Health & Environmental Research Online (HERO)


Print Feedback Export to File
8212901 
Journal Article 
The Reaction of Wolfram Dioxide with Dichlorodifluoromethane 
Dinsmoor Webb, A; Young, HA 
1950 
Yes 
Journal of the American Chemical Society
ISSN: 0002-7863
EISSN: 1520-5126 
72 
8 
3356-3359 
English 
By passing dichlorodifluoromethane over wolfram dioxide at a temperature of 525° in a nickel metal reactor with removable product collector units in a temperature gradient zone it was found that the main wolfram-containing products were solid solutions of crystal form and color similar to those of wolfram oxytetrachloride. The product compositions could be represented as wolfram oxytetrachloride in which from 14.4 to 49.9 mole per cent. of the chloride was replaced by fluoride. Very small amounts of wolfram hexafluoride and wolfram hexachloride were also found. The wolfram was in the plus six oxidation state in all of the products. In addition to the wolfram-containing products, carbon, carbon monoxide, carbon dioxide, carbonyl chloride, and carbonyl fluoride were found. Consideration of the amounts of the various products obtained indicated that the main reaction may be represented by the equation 2WCO2 + 2CCl2F2 = WOF4 + WOCl4 + 2CO. The other products likely resulted from interaction of these substances with the nickel metal reactor walls and with the nickel halide films thereon. © 1950, American Chemical Society. All rights reserved.