Arricuze II. 
On the Combinations of the Volatile Chlorides with Ammonia, 
and their Constitution. By Professor Hninricu Rose*. 
[From Poggendorft’s Annalen, vol. lii. p. 57, No. 1 for 1841.] 
SOME time ago I compared the compounds of the oxysalts 
with ammonia to the compounds which the same salts form with 
water. I likewise showed that the combinations of ammonia 
with the non-volatile chlorides, which possess so much similarity 
to the oxysalts in most of their properties, might be considered 
analogous to the combinations of the same salts with watert. 
This view, little attended to at first, was subsequently gene- 
rally adopted, especially after Berzelius had called attention to 
the distinction between the compounds of ammonia and of the 
oxide of ammonium. 
I subsequently examined the compounds of the volatile chlo- 
rides with ammonia, and attempted to compare them with those 
which they produce with phosphuretted hydrogen}. Some only 
however of these combinations are analogous to each other in 
properties. It is principally the chloride of titanium, the chlo- 
ride of tin, and the chloride of aluminium which give with 
phosphuretted hydrogen compounds that may be compared with 
those of ammonia. Perchloride of iron, liquid chloride of phos- 
phorus, and chloride of sulphur, which afford combinations with 
ammonia, form none with phosphuretted hydrogen, but, on the 
contrary, they mutually decompose each other. 
Perhaps the combinations with ammonia of the chlorides 
may be more correctly compared with those which water forms 
with them, in the same manner as the ammoniacal non-volatile 
chlorides. The hydrates of the volatile chlorides are, how- 
ever, not yet sufficiently known, but they have this in common 
with the analogous ammoniacal compounds, that the water or 
the ammonia cannot be separated from either by exposure to 
* Translated and communicated by Mr. William Francis; A.L.S. 
+ Poggendorff’s dnnalen, vol. xx. p 147. 
+ Ibid., vol, xxiv. p. 109. 
