The constituents of the essential oil from the fruit of Pittosporum undulatum / by Frederick B. Power and Frank Tutin.

  • Frederick Belding Power
Date:
[1906]
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: The constituents of the essential oil from the fruit of Pittosporum undulatum / by Frederick B. Power and Frank Tutin. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    123°, was prepared. The fraction was also examined for camphene, but with a negative result. Fraction 165—169°.—The weight of this fraction was 18 grams. 0-1324 gave 0-4274 C02 and 0T401 H20. 0 = 88-0 ; H = 11 8. rfl5°/15° = 0-8494; aD +73°50' in a 1-dcm. tube. Fraction 169—173°.—The weight of this fraction was 27 grams. 0-1352 gave 0-4345 C02 and 0 1428 H20. C = 87'6; H = 117. o?15°/15° = 0-8482 ] aD + 79°36'in a 1-dcm. tube. Both this fraction arid that immediately preceding it were colour- less, limpid liquids, and evidently consisted of a mixture of pinene with the constituent of the following fraction, Identification of Limonene. Fraction 173—180°.—This fraction represented by far the largest portion of the oil, and amounted to 485 grams. It was a colourless, highly refractive liquid, having the characteristic odour of limonene, and on analysis was found to consist entirely of a hydro- carbon. 0-1140 gave 0-3679 C02 and 0-1214 H20. C = 88'0; H=lt-8. C10H16 requires 0 = 88’2 ; H = 11 -8 per cent. (715°/15° = 0-8488 ; aD + 89°10' in a 1-dcm. tube. It was teadily identified as tf-limonene by the formation of the tetrabromide, which, after i ecrystallisation from ethyl acetate, melted at 104°. Fraction 180—185°.—The weight of this fraction was 46 grams. 0-1161 gave 0 3657 C02 and 0-1211 H20. C = 85-9 ; H = 11 6. dl5°/15° = 0-8588 ; aD +82°42' in a 1-dcm. tube. This fraction evidently also consisted to a large extent of (7-limonene. Fraction 185—195°.—The weight of this fraction was only 4-8 grams. 0-1083 gave 0-3347 C02 and 0-1128 H20. C = 84-3 ; H = il-6. dl5°/15o = 0-8727 ; aD +66°48' in a 1-dcm. tube. It was evidently a mixture of the hydrocarbon contained in the pre- ceding fractions with the oxygenated substance contained in the succeeding ones. Fraction 195—205°.—This fraction, which was very pale yellow, amounted to only 4-1 grams. 0-1251 gave 0-3736 002 and 0-1293 H20. C = 81-4; H = ll-5. d 15°/150 = 0-8938 ; aD +46°32' in a 1-dcm. tube.
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