378 
Pelargonium  Oil. 
(  Am.  Jour.  Pharm. 
(      June,  1921. 
Reformatski  *  (Journ.  prakt.  Chem.  Ser.  2,  Vol.  XXXXVIII,  1893, 
pp.  293-314)  thought  they  had  found  in  the  true  Bulgarian  rose-oil 
an  alcohol  of  the  formula  C10H20O,  the  roseol.  This  roseol,  of  the 
rose  as  well  as  the  rhodinol  of  the  pelargonium  should  be  different 
from  the  geraniol.  For  the  rhodinol  this  difference  was  asserted  for 
a  long  time  by  Barbier  and  Bouveault  (Comptes  rendus,  CXVIII, 
1894,  pp.  1154-1157).  They  later  gave  more  exact  accounts  con- 
cerning the  constitution  of  the  substance  (Comptes  rendus,  CXIX, 
1894,  pp.  281-284  and  334-337;  CXXII,  1896,  pp.  529~531)-  Hesse 
(Journ.  prakt.  Chem.,  Ser.  2,  Vol.  L,  1894,  pp.  472-479)  believed  to 
have  found  as  the  principal  element,  of  the  Reunion  oil  and  of  the 
true  German  rose-oil,  an  alcohol,  the  reuniol,  which  should  be,  as 
well  as  the  true  geraniol,  the  true  rhodinol  of  the  French  chemists. 
Erdmann  and  Huth  (Journ.  prakt.  Chem.,  Ser.  2,  LIII,  1896,  pp.  42- 
46),  and  Erdmann  (Journ.  prakt.  Chem.,  Ser.  2,  LVI,  1887,  pp.  1-47) 
denied  the  existence  of  the  reuniol,  which  they  identified  with  the 
rhodinol  and  also  believed  to  be  identical  with  the  geraniol  of  Jacob- 
sen.  According  to  the  researches  of  Bertram  and  Gildemeister  it 
was  finally  found  by  Schimmel  (Ber.,  1895,  I,  pp.  37-39;  1896,  I, 
As  Semmler  accepted  for  his  alcohol  which  he  had  found  in  the  andro- 
pogon-oil  the  formula : 
C3H7 
I 
OH  CH2 
/  I 
H2C  CH 
I  II 
HC  CH 
\  / 
C 
I 
CH3 
Poleck  presumed  (Verh.  Ges.  deutscher  Naturforsch.  u.  Aerzte,  LX1V, 
Vers.  II,  1891,  p.  77),  just  as  Eckart  (Chem.  Untersuchungen  des  deutschen 
und  des  tiirkischen  Rosendls,  in  Ber.  Deutsch.  Chem.  Ges.,  XXIV,  1891,  pp. 
4205-4210),  that  the  rhodinol  which  Eckart  had  found  in  the  true  rose-oil  and 
the  geraniol  were  different.  Compare  also  the  previous  remark  of  Poleck  (in 
Ber.  Deutsch.  Chem.  Ges.,  XXIII,  1890,  pp.  3554-3555),  in  which  he  was 
inclined  to  identify  the  alcohol  of  the  rose-oil  and  of  the  andropogon-oil  (the 
geraniol  of  Semmler). 
2  Compare  also  the  historical  dates  of  the  researches  into  the  true  rose- 
oil. 
