1 10 Drs. Blyth and Hofmann on Styrole, 



of hydrochloric acid indicates that the decomposition is pro- 

 ceeding further, by the formation of products of substitution 

 which contain fewer hydrogen equivalents than exist in sty- 

 role ; whereas chlorostyrole is a simple compound of chlorine 

 and sty role, or at least may be considered as such. 



We have frequently prepared and analysed the first pro- 

 duct of the action of chlorine on styrole. The analyses 

 proved however to us that only on one occasion were we for- 

 tunate enough to have hit the proper moment when the action 

 of chlorine must be interrupted. All the other combustions, 

 which we pass over, gave a constantly varying, but always too 

 small a proportion of carbon. 



.inBurned with chromate of lead the following results were 

 obtained : — 



0'3553 grm. of chlorostyrole gave 0*7200 grm. of carbonic 

 acid and 0*1505 of water. 



From which the following formula and theoretical numbers 

 are deduced, C^g Hg Clg. 1 



Theory. Experiments 



I * 1 



,. 16 equivts. Carbon . . 1200 54.*91 55*26 



,'i7 8 ... Hydrogen . 100 4*57 ^'^O, i 



I;,, ; 2 ... Chlorine . . 885*3 40*52 



' ,* 1 ... Chlorostyrole 21^5^ TOO' 



By heating chlorostyrole it is decomposed into a new oily 

 product with evolution of hydrochloric acid. This product, 



which is probably C^g < ^^ >, is obtained in more consider- 

 able quantities when chlorostyrole is distilled with caustic lime. 

 We have not examined it more closely. The formula of 

 styrole derived from nitrostyrole is thus completely supported 

 by the analysis of the bromine and chlorine compounds. .^ 



By the continued action of chlorine for several days on sty- 

 role in direct sunlight, that oil is changed into a thick viscid 

 fluid, with the evolution of a very large quantity of hydro- 

 chloric acid. This substance is not even the last product of 

 the action, as by further continuance hydrochloric acid is 

 still given off. 



The same fact is observed on submitting styrole to the ac- 

 tion of chlorate of potash and hydrochloric acid. 



Action of Heat on Styrole. .^ 



Metastyrole,— The remarkable change experienced by styij 

 role under the influence of heat has been already mentioned 

 in the preceding pages. We stated that in rectifying the oil 

 a considerable portion of pure unchanged styrole passed over 



