Image from page 335 of “Transactions of the Royal Society of New Zealand” (1911)

Image from page 335 of “Transactions of the Royal Society of New Zealand” (1911)
Acid Reflux
Identifier: transactionsofro1911roya
Title: Transactions of the Royal Society of New Zealand
Year: 1911 (1910s)
Authors: Royal Society of New Zealand
Subjects: Science
Publisher: Wellington, N.Z. : The Society
Contributing Library: Brigham Young University Hawaii, Joseph F. Smith Library
Digitizing Sponsor: Consortium of Church Libraries and Archives

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book

Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
crystallization. Henpentecontyl Acetate.—This compound was obtained from the above-mentioned secondary alcohol by boiling it with a large excess of aceticanhydride under a reflux condenser for six hours. The alcohol gradually dissolved in the acetic anhydride, indicating thatacetylation was taking place. The solution was filtered while hot. andthe filtrate, on cooling, deposited the acetate as a white solid. This wasrecrystallized from acetic anhydride, and after drying over caustic potashin a vacuous desiccator, melted at 60-5-61-5°. The melting-point was un-changed by further crystallization. Analysis of Henpentecontyl Acetate. Calc. for C53H106O2. Found. C = 82-17 81-89 H = 13-69 13-57 * Henpentacontane would sound more euphonious, but henpenteoontane is philologically more correct. 282 Transaction* It is interesting to compare S. Kippings figures* for the secondaryalcohol and acetates produced from ketones lower in the series with thedata for henpentecontane 26 01. and acetate.

Text Appearing After Image:
Ethyl Cerotate.—This compound was prepared from cerotic acid bydissolving the acid in absolute alcohol and boiling for twenty-four hourswith 5 per cent, sulphuric acid. The ester obtained by this process wascarefully washed free from sulphuric acid, dried in a vacuum, and thendistilled under reduced pressure. The distillate crystallized from alcoholin colourless plates. It is easily soluble in alcohol, motor spirit and ethylacetate, and acetic acid. It boiled at 285° (14 mm.) and melted at 58-5-59°, and further crystal-lization did not raise the melting-point. Beilstein gives 59-60° as themelting-point of ethyl cerotate. The following is a comparison of the melting-points of montanic andcerotic acids, and the melting-points of their ethyl esters :— Ethyl Ester. Difference. Cerotic acid (78°) .. .. 58-5-59° 18-75° Montanic acid (83°) .. .. 67° 16° Analysis of Ethyl Cerotate.Calc. for C28H5602. Found. C = 79-24 79-14 H = 13-20 13-05 B. MONTANIC ACID AND DERIVATIVES. In Part

Note About Images
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 work.

no comment

Leave a Reply