A manual of elementary chemistry : theoretical and practical / by George Fownes.

  • Fownes, George, 1815-1849.
Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: A manual of elementary chemistry : theoretical and practical / by George Fownes. Source: Wellcome Collection.

    967/1062 (page 939)
    table * which is divided perpendicularly into three columns of an- ureides, nion-ureides, and di-ureides, and horizontally into three layers of carbonic, oxalic, and mesoxalic products. The com- pounds connected by dotted lines differ in composition from one another by an excess or deficit of one molecule of urea minus one molecule of water, while those standing on the same level in the adjoining columns, and unconnected by dotted lines, differ from one another by an excess or deficit of one molecule of urea minus two molecules of water:— An-ureirfes. ilon-ureides. Di-ureides. CH.>03, Carbonic CNoIT.,03, Allophanic. C3N2Hc02, Aceturea. .■ C3N2H(;03, Glycoluric. V C4N4HcO„, Glycoluvil. .•C4N4H0O3, AUantoin. C2IT40.>, Acetic. C,n405, Glycollic. C2H404l Glyoxylic. C3N2H402, Hydantoln.' •' C3N2H403, Lantanuric. • •' C3N2H4o4, Oxaluric. C4N4H402, Mycomelic. C>H203, Glyoxalic' .. C2H204, Oxalic. C3N2H203, Paraban. c3n4o4 C3II4O. Malonic. . Taitronic. C4N2n403, Barbituric. C5N4H40, [Hypoxauthine. C5N4II.,02, Xanthine. C3H205, Mesoxalic. C4NzH404, Dialuric... C5N4II403, Uric acid. •C4N2H4Os, Alloxanic. — C5N4Hc04, Pseudo-uric. C'4N2H204, Alloxan. Between some of the consecutive monureides shown in this table, there exist bodies formed by the union of the two consecutive mon- ureides, with elimination of water. Such is the mode of forma- tion of allituric, lantanuric, and hydurilic acids, and of H,0 •H20 HaO alloxantin; thus:— C0N4H0O4 = C3N2H402 + C3N2H403 Allituric Hydantoln. Lantanuric acid. acid. CRN4HA = C3N2H403 + C3N2H203 Leucoturic Lantanuric Paraban ic acid. acid. acid. C8N4HnOB = C',N2H403 + C4N2H404 Hydurilic barbituric Dialuric acid. acid. acid. C8N4H407 = CNJl.O, + C4N2H204 Alloxantin. Dialuric Alloxan. acid. H.,0 * This table, together with the preceding view of the relations between the, several derivatives of uric acid, is taken from Odling's Lectures on Animal Chemistry. London, L866, i>]>- 129-135. This view of the consti- tution of the uric acid derivatives is due to Baeyer (Ann. eh. Pharra. exxvii. 109; exxx. 129; exxxv. 312).