydrogenchloride in hydrogenchloride byproducts: Cl2; dissolving ReCl5 in aq. HCl;; concg. soln. in presence of KCl, product ratio depending on HCl concn.;;

in water dissoln. of Re powder in 30 percent aq. H2O2, concn., pptn. with KCl;

in neat (no solvent) addn. of KCl to aq. HReO4 soln.;;

chloro-trimethyl-silane; sulfuric acid in acetonitrile (hood); stirring (25°C, 24 h); evapn. (reduced pressure), extn. (n-pentane), concn., standing (-35°C, 24 h), purifn. by sublimation (25°C/E-2 mbar);

tri-n-octylamine; hydrochloric acid in water; toluene High Pressure; soln. of (NOct3H)ReO4 (mixt. of N(C8H17)3 and H2O is treated with 37percent hydrochloric acid, KReO4 added, stirring at room temp. (2 h), extn. (toluene), washed (H2O), dried (CaCl2)) in autoclave pressurized with CO (100 atm, room temp., 15 h, 100°C); autoclave pressurized with 100 atm of CO, heated (30 h, 270°C), solvent removed (vac.), pentane added, soln. cooled to -30°C, filtn., dried (vac.);

carbon monoxide in toluene autoclave, evacuation, addn. of dry toluene and CO (purest available grade) , stirring and heating , 290°C for 40 h, 150 atm; evapn., cooled to 430°C, crystn.;

carbon monoxide High Pressure; p(CO)=250 atm, 270°C;

hydrogen; acetic acid Re-salt redn. in autoclave by hydrogen mixed with hydrochloric and acetic acid;