198 
IOWA ACADEMY OF SCIENCE 
for about one-baK hour, a yellow colored solution is produced. 
If the excess of phosphorous oxychloride is distilled off with 
care, an air blast being used to help the process, a thick brown- 
ish oil is left, which after being cooled and treated with water 
to remove phosphoric acid, becomes a bright yellow powder. 
This powder is the dianil. 
The dianil of o-sulphobenzoic acid was made and analyzed by 
Eemsen and Hunter.^® The formula assigned to the compound 
was — 
C^NCeHs 
\ 
NC6H5 
/ 
SO, 
-C^NCeHs 
TSTP TT corresponding to 
/ ® ^ which we have 
-SO, 
CH, 
NO, 
The basis of the formula is found in the work of several in- 
vestigators. Hoogewerff and Van Dorp,^*^ using phosphorous 
oxychloride or acetyl chloride, effected the formation of isoi- 
mides, by treating the amino derivatives of certain dibasic 
acids. 
CO • NHR 
p>/ + CH 3 COCI 
\ > 
COOH 
C=NR 
\OH -f CH 3 COCI 
> 
COOH 
C=NR 
T^/ \OH 4- CH 3 COCI 
> 
COOH 
C-NR 
Jesurun^^ used practically the same reaction upon the ortho 
cyan benzene sulphone chloride, and obtained what appear to 
be analogous results. 
^°Loc. cit. 
20L0C. cit. 
2iBer. 26, 2292, 1893. 
