1870.] 



Phenyl and Parasulphobenzine. 



543 



Theory. I. IT. III. IV. Mean. 



C la = 144 77-41 77 13 7773 .. .. 77'43 



H 10 = 10 5-38 5-19 5-15 ... .. 5-17 



S = 32 1721 .. 17-43 17*37 17*40 

 186 100-00 

 This corresponds to the empirical formula C la H 10 S. 



Parasulphide of phenyl crystallizes from alcohol in small white needles, 

 which melt at 94° C, and can be distilled at a very high temperature. It 

 is insoluble in water, but rather soluble in bisulphide of carbon, ether, and 

 benzol. 



Parasulphobenzine. — When parasulphide of phenyl was digested for 

 several hours with dilute sulphuric acid and acid chromate of potassium, it 

 was gradually converted into a new substance, having a much higher 

 melting-point, so that the completion of the oxidation was readily observed 

 by the entire disappearance of the fused parasulphide. The crude para- 

 sulphobenzine was then collected, well washed with water, and purified by 

 two or three crystallizations out of boiling alcohol. 



I. -194 grm. substance gave *470 grm. carbonic anhydride and *075 

 grm. water. 



IT. '347 grm. substance gave '843 grm. carbonic anhydride and • 138 

 grm. water. 





Theory. 



t 



II. 



Mean. 



C 10 =144 



G6-06 



66-09 



66-27 



66-18 



K= 10 



4-58 



4-30 



4-42 



4-36 



S = 32 



14-68 









0 o = 32 



14-68 

 100-00 







• • 



These carbon determinations correspond with the formula C 12 H 10 S0 2 ; 

 it has therefore the same percentage composition as the sulphobenzine ob- 

 tained by the oxidation of sulphide of phenyl*. 



Parasulphobenzolene melts at 230° C, is soluble in boiling alcohol, from 

 which it crystallizes on cooling in the form of long white shining needles. 

 It is insoluble in water, soluble in benzol, ether, and carbon disulphide. It 

 dissolves readily in warm sulphuric acid, forming a colourless solution, and 

 does not blacken even when heated to the boiling-point of the acid. 

 "Water precipitates it unchanged. It is also soluble in hot strong nitric 

 acid without change, and crystallizes out on cooling. 



* Proe. Roy. Soc. vol. xiv. p. 351. 



2s2 



