Tungsten Pentachloride Producing

Tungsten pentachloride is dark green crystal flash, break down easily when exposed to air. There are two methods for its producing: one is in the hydrogen to restore tungsten pentachloride, and the other produce by six tungsten chloride and tetrachlorethylene reaction.
Using hydrogen reduction to producing tungsten pentachloride and the chemical reaction equation is: 2WCl6 + H2 → 2WCl5 + 2HCl. First, heating tungsten hexachloride at 410 ~ 425 ℃ in quartz tube will be at the same time introducing hydrogen to restore. During the reaction, there generating WClO and cheap WCl4, WCl2 and others, so it needs to sublimation purification in a stream of nitrogen, and then stored in a sealed tube.
By tungsten hexachloride and tetrachlorethylene reaction to obtain tungsten pentachloride the  chemical reaction equation is: 2WCl6 + C2Cl4 → 2WCl5 + C2Cl6. This reaction equipment is same with tungsten tetrachloride’s. Firstly making reaction equipment in vacuum state, and ready for 4 ~ 7g of tungsten hexachloride and tetrachlorethylene 25ml, and irradiation of 100W bulb at 100 ℃ the reaction is carried out in an oil bath for 24 hours.

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