382 



Messrs. R. Anschutz and P. N. Evans. [June 16, 



Calculated Found. 



for f " ^ 



SbCl 5 H 2 0. 1. 2, 3. 4. 5. 6. 7. 8. 



CI... 55-90 55-26 55-52 55-48 _____ 



Sb . . 38-42 — — — 38-53 38-08 37-69 — — 



H... 0-63 ______ 0-93 0-94 



. . . 5-04 



99-99 



We provisionally designate this body as antimony pentachloride 

 monohydrate, withonfc expressing any opinion concerning the con- 

 stitution of this addition product of equal molecules of water and 

 antimony pentachloride. From chloroform, the monohydrate crys- 

 tallises in leafy or feathery crystals resembling sal-ammoniac, having 

 a melting point lying between 87° and 92°. If exposed to the air it 

 deliquesces to a clear liquid, which over sulphuric acid gradually 

 crystallises again in broad needles, described by Daubrawa as a 

 property of his supposed oxychloride. We have not further examined 

 this body. 



When one tries to distil the antimony pentachloride monohydrate 

 under diminished pressure — under 20 mm. with the bath at 105° — a 

 mobile yellow liquid distils over; this, after two rectifications, boiled 

 constantly at 73° under 17 mm. (bath 90°). Two chlorine determina- 

 tions gave, as was expected, results for antimony pentachloride. 



1. 0-2510 gram substance gave 0'5965 AgCl. 



2. 0-2879 „ „ 0-6885 AgCl. 



Found. 



Calculated for , A N 



SbCl 5 . I. II. 



CI ... . 59-24 58-80 59-15 



There separated from a fraction boiling somewhat higher crystals 

 of antimony trichloride, leaving a residue of a waxy consistency 

 which could not be distilled. 



22-7 grams SbCl 5 H 2 gave 12 8 grams SbCl 5 . 



,, ,, l'l grams SbCl 3 . 



,, „ 6"4 grams residue. 



2-4 loss. 



Although after this experience it was not probable that we could 

 obtain antimony oxychloride, SbOCl 3 , by heating antimony penta- 

 chloride monohydrate, we repeated the experiment in another form. 

 We heated 24"4 grams of antimony pentachloride, mixed with about 

 twice its volume of chloroform and T4 gram water, in a closed tube 

 to 100° on a water- bath. The crystals of the monohydrate which 



