in not given

in neat (no solvent) reaction on heating WO2 with CCl4 to 250°C in a closed tube for 8h;;

in neat (no solvent) react. starting from temp. below 200°C;;

in neat (no solvent) WO3 mixed with excess of eutectic mixt. of LiCl/KCl (mol ratio 3:2), heated at 380-400°C under dynamic vac. for 2 h; product sublimed in cooler parts of app.; elem. anal.;

in neat (no solvent) react. of WO3 and WCl6 in stoich. amts. in sealed ampoule at 100°C according to P. C. Crouch et al., J. Inorg. Nucl. Chem., 1970, 32, 329; treatment of oxide sublimate with ether at 20°C, WO2Cl2 residue (drying in vac.); evapn. of decanted soln. gives WOCl4 and WOCl4*(C2H5)2O which dissolves in a vac. at 57°C to give WOCl4; elem. anal.;

in gas thermal decomposition reaction in air between 0 and 1000°C, heating rate 10°C/min<250°C removal of 1 PMe3, at 250°C 2 PMe3, at 480 and 650°C formation of WOCl3 and WO2Cl2, formation of WO3 also observed;

in neat (no solvent) decomposition at 350-500°C on heating in a closed tube; further product;;

excess of TlCl,slow heating up to 900°C, 10 E-5 torr or Ar atm, after 3 h quick cooling to room temp.;

MoO3:WOCl4 = 1:2; 100-220°C;

vapour of WO3 co-condensed with excess of vapour of BCl3 at -196°C in vac.; heated to 20°C in vac., WOCl4 sublimed at 180°C, WO2Cl2 sublimed at 300°C;