Scientific American Supplement, No. 443, June 28, 1884 by Various
page 23 of 107 (21%)
page 23 of 107 (21%)
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First of all, I took a number of cones, cut them up into small pieces,
and placed them in a large glass beaker, then nearly filled it with distilled water, and heated to about 80° C., keeping the decoction at this temperature for about half an hour, I occasionally stirred with a glass rod, and then allowed it to cool, and filtered. This filtrate was then evaporated nearly to dryness, when a small quantity of six-sided prisms crystallized out, which subsequently were found to be the hydrate of phenol (C_{6}H_{5}HO)_{2}H_{2}O. Its melting point was found to be 17.2° C. Further, the crystals already referred to were dissolved in ether, and then allowed to evaporate, when long colorless needles were obtained, which, on being placed in a dry test tube and the tube placed in a water bath kept at 42° C., were found to melt; and on making a careful combustion analysis of these crystals, the following composition was obtained: Carbon 76.6 Hydrogen 6.4 Oxygen 17.0 ----- 100.0 This gives C_{6}H_{6}O, which is the formula for phenol. On dissolving some of these crystals in water (excess) and adding ferric chloride, a beautiful violet color was imparted to the solution. To another aqueous solution of the crystals was added bromine water, and a white precipitate was obtained, consisting of tribromophenol. An aqueous solution of the crystals immediately coagulated albumen. |
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