Tungsten Dichloride Dioxide (2)

Tungsten dichloro dioxide (WO2Cl2) alias is pizza grass and the system number is: CAS number: 13520-76-8, MDL number: MFCD00054136, EINECS number: 236-862-1, PubChem ID: 24863944.Synthesis of tungsten dichloro oxide as follows:
1. Preparing the reaction tube, the reaction tube has prepared a number of pure oxyhalide by chemical transmission technology.
2. Insert the tungsten oxide9.274g and tungsten chloride 7.931g in a long 15cm, 24cm diameter rigid tube, which was mixed.
3. Adding a slight excess of 1mg of WCI6 in a glass tube.
4. Connect one end of the glass tube is placed frozen in liquid nitrogen and the other end connected to a vacuum system to react together.
5. About 20h after completion of the reaction with a yellow sheet tungsten dichloro dioxide (Ⅵ) crystal in growth area. Then placed tube in reverse hot temperature gradient (200 ℃ / temperature) immediately which allow the more volatile impurities (such as WCl6 and WOCl4) condensed into the empty end of the reaction tube.

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