252 On the Properties of Telluramyl and Selenmethyl. 
: ¥ 
ated product ee: : Se2O; may be another acid forming salts 
of the formula Sadat t Se2Os: or + ees : SezO+ may with 
H;:0 
HO 
with the excess of RO present, salts of the simple acid. The 
latter appears to be the more probable view. 
romine Compound.—By adding hydrobromic acid to the 
chlorinated body, a very slight white precipitate is formed, which 
redissolves on heating: by evaporation, a crystalline substance 18 
obtained, which melts and is probably decomposed considerably 
under 100° C., forming a black oil resembling bromine: on cool- 
ing this hardens to a black semi-crystalline mass, nearly insoluble 
both in water and alcohol, but somewhat soluble in ether, which 
dissolves out a substance crystallizing in transparent yellow 
plates. By adding to the solution of the chlorine compound 
free hydrobromic acid, aud allowing the solution to evaporate by 
exposure to the air, beautiful, transparent, flat yellow prisms are 
obtained, which easily decompose by contact with organic sub- 
stances; from the mother liquor, sulphite of ammonia precipl- 
tates a splendid. scarlet. oily body, together with free selenium. 
The crystals obtained by spontaneous evaporation are without 
doubt a substitution. bromine compound, probably of the formula 
=. ' Se:Os. They are very soluble in ammonia, and form 
RO form RCi and regenerate the acid “ Se2Ou:, forming, 
a crystalline salt, from which potassa sets free ammonia. _ 
The bromine compound on heating melts, and burns with the 
same appearances as the chlorine compound. j aa 
Iodine Compound.—On treating the preceding bodies with 
oil, with a shining greenish metallic luster, of extremely dist 
greeable odor: it is quite soluble in an excess either of hrydriodi¢ 
acid or iodid of potassium, slightly soluble in water, to which I 
imparts an orange-yellow color, quite soluble in aleohol: by _ 
ing the alcoholic solution to spontaneonsly evaporate, it passes 0” 
with the alcohol vapors, leaving no residue. On allowing er 
oily precipitate to stand for some time in a closed tube, part 
it appeared to become solid, as if crystals were formed in the 
oily mass; but I was unable to study their properties. 
~ On one occasion by adding a solution of iodid of potassium é 
a solution of the first acid, (obtained by the action of nitric a¢ 
0 methyl,) a precipitate was formed, which redissolved 0” 
, and by evaporation was obtained in fine red crystals : 
* 
=, Ge 5 a eeremey ee ee 
So eee eNOS ne eae ee ee ae 
