ON THE ANTIMONY OXYCHLORIDES. 



65 



dissolved out by washing with carbon disulphide. The 

 calculated percentage of pentoxide contained in this com- 

 pound is 7*68; on heating 2*517 grms. of the oxychloride 

 in a tube retort, a residue of 0*1799 grm. of pentoxide 

 remained, corresponding to a percentage of 7*14. 



The second oxychloride formed by heating the mixture 

 of one molecule of pentoxide and three of pentachloride, is 

 produced only in small quantities, as yellowish crystals. To 

 obtain it in the pure state, that portion of the tube in which 

 the substance is found is cut off, and, after the tube has been 

 resealed, it is placed in a slanting direction in a vessel con- 

 taining water heated from 85 to 90 . The Sb 3 C1 I? O melts 

 and runs down, leaving the other less fusible oxychloride 

 behind ; this is then dried on a porous plate in vacuo over 

 solid caustic potash. Two determinations showed that the 

 melting-point of this substance is 95°*5 C. On analysis, the 

 following results were obtained : — 



(A.) Antimony -determinations. 



Weight of 

 Prepara- substance 



tion. Method. taken. 

 No, 1. 1. 0*8170 gave 0.5534 Sb 2 4 . 



No. 2. 1. 0-4225 gave 0*3245 sulphide, i 



of which 0*2972 gave 0*2656 Sb 2 4 . J 



Percentage 



of antimony. 



53-66 



54-12 



Mean of two antimony-determinations 53*89 Sb. 

 (B.) Chlorine-determinations, 



(Chlorine precipitated in filtrate from antimony-determination.) 



Prepara- 

 tion. 



Weight of 



substance 



taken. 



Weight of 

 AgCl. 



Weight of 

 Ag. 



Percentage 

 of chlorine. 



1. 



1. 



1. 



2. 



0*1240 

 0*2385 

 0*2850 

 0*1676 



0*1645 



o*345o 

 0-4050 

 0*2370 



0*0135 

 o"oo6o 

 0-0140 

 o - ooo8 



36-48 

 36*61 



3 6 '77 

 36*49 



Meau of four chlorine- determinations 36*58 CI. 



SER. III. vol. v 



