Phellandral, to which in all probability the above formula may be assigned, is found in small amounts in the oil of water-fennel. B. p. 89° (5 mm.); d15o0,9445; aD - 36°30'; nD20o1,4911.1) When exposed to air, or when treated with silver oxide, phel-landral is readily oxidized to the corresponding acid which melts at 144 to 145°. Of its derivatives the oxime, m. p. 87 to 88°, the semicarbazone, m. p. 202 to 204°, and the phenylhydrazone, m. p. 122 to 123°, may be mentioned.
Aldehyde C10H16O from lemongrass oil. B. p. 68° (6mm.); d15o0,9081; aD + 0°50'; nD20o 1,45641. M. p. of the semicarbazone 188 to 189°.
Aldehyde C10H16O from gingergrass oil. B. p. 221 to 224° (754 mm.), 76 to 78° (5 mm.); d15o 0,9351; aD ± 0°; nD20o 1,47348. Upon reduction an alcohol C10H18O results, the phenylurethane of which melts at 100 to 101°. When exposed to the air this aldehyde is oxidized to an acid C10H16O2, m. p. 106 to 107°, which can also be obtained from the saponification liquid of gingergrass oil. Derivatives: oxime, m. p. 115 to 116°, semi-carbazone, m. p. 169 to 170°, semioxamazone, m. p. 244 to 245°, phenylhydrazone, m. p. 63°, B-naphthocinchoninic acid, m. p. 261°.
1) Report of Schimmel & Co. October 1904, 88.