Antimony pentaehloride

Antimony pentaehloride forms the hexaehloroantimonate (V) ion with concentrated solutions of chlorides yielding numerous stable double salts (RCl SbClB or RSbCl ) especially if the cation is large. 

Chromyl chloride fumes in air owing to the fact that it is decomposed by water into chromic and hydrochloric acids. The fumes when introduced into a Bunsen flame exhibit a characteristic spectrum. When sufficiently purified by distillation, and free from access to moisture, chromyl chloride may be kept unchanged for a considerable time, though on very long standing some dark coloured solid— probably a polymeride—is deposited. This tendency to polymerise is also suggested by the results of cryoscopic molecular weight determinations in carbon tetrachloride, tin tetrabromide, or antimony pentaehloride. 

The liquid phase reactions for the produetion of HFC-32 involves the reaetion of diehloiomethane with hydrogen fluoride in presenee of antimony penta-ehloride/tinchloride or titanium tetraehloride [49], antimony pentaehloride, [50,51], SbCljFj [52] and tin ehloride [53] as indicated in Fig. 11.5. The reaetion temperature are in the range of 50-150°C and pressure is in the range of 6-60 atmospheres. 

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