284 
duct which: we sueceeded in isolating from the ethereal solution 
containing the crude disazocompound; we mentioned already yellow 
crystals, the primary product of the reaction which up to now could 
not be isolated. But there is still a third substance formed in very 
minute quantities, the nature of which is not yet cleared up. It 
might be either an oxidationproduct of the disazocompound or its 
formation might indicate that haemopyrroline, obtained by destila- 
tion with steam is not a homogenous substance but a mixture of 
two substances of which each is able to combine with diazonium 
compounds. Judging from its properties and the mode of isolation 
the first mentioned view appears to be more probable. This sub- 
stance can be isolated by working up the mother liquors of the 
chief product of the reaction (m. p. 233°). It erystallizes in beauti- 
ful copper-red crystals, possessing metalic lustre, dissolving in alco- 
hol, chloroform and ether with diffieulty, yielding blue solutions. 
Haemopyrroline and Toluenediazoniumchloride. 
Haemopyrroline - disazo- ditoluene may be obtained in exactly 
the same manner as the corresponding benzene derivative. Also in 
this case we noticed the primary vellow product, which is changed 
into brown crystals of the disazocompound and from the mother 
liquor we succeeded in isolating a very small quantity of copper- 
red crystals. possessing metalie lustre and dissolving in organic 
solvents with a blue colour. 
The hydrochloride of haemopyrroline-disazo-ditoluene erystalli- 
zes exactly in the same manner as the hydrochloride of haemo- 
pyrroline-disazo-dibenzene and melts at 254. It dissolves in organic 
solvents with a reddish violet colour and yields with caustic soda 
the free azodye, easily soluble in ether. alcohol and so forth. The 
sulphurie aeid solution is at first blue, but after some time the colour 
changes to reddish violet. The speetroskopie properties are very 
much like those of the benzene derivative. Analyses: 
OPERA TE COMTE 
Found Caleulated for C,, H,; N; CI 
N: 173720), 176904 
It may he mentioned that 15 g of haemin gave 03 g of pure 
haemopyrroline-disazo-ditoluene hydrochloride. 
