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URETHANE, NH2CO

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Originally appearing in Volume V27, Page 795 of the 1911 Encyclopedia Britannica.
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URETHANE, NH2CO ,C,H5, the See also:ethyl ester of carbamic See also:acid, is synthesized from See also:ammonia and chlorcarbonic ester or diethyl carbonate; by prolonged boiling of See also:urea with See also:alcohol (A. W. See also:Hofmann, Ber., 1871, 4, p. 268); by the See also:action of alcoholic hydrochloric acid on See also:cyanogen; by the action of alcohol on urea chloride (L. Gattermann, See also:Ann., 1888, 244, p. 40); and by warming alcoholic hydrochloric acid with an alcoholic See also:solution of See also:potassium cyanate (0. Folin, Amer. Chem. Jour., 1897, 19, p. 341). It crystallizes in large plates, readily soluble in See also:water and melting at 49-50° C. When heated with ammonia to ,8o° C., it gives urea.

See also:

Cold alcoholic potash decomposes it into potassium cyanate and alcohol. Nitroso-urethane, NO. NH • CO2C2H6, formed by reducing ammonium nitro-urethane with See also:zinc dust and glacial acetic acid (J. Thiele, Ann., 1895, 288, p. 304), crystallizes in needles which melt at 51–52° C. (with decomposition).

End of Article: URETHANE, NH2CO

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