663 
After recrystallisation from alcohol the latter is pure and presents 
the melting-point of 119°. 
The formation of 2-nitro-3-6-dichlor-aniline, melting-point 68°, the 
structure of which has been ascertained through a research of Brir- 
STEIN and KerBarow *), proves that in the crude reaction product 
Cl 
/\NO, 
the 1-4-dichlor-2-3-dinitrobenzene | NO must be present. 
Through prolonged fractionated crystallisation from alcohol this 
could actuaily be separated out of it. It is probably Junerreiscn’s 
isomer 3, and melts at 103°. The structure was proved by replacing 
the NH, group in 2-nitro-3-6-dichloraniline by NO, according to the 
method of KöRrNER and CoNrTARDI ’). 
Hence only the structure formula III] remains for the third isomer 
of the melting-point 119°. This was, however, proved more closely 
in the two following ways: 
Cl Cl Cl 
4. Zane ac. de NH ac. ve ee VANGNO® 
Les ol | 
Se, “NO MZ “NO De NON/ 
Cl Cl 
2 NH, NH, NH ac 
JES HN HENS 
IGA \ANO, NV ANO: 
CI )1 Cl 
NH ac Cl 
NON NON 
> | = lea 
\/N0, \ JNO, 
Cl Cl 
in which the structure of the intermediate products was every time 
determined. 
When we try to separate the three components out of the crude 
nitration-product of JUNGFLEISCH, we succeed by means of very 
prolonged continued fractionated crystallisation from alcohol in 
obtaining the compounds [ and Il in pure state, but not Ill. We 
get at last a pretty considerable quantity of a cauliflowery 
mass, which is no longer liable to further separation by crystalli- 
ij A. 196, 221 (1879). 
3) Atti (5) 22 Il, 632 (1913). 
