^'"Ap?n'i885™"}        Alkaloids  from  Eemijia  Purdieana.  201 
is  decomposed  when  heated  with  it  in  sealed  tubes  at  150°.  It  yields 
two  series  of  salts,  normal  and  monacid.  The  hydrochhride, 
Q^^2i^fi,liQ\,  crystallizes  in  anhydrous  colorless  plates,  readily  sol- 
uble in  alcohol,  very  sparingly  soluble  in  water  (according  to  Arnaud 
it  contains  1  mol.  H2O).  The  platinochloiide,  (Ci9H24lN20)2,H2PtClg, 
is  obtained  as  a  yellow  flocculent  precipitate,  apparently  becoming 
crystalline  after  a  time.  The  hydrohromide,  Ci9H24N20,HBr,  crystal- 
lizes in  long  flat  needles,  sparingly  soluble  in  cold  water.  The  hydri- 
odide,  Ci9H24N20,HI,  forms  long  colorless  flat  needles.  The  thiocya- 
nate,  Cjg  H24^2C^?C'NSH,  forms  colorless  plates  or  short  prisms,  and  is 
very  sparingly  soluble  in  cold  water.  The  nitrate,  Ci9H24N20,HN03, 
forms  short  colorless  prisms,  melts  at  about  195°,  is  sparingly  soluble 
in  cold  water,  readily  in  boiling  water  and  hot  alcohol.  The  normal 
sulphate,  (C,9H24N20)2H2S04,  crystallizes  in  colorless  prisms,  is  readily 
soluble  in  hot  or  cold  water,  very  sparingly  soluble  in  cold  alcohol. 
Its  aqueous  solution  is  dextrorotary :  =  +  36*7°  at  p.  =  2  and 
t.  =3  15 ;  [«]^  =  +  39-8°  at  p.  =  6 ;  and  =  +  39*6°  at  p.  ==  2 
and  2  mol.  H2SO4.  The  add  sulphate,  Ci9El24N20,H2S04,  crystallizes 
in  anhydrous  prisms  and  shows  the  rotary  power  =  +  34*9°  at 
p.  =  2-4  and  t.  =  15°  and  =  +  37-4°  at  p.  =  6.  Th^thio- 
sulphate,  Ci9H24N20,S203H2,  forms  anhydrous  prisms  sparingly  soluble 
in  water.  Acetylcinchonamine,  C19II23ACN2O,  prepared  by  heating  cin- 
chonamine  with  acetic  anhydride  for  some  hours  at  85°,  is  amorphous, 
sinters  together  at  65°,  and  melts  at  80  to  90°,  is  readily  soluble  in 
ether,  alcohol,  chloroform  and  acetic  acid.  Dinitrocinchonamine, 
€191122(^02)2^20,  is  best  prepared  by  dissolving  cinchonamine  in  nitric 
acid  of  sp.  gr.  1*06,  and  pouring  the  intensely  yellow  solution  into  an 
excess  of  very  dilute  ammonia.  It  forms  yellow  flocks,  melts  at  118°, 
is  readily  soluble  in  ether,  chloroform,  alcohol  and  acetic  acid.  A 
solution  in  hydrochloric  acid  gives  with  platinic  chloride  a  yellow  floc- 
culent precipitate  of  the  platinoGhloride,  [C\9H22(N02)2N20]2,H2PtCl6 
+  3H2O. 
Cinchonamine  methiodide,  Ci9H24N20,MeI  -|-  H2O,  prepared  by  add- 
ing methyl  iodide  to  a  solution  of  cinchonamine  in  methyl  alcohol, 
crystallizes  in  hard  colorless  prisms,  readily  soluble  in  alcohol,  spar- 
ingly soluble  in  water.  The  chloride,  Ci9H24N20,MeCl,  is  amorphous. 
The  platinochloride,  (Oi9H24N20MeCl)2PtCl4,  is  obtained  as  a  yellow 
crystalline  precipitate.  The  hydroxide,  obtained  by  the  action  of  silver 
oxide  on  an  aqueous  solution  of  the  chloride,  forms  an  amorphous 
