1865.] Destructive Distillation of the Sulphobenzolates. 



III. -349 grm. crystals gave -844 grm. C0 2 and -156 grm. H 2 0. 



IV. '241 grm. crystals gave -259 grm. sulphate of barium. 

 V. -362 grm. crystals gave '385 grm. sulphate of barium. 



VI. -270 grm. crystals gave '293 grm. sulphate of barium. 



I. II. III. IV. V. 



66-18 65-75 65-97 

 4-73 4-62 4-96 



14-74 14-59 



C 12 =144 

 H 10 = 10 

 S = 32 

 O a = 32 



218 



Theory. 



66-06 



4-59 



14-68 



14-68 



100-01 



355 



VI. 



14-89 



This substance was analyzed in the same manner as the sulphide of 

 phenyl, Nos. III., IV., V. being prepared by the nitric acid process, and 

 Nos. I., II., VI. by oxidation with acid chromate of potassium and sul- 

 phuric acid. 



The analysis of this substance leads to the formula C 12 H 10 SO 2 , which is 

 the same as that of the sulphobenzene of Mitscherlich. It differs greatly 

 from that body, however, both in its chemical and physical properties. I 

 shall therefore provisionally call it sulphobenzolene. 



It forms oblique prisms, which are often of large size when prepared by 

 crystallization out of benzol, in which it is rather soluble. The crystals 

 obtained by both the processes above described were kindly measured for 

 me by my friend Charles Brooke, Esq., F.R.S., who states they " are of 

 the same form, the measurements corresponding exactly. They belong to 

 the oblique prismatic system. The measurements must be considered as 

 only approximative, the surfaces of the crystals being imperfect." No 

 planes have been observed to determine the symbol a of the plane lal. 



010 on 001 or 100 94 30 



010 TOO 8530 



010 lal 108 20 



001 TOO 110 20 



It is very soluble in hot spirit, from which it separates on cooling in a 

 manner closely resembling the crystallization of chlorate of potassium. It 

 is also soluble in ether, bisulphide of carbon, and slightly in boiling water, 

 crystallizing out completely on cooling. It melts at 126C., and distils at 

 a much higher temperature. 



Sulphobenzolene dissolves readily in concentrated sulphuric acid, and is 

 not decomposed even when the solution is heated to the boiling-point. 



VOL. XIV. 2 D 



