379 
appendix 
For the preparatioir of f. and m. amino-phenyl-stibmic acid we 
Kd the method previously adopted by Michaehs'^ for t e 
production of Di-methyl-amino-phenyl-arsenic acid, employing, 
however, antimony trichloride instead of arsenic trichloride. 
Antimony trichloride was treated with aniline, and the compoun 
H N. C H,. SbCL obtained, whieh changed in the presence of alkali 
into the* corresponding hydroxide. This formed, on treatment with 
hydrogen peroxide in an alkaline solution, aryl-stibinic acid. Ihe 
process is expressed chemically as follows: 
(I) H.N • + SbCh = H,N ■ C,H, . SbCl, + HCl 
(II) H,N • C.H, ■ SbCh -f 3 KOH = H,N • ■ Sb<Q^ 
= H.,N • Cr.H, ■ SbO • + H3O 
/OH (Arylstibinic 
(III) H,,N • • SbO + H, 0 , = H^N • C«H, • SbO^^Q^ acid) 
It IS a remarkable fact that on adding aniline to ’"f 
trichloride, p. amino-phenyl-stibinic acid (I) is formed while, on the 
other harid if antimony trichloride is added to boa.ng aniline, 
amino-phenyl-stibinic acid (IT) is obtained. 
^<OH 
po<y“ 
-OH 
III 
i 
\^sbo<;^QH 
NH, 
NH, NH., 
For the preparation of u. amino-phenyl-stibmie acid (III) we use 
\inar-. reaction, treating 0. chloran.line with antimonic acid. 
Preparation of p. amino-fhenyl-stihinic aetd. 
Thirty grammes of ^ ^^^0 grammes of 
carefully dried flask for about m-^es.^-d 
aniline added in three portions. in precipitate 
15 minutes and then poured into 500 c.c. o w ^ ^ 
which is formed is collected on a filter paper .and *en^ 
solution of sodium carbonate, which disso ves ree a for three 
is then boiled with 8o c.c. of strong potassium hydrate (25 I 
