382 
Pelargonium  Oil. 
5  Am.  Jour.  Pharm. 
\      June,  1921. 
A  terpineol  Ci0Hi8O,  a  tertiary  alcohol,  was  identified  and  iso- 
lated from  the  Reunion-oil  by  the  chemists  of  the  firm  of  Schimmel 
&  Co.  (Ber.,  1910,  II,  p.  51 J  X9H>  n>  46). 
Menthone  Ci0H18O,  a  cyclic  ketone,  was  first  found  by  Flatau 
and  Labbe  (Bull.  Soc.  chim.,  Paris,  Ser.  3,  XIX,  1898,  pp.  788- 
790),  then  by  the  chemists  of  the  firm  Schimmel  (Ber.,  1904,  I,  p. 
50),  in  the  first  runnings  of  the  distillation,  and  in  great  quantity. 
Ct/CH3 
CH  /  \ 
I  /  \ 
CH  H2C  CH2 
/\  ICH3.C.CH3I 
H2C      CH2  I  ! 
I       !  H2C     OH  CH 
H2C      CO  \  / 
\/  \  // 
CH  C 
I  I 
CH3  CH3 
MENTHONE  ACCORDING  TO  TERPINEOL. 
BECKMANN. 
A  blue-colored  high-boiling  potion,  as  it  exists  in  many  etheric 
oils,  is  found  also  in  the  pelargonium-oil.  Its  composition  is  un- 
known. Probably  it  is  the  cause  of  the  bluish-greenish  color  of  the 
Reunion-oil.  (Semmler,  Aetherische  Oele,  III,  1906,  p.  262.)  Bar- 
bier  and  Bouveault  were  the  first  to  call  attention  to  it.  They 
determined  the  boiling-point  between  1650  and  1700  C,  under  a 
pressure  of  10  mm..  In  their  opinion  it  is  perhaps  an  ether  of  the 
formula  (Ci0H17)2O. 
Ester  of  geraniol  and  citronellol.  The  knowledge  of  this  body 
is  due  to  Barbier  and  Bouveault  (Compt.  Rend.,  CXIX,  1894,  p.  281 ; 
cf.  also  the  travels  of  the  firm  Schimmel  &  Co.,  Ber.,  1894,  I,  p.  31). 
Both  alcohols  are  partly  bound  to  the  following  acids :  a.  Acetic  acid. 
CH3 
CH3COOH.    b.  Isobutyric  acid   )  CH.COOH.  c.  Isovaleric  acid 
CH3 
CH3 
>  CH.CH2.COOH.  d.  Tiglinic  acid  CH3-CH=C-COOH.  e.  An 
CH3  I 
CH3 
