Chemistry of Essential Oils

186 THE CHEMISTRY OF ESSENTIAL OILS

has been isolated by means of its phthalic acid ester, which melts at 230°..
It is a solid body, melting at 58° to 62° and boiling at 196° to 198°.

6. Teresantalol.—This is also an alcohol having the formula
   C 10 H]60. It is a solid, melting at 111° to 112°when recrystallised from
   petroleum ether, and boiling at 210° to 220°. When purified by sub-
   limation it melts at 112° to 114°.


7. Nortricycloeksantalal is an aldehyde of the formula CUH 16 O. It
   can be isolated as its bisulphite compound. When so purified it has the
   following characters:—
   Boiling-point 86° to 87° at 6 mm.
   „ 220° to 224° „ 761 mm.
   Specific gravity at 20° 0-9938
   Optical rotation - 38° 48'
   Refractive index 1-48393 at 20°
   It forms a semicarbazone melting at 223 ° to 224°, and a liquid oxime
   boiling at 135° to 137° at 7 mm.


8. Santalone.—This is a ketone of the formula CnH1(.O, also isolated
   by Miiller. It has the following characters:—
   Boiling-point 214° to 215°
   Specific gravity 0-9906
   Optical rotation - 62°
   Refractive index 1-5002
   It forms a semicarbazone melting at 174° to 176°, and an oxime
   melting at 75°.


9. A ketone of the formula CnH 16 O, so far unnamed. It forms a
   semicarbazone melting at 208° to 209° and an oxime melting at 97°
   to 99°.


10. Santalene, C 15 H 24 .—This sesquiterpene was first discovered by
    Von Soden and Miiller,^1 but afterwards found by Guerbet to consist of
    two isomeric sesquiterpenes. Schimmel & Co.^2 have also investigated
    the mixture, and the following characters are assigned by the two
    authorities to the compounds in question :—

Specific Gravity.

Rotation

Boiling-point

Refractive Index.

a-Santalene.

Guerbet.

0-913 at 0°

• 14°

Schimmel.

0-913 at 15°

— 3° 34'

252° at 753 mm.

1-49205

^-Santalene.

Guerbet.

0-914 at 0°

• 28-5°

Schimmel.

0-894 at 20°

• 41° 3'
  125 at 7 mm.
  1-4946

Semmler

3

gives the following figures for the isomeric santalenes :—

a-Santalene. /3-Santalene.

Specific gravity.. 0-8984 at 20° 0-892 at 20°

Optical rotation.. - 15° - 35°

Refractive index.. 1 4 HO 1-4932

Boiling-point.. 118° to 119° at 9 mm. 125° to 127° at 9 mm.

11. Santalol, C 15 H 26 O or C 15 H 24 O.—This is a mixture of isomeric
    alcohols, the characters of which are not clearly established. Guerbet
    (loc. cit.) gives the following as the characters of a-santalol and /3-santalot
    and their acetates :—

(^1) Comptes Rendus, 130 (1900), 417. (^2) Schimmel's Bericht, October, 1910, 107.

• Berichte (1907), 3321.