COMBINATIONS OF CHLORIDES WITH AMMONIA, bu 
heat, and that the volatile chlorides cannot be easily re-pre- 
pared from them. 
The volatile combinations of chlorine take up various quanti- 
ties of ammonia, but just as little as the quantity of water of 
crystallization can be determined a priori by any law, or of am- 
monia, in their combinations with oxysalts, or with non-volatile 
chlorides, can the amount of ammonia which the volatile chlo- 
rides are able to take up be predicted in advance. The some- 
what empirical rule, however, appears to be followed, if we com- 
pare the different combinations with one another, that those chlo- 
rides whose radical forms with oxygen a stronger acid can take 
up more ammonia than those the radical of which produces 
with oxygen so weak an acid that it does not enter into any de- 
cided salt-like combination with ammonia. 
A comparison of the compositions of the compounds with 
ammonia of the volatile chlorides which have hitherto been ex- 
amined may make this assertion probable. I shall divide these 
combinations into two classes; the first class will comprise 
those combinations the chlorides of which correspond to weak 
acids; the second class those whose chlorides correspond to 
more powerful acids. 
First Crass. 
1. Chloride of titanium-ammonia ; Ti Cl? + 2N H?® according 
to my examination*, Ti Cl’ + 3 N H® according to Persozt. 
2. Chloride of tin-ammonia; Sn Cl? + N H? according to 
my examination}, Sn Cl? + 2 N H® according - to Persoz. 
3. Chloride of aluminium-ammonia ; AICI + 3 N H?® accord- 
ing to my examination, agreeing with that of Persoz §. 
4. Perchloride of iron-ammonia; Fe Cl? + N H® according to 
my examination ||. SE Rape 
5. Chloride of sulphur-ammonia; 8 Cl + N H? according to 
my examination J. a at 
6. Chloride of antimony-ammonia; Sb Cl? + 2 N H? accord- 
ing to my examination **, iad ae 
* Poggendorff’s Annalen, vol. xxiv. p. 145. 
+ Annales de Chimie et de Physique, t. xliv. p. 321. Persoz states that the 
combination contains in one hundred 65° 861 chloride of titanium, and 34:139 
ammonia. A composition calculated according to the formula above given con- 
tains in one hundred 64°89 chloride of titanium, and 35°11 ammonia. 
t Poggendorff’s Annalen, vol. xxiv. p: 163. 
§ Tbid., p. 298. || Ibid. p.301. YF Ibid., p.806. #* Ibid., vol, xx. p. 160. 
VOL. JII. PART Ix. D 
