Dictionary of the active principles of plants: alkaloids : bitter principles; glucosides; their sources, nature, and chemical characteristics / with tabular summary, classification of reactions, and full botanical and general indexes. By Charles E. Sohn.
- Sohn, Charles E.
- Date:
- 1894
Licence: Public Domain Mark
Credit: Dictionary of the active principles of plants: alkaloids : bitter principles; glucosides; their sources, nature, and chemical characteristics / with tabular summary, classification of reactions, and full botanical and general indexes. By Charles E. Sohn. Source: Wellcome Collection.
Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.
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![gives a precipitate with nitric acid from a dilute solution of acetic acid, whereas Cusconidine is only precipitated by nitric acid from a concentrated acetic solution. (10) CONCUSCONINE A., C23H2f.N204 + H20 ; monoclinic prisms ; M.P. 144°, solidifying on further heating, melting again at206°-8°; dextro- rotatory ; neutral reaction ; tasteless (salts are bitter). Soluble readily in ether, chloroform, or benzene ; very difficultly in alcohol even boiling ; scarcely in petroleum ether, and not in water. Precipitants: Alkaline hydrates, resinous. [Not ammonia, nor lead acetate, neutral.] Platinum chloride, yellow flocculent. Gold chloride, dirty yellow, with reduction of gold. Colour tests: Concentrated sulphuric acid, bluish-green, olive-green on warming. ,, „ „ with potassium bichromate, dark reddish- brown, changing to intense green. Nitric acid, dark green (without solution) ; added to the alcoholic solution, nitric acid gives a magnificent green coloration. (11) CONCUSCGNIDINE A., C23H26N262 ; yellow amorphous ; M.P. 124°; slightly dextro-rotatory. (12) CUSCAMINE A., crystalline (from alcohol); M.P. 218°; non- fluorescent ; taste astringent and somewhat bitter. Soluble in ether and chloroform (very readily), and in alcohol. Precipitated by alkaline hydrates and ammonia. [No colour with Ferric chloride.] (13) CHAIRAMINE A., a2H.:0N.,O4 + HoO. Crys. needles or prisms; anhydrous at 140°, then melts at 233° ; neutral reaction, dextro-rotatory (about + 100°). Soluble readily in ether and chloroform, in 540 parts of '97 percent, alcohol at 11° C, with difficulty in water, and insoluble in dilute hydro- chloric acid. Precipitants: Alkaline hydrates. 7 • , • Ammonia. { insoluble in excess. Platinum chloride—yellow needles, insoluble in alcohol ; formula (Ch-HCl)o PtCl4. Colour tests : Concentrated sulphuric acid, colourless. Nitric acid, gradual dark green. Frohde's solution, colourless. (14) CONCH AI RAM INE A, C22H26N204, with H20, and with C„H60 (alcohol\ prismatic crystals; M.P. 108 -110° the hydrate, 120° anhydrous, or 82°-86° the alcoholate. Eeaction almost neutral. Soluble in hot alcohol (with difficulty cold), in ether, and readily in chloroform ; scarcely soluble in dilute hydrochloric acid. Precipitants: Alkaline hydrates, pp. becomes crystalline, and is insoluble in excess. Ammonia, insol. in excess. Platinum chloride, dark yellow, flocculent. Potassium snlphocyanide. Colour tests: Concentrated sulphuric acid, brown, changing to intense green. Nitric acid added to the hydrochloric solution, dark green. Frohde's reagent, brownish. (15) CHAIRAMIDINE A., C22H26N„04; amorphous: M.P. 127°; dextro- rotatory (=+7'3°) neutral. Soluble in alcohol, ether, chloroform, benzene ; not in water. Removed by benzene from alkaline solutions. Absorbed by charcoal. Precipitants: Alkaline hydrates. ) Ingolnble Ammonia. > • . „ , (in excess. Alk. carbonates. ) Colour tests: Concentrated sulphuric acid, yellow, becoming dark green. Nitric acid does not dissolve the solid alkaloid. ,, to the Hydrochloric solution, dark green. (1G) CONCHAIRAMIDINE A., C„2H26N204, crys. prisms.; M.P. 114°-115' (anhydrous) ; neutral reaction. Soluble in alcohol, ether, chloroform, benzene, acetone, and easily in acetic and mineral acids except nitric. Insoluble in water. Removed from alkaline solutions by benzene, etc. Precipitants: Alkaline hydrates ) Ammonia arb°nateS ( PP- °ily' becoming crystalline. Bary ta ; Platinum chloride, yellow floccu- lent, pp. = (ChHC)).,PtCl4+5 H20.](https://iiif.wellcomecollection.org/image/b21503023_0048.jp2/full/800%2C/0/default.jpg)
