. Annual report on essential oils, synthetic perfumes, &c. Essences and essential oils; Perfumes. Notes on scientific research. 99 lected in the cooler. After treating the distillate with 5 per cent, soda lye it was once more distilled over metallic sodium. The p-cymene obtained in this way had the following constants:—b. p. 176 to °; Since purified ^-cyrriene is an important solvent Wheeler determined the solubility of some compounds in this substance at different temperatures: 100 g. of ^-cymene dissolved g. of ^-camphoric acid at 100°, g. of thymol,
. Annual report on essential oils, synthetic perfumes, &c. Essences and essential oils; Perfumes. Notes on scientific research. 99 lected in the cooler. After treating the distillate with 5 per cent, soda lye it was once more distilled over metallic sodium. The p-cymene obtained in this way had the following constants:—b. p. 176 to °; Since purified ^-cyrriene is an important solvent Wheeler determined the solubility of some compounds in this substance at different temperatures: 100 g. of ^-cymene dissolved g. of ^-camphoric acid at 100°, g. of thymol, g. of benzoic acid and g. of salicylic acid at 25°. The author observed further that ^>-cymene was quickly coloured red by an addition 02 per cent, of ^-anisidine. Other impurities cause similar colorations, whilst the pure ^?-cymene remains colourless. Pinene.—A new partial synthesis of pinene via the pinocamphyltrimethylammonium hydroxide, yielding a pure pinene of b. p. 156° (725 mm.), has been effected by L. Ruzicka and H. Trebler1). They started from pinocamphylamine (I) which was prepared by the catalytic reduction of pinylamine (II); the further synthesis proceeded along the line of the reactions which we describe in the case of bornylene (see page 103 of this Report). The authors could also in this case prepare two isomeric pinocamphyl- trimethylammonium iodides (m. p. 255° and 300 to 301°). In preparing the pinene- nitrosochloride the authors observed, that alcoholic hydrochloric acid yields a product of a higher melting point, 107 to 108°, than that which results when the process of Wallach is employed (m. p. 103°). CH-CH3 C-CH< CHNHs. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Schimmel & Co. Miltitz bei Leipzig : Schimmel & Co.
Size: 2088px × 1197px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubject, booksubjectperfumes
