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Encyclopedia Britannica - Main :: FRA-GAE |
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FURAZANES (furoa.a'diazoles) , organic compounds obtained by heating
diketones
ammonia
heating
ammonia
hours
ordinary temperature) which boils at 156 C. (744 mm.). Potassium permanganate oxidizes it first to methylfurazanecarboxylic acid and then to furazanedicarboxylic acid. Methylethylfurazane and diphenylfurazane are also known. By warming oxyfurazane acetic acid with excess of potassium permanganate to roo C. oxyfurazanecarboxylic acid is obtained (A. Hantzsch and J. Urbahn, Ber., 1895, 28, p. 764). It crystallizes in prisms, which melt at 175 C. Furazanecarboxylic acid is prepared by the action of a large excess of potassium permanganate on a hot solution of furazanepropionic acid. It melts at 107 C., and dissolves in caustic
oxide
Kekule 's dibromnitroacetonitrile is dibromfuroxane.The formulae of the compounds above mentioned are: HC: N CH3C: N>0 HC : N>O H:N CHa C: N HO2CC: N Furazane. Dimethyl- Furazane- furazane. carboxylic acid. End of Article: FURAZANES (furoa.a'diazoles) If you wish, you can link directly to this article.
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