Online Encyclopedia

OLEFINE

Online Encyclopedia
Originally appearing in Volume V26, Page 651 of the 1911 Encyclopedia Britannica.
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OLEFINE TERPENES Myrcene, C,oHic, was first isolated by F. B. Power and C. Klebet from oil of bay (Schimmel & Co., Bulletin, April 1895, p. II); it is also found in oil of sassafras leaves. It is obtained from bay oil by shaking the oil with a 5 per cent. solution of caustic soda, followed by fractionation in vacuo. It boils at 67-68° C. (20 mrn.), and polymerizes when heated for some time. When oxidized by potassium permanganate it yields succinic acid. By the action of glacial acetic acid in the presence of dilute sulphuric acid, a liquid is produced, which on hydrolysis yields myrcenol, C,oH,30, an alcohol which is probably an isomer of linalool (P. Barbier, Corn pies rendus, 1901, 132, p. 1048). The hydrocarbon is probably to be considered as being (CH3)2C : CH . (CH2)2 . C(: CH2) . CH : CH2 (Enklaar, Bulletin of Rouse-Bertrand fits, Nov., 1906, p. 92). Ocymene is an isomer which can be extracted from the leaves of the basil. Enklaar (loc. cit.) represents it as (CH3)2C: CH . CH2 . CH : C(CH3) • CH : CH2. Anhydro-geraniol, C,oHls, the first olefine terpene isolated, was pre; pared in 1891 by F. W. Semmler; it is formed when geraniol is heated with potassium bisulphate to 170`' C.
End of Article: OLEFINE
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