Investigation of glycocoll and some of its products of decomposition / by Eben N. Horsford ; extracted from the American journal of science and arts, vols. III & IV, second series, 1847.

  • Horsford, Eben Norton, 1818-1893.
Date:
1847
Catalogue details

Licence: Public Domain Mark

Credit: Investigation of glycocoll and some of its products of decomposition / by Eben N. Horsford ; extracted from the American journal of science and arts, vols. III & IV, second series, 1847. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    i. ii. in. Carbon, - - - 17-86 17-15 Hydrogen, - - - 4-83 4-59 . . Nitrogen, - . . . . 20-50 These correspond with the formula C4 H4 N03, HO+N05 HO, as will be seen by the annexed estimates and results of analysis. Theory. Experiment Hydrogen, .... Nitrogen, .... Oxygen, .... 4 equiv. = 24 6 •' = 6 2 = 28 10 = 80 17-38 4 32 20-29 5801 17 49 4-71 20-50 57-30 TToo-oo 138 100-00 Boussingault by drying the salt at 110° C. (230° F.) obtained as already noticed the anhydrous compound C4 H4 N03, NOs. Oxalate of Glycocoll. Gl, O, HO. An aqueous solution of glycocoll with oxalic acid, evaporated upon a watch glass, crystallizes in rays reminding one of a cross section of wavellite. ' If alcohol be added to a solution of glyco- coll in oxalic acid, the latter in excess, the solution becomes milky, with the separation of oxalate of glycocoll. If added in small quantities and successively, it crystallizes with the beauty that characterizes all or nearly all the compounds of this body. Dessaigne obtained the salt directly from hippuric acid by em- ploying oxalic instead of a stronger acid, to effect the decomposi- tion. It does not alter upon exposure to the air. Combustion with chromate of lead gave the following :—0-3G00 grm. gave 0-4227 grm. carbonic acid, which in per cent, express- ed, gives carbon 32-02, corresponding with the formula C4H4N03,C3Ori,HO, which requires 32-43 per cent, of carbon. Acetate of Glycocoll. Gl, HO, A, 2HO. This salt is readily prepared by dissolving glycocoll in acetic acid, and adding absolute alcohol drop by drop, till the solution becomes turbid, and then afterward at intervals, as the crystalli- zation proceeds. The salt analyzed was prepared by adding ab- solute alcohol in excess to a concentrated solution of glycocoll in acetic acid, (the latter in excess,) by which the salt was thrown down. It was then redissolved by heat, and set aside to cool and crystallize, by which slender prismatic crystals of great beauty were obtained. On combustion with chromate of lead, 0-2981 grm. save 0-3644 grm. carbonic acid and 0 2031 grm. water, which in per cent.