The constituents of chaulmoogra seeds / by Frederick B. Power and Frank H. Gornall.
- Frederick Belding Power
- Date:
- [1904]
Licence: In copyright
Credit: The constituents of chaulmoogra seeds / by Frederick B. Power and Frank H. Gornall. Source: Wellcome Collection.
8/20 page 843
![01087 gave 0-3077 C02 and 0*1139 H20. C = 77‘2; H = ll-6. C1sH3202 requires C = 77’l ; H = ll-4 per cent. Its density was 0’9066 at 16°/16°. In a 1 dcm. tube, it gave aD + 38°27', whence [a]D +42*4°. This substance, on account of its method of isolation and purifica¬ tion, can be neither an acid nor a lactone. As it could be recovered unchanged after boiling with acetic anhydride and sodium acetate, it is also not an alcohol. It is unsaturated, and would appear to contain one ethylenic linking. 0*6460 required 0-5997 iodine. 1 = 92-8. C18H3202, with one ethylenic linking, requires 1 = 90*7 per cent. Tt has not yet been definitely determined to what class of compounds this substance belongs, but from some results which will be communi¬ cated later it may be stated that in all probability it is either an unsaturated, open chain diketone or a partly cyclic, unsaturated keto- ether. The occurrence in nature of substances conforming with either of these types has apparently not hitherto been observed. The strongly alkaline solution of potassium salts from which the above-described neutral liquid had been extracted by ether was acidified with sulphuric acid, when some solid fatty acids separ¬ ated. On distilling the liquid, a volatile acid was obtained which was converted into its barium salt, the reactions and analysis of the latter showing it to be formic acid. The Fatty Oil (Chaulmoogra Oil). At the ordinary temperature, this is a soft solid, having a faintly yellow colour and a characteristic odour. Its constants were deter¬ mined with the following results. Melting point . Specific gravity . [«]i- . Acid value . Saponification value Iodine value.. Expressed oil. 22—23° ' 0-951 at 25° 0-940 at 45° + 52-0° 23-9 213-0 103-2 Oil extracted by ether. 22—23° 0-952 at 25° ) 0-942 at 45°/ + 51-3° 9-5 208-0 104-4](https://iiif.wellcomecollection.org/image/b30606627_0008.jp2/full/800%2C/0/default.jpg)
