— 52 — 
In view of these results the compound must be considered as a 
sesquiterpene alcohol. 
For further identification an attempt was made to acetylise the 
alcohol by means of acetic acid anhydride, but the reaction -product 
only showed a content of 5 ^/q ester, which was not submitted to further 
examination. The bulk of the alcohol had passed over into a hydro- 
carbon, with loss of water. 90 per cent, formic acid is most suitable 
for splitting off water. 100 gm. sesquiterpene alcohol each were heated 
to boiling point with three times the quantity formic acid, well shaken 
up, and after cooling mixed with water. The layer of oil removed 
from the liquid was freed from resinous impurities by steam- distillation, 
and then fractionated at atmospheric pressure. It was then found 
that we had before us a mixture of dextrorotatory and Isevorotatory 
hydrocarbons. By very frequently repeated fractional distillation, partly 
in vacuo, partly at ordinary pressure, it was possible to separate two 
isomeric sesquiterpenes, which, after treatment with aqueous alkali, 
and distillation over metallic sodium, showed the following physical 
constants : 
1. 1-Sesquiterpene. 
Boiling point 102° to 103° (6 mm); 247° to 248^ (748 mm); 
aD = -55°48'. 
nj)2oo = i>49287; d^go =0,8956. MR = 65,96 (calculated for 
Ci5H2, = 66,15). 
Elementary analysis gave the following results: 
0,0934 gm. of the substance yielded 0,3014 gm. COg and 
0,1000 gm. H2O. 
Found: Calculated for C-^^^H^^: 
C: 88,0 0/, 88,130/, 
H: 11,890/, 11,86 0/, 
11. d-Sesquiterpene. 
Boiling point: 265,5° 266° (750 mm); = -f" 58^^40'; 
nD20° = 1^50602; d^go =0,9236. 
On combustion 0,0712 gm. of the substance yielded 0,2300 gm. 
CO2 and 0,0758 gm. HgO. 
Found: Calculated for CJL5H24: 
C: 88,io0/, 88,130/, 
H: 1 1,8 0/, 11,860/, 
With the use of other agents splitting off water, such as sulphuric 
acid and phosphorus pentoxide, both hydrocarbons were again ob- 
tained, though in varying proportions. 
