430 
Benzylidine  Dipiperidine. 
/Am.  Jour.  Pharnu 
t       Sept.,  1893. 
should  contain  but  3872  per  cent.    An  estimation  of  the  platinum 
in  the  salt  prepared  by  Mr.  Tompkins  gave  the  following  results  : 
O  095.4  grams  yielded  00362  grams  of  platinum. 
Calculated  for 
CnHggNoClxoPta  Found. 
3872  p.  c.  37-94  p.  C. 
Gold  Double  Salt. — A  double  salt  of  gold  chloride  and  the  hydro- 
chlorate  of  benzylidine  dipiperidine  was  prepared  in  a  similar 
manner  to  the  platinum  double  salt.  When  analyzed  it  yielded 
the  following  results : 
o  1520  grams  yielded  00592  grams  of  gold. 
Calculated  for  Found. 
C17H28Cl2No2AuCl3 
40-40  p.  c.  38-94  p.  C. 
This  salt  forms  bright  yellow  prisms,  which  are  freely  soluble  in 
alcohol,  chloroform  and  ether,  and  have  a  melting  point  of  183-1850. 
Benzylidine  Dipiperidine  and  Picric  Acid. — If  to  an  alcoholic  solu- 
tion of  benzylidine  dipiperidine  an  alcoholic  solution  of  picric  acid 
be  added  in  molecular  proportions,  and  the  combined  solutions 
filtered  and  set  aside  to  crystallize,  handsome  yellow  crystals  will 
separate  out.  This  compound  when  recrystallized  from  alcohol 
and  analyzed  yielded  the  following  results : 
I.  0-1543  grams  yielded  12  cc.  of  nitrogen  under  a  barometric  pressure  of 
739  mm.,  and  at  a  temperature  of  230  C.  =0*011234976  N. 
II.  0*2010  grams  yielded  under  a  barometric  pressure  of  720-4  mm.  and  at  a 
temperature  of  220  C.  14  cc.  of  N  =0*01505588  N. 
Found. 
Calculated  for  <  1  \ 
C17H26N2C6H2(N02)30H  C23H27N303  I.  II. 
14*30  p.  c.  11*13  7*28  7*01 
This  compound  has  a  melting  point  of  1460  C.  It  is  soluble  in 
alcohol,  chloroform  and  ether,  from  which  it  may  be  recrystallized. 
When  heated  in  the  flame  of  a  Bunsen  burner  it  decomposes  with  a 
slight  explosion,  leaving  a  black  residue.  A  satisfactory  formula 
has  not  yet  been  calculated. 
Amorphous  Sulphur  Compound. — This  compound  was  very  readily 
prepared  according  to  the  method  given  on  p.  85  of  the  "  Proceed- 
ings clthe  Wisconsin  Pharmaceutical  Association  for  1892."  Hydrogen 
sulphide  is  passed  into  a  cold  alcoholic  solution  of  benzylidine  dipip- 
eridine when  the  amorphous  compound  will  separate  out,  and  the 
liquid  assumes  a  deep  red  color,  having  a  strong  odor  of  hydrogen 
