The relation between natural and synthetical glycerylphosphoric acids. Pt. 2 / by Frank Tutin and A.C.O. Hann.
- Tutin, Frank.
- Date:
- [1906]
Licence: In copyright
Credit: The relation between natural and synthetical glycerylphosphoric acids. Pt. 2 / by Frank Tutin and A.C.O. Hann. Source: Wellcome Collection.
11/14 page 1757
![When crystallised from water, it was obtained in stout needles, which, after drying at 100°, melted at 158—159°. 0*4972, on drying at 100°, lost 0*0526 H20. H20 = 10*6. The estimation of the water of crystallisation was then repeated, using another sample of salt. 0*2980, on drying at 100°, lost 0*0314 H20. H2O=10*5. The air-dried and the anhydrous salt were subsequently analysed, with the following results : 0*1946 of air-dried salt gave 0*3876 C02 and 0*1240 H90. C = 54*3 ; H = 7*l. 0*2332 of salt dried at 100° gave 0*5196 C02 and 0*1356 H20. C = 60*8 ; H = 6*5. C49H6iOhN4P,6^H20 requires C = 54*6; Ii = 6*8; H2O=10*9 per cent. requires C = 61*3 ; H = 6*3 per cent. 0*2464, dissolved in 25 c.c. of absolute alcohol, gave aD -33' in a 2-dcm. tube, whence [a]D -27*9°. 0*1593, dissolved in 25 c.c. of water, gave aD -18*3' in a 2-dcm. tube, whence [a]i> ~ 23*9°. Synthetical Glycerylphosphoric Acid. The barium salt of the synthetical glycerylphosphoric acid was pre¬ pared under such conditions as are known to yield only the mono-ester (compare Carre, Compt. rend., 1903, 137, 1070; Power and Tutin, Trans., 1905, 87, 249). It was recrystallised from water, when it was obtained as a granular powder. 0*3036 of air-dried salt, on heating at 125°, lost 0*0077 H20. H20 = 2*5. C.(H706PBa,^H20 requires H20 = 2*8 per cent. 5*9158 of an aqueous solution, saturated at 17°, gave on evapora¬ tion 0*1102 of residue, therefore one part of the salt is contained in 53*7 parts of solution. Brucine Salt of Synthetical Glycerylphosphoric Acid.—This salt was prepared in the same manner as the previously described brucine salts, and possessed the same appearance and melting point as the brucine salt of the natural acid. 0*4987, on drying at 100°, lost 0*0570 H20. H20=ll*4. 0*4948, „ 100°, „ 0*0588 H20. H20 = ll*9. 0*3750, „ 100°, „ 0*0448 H2Q. H20 = ll*9.](https://iiif.wellcomecollection.org/image/b30610035_0011.jp2/full/800%2C/0/default.jpg)
