90 



REPORTS ON THE STATE OF SCIENCE 



Table I. 



Eatio of-—— — _ from Interaction of Chlorine and Anilide. Ts 15°. 



Cnloroanuide 



The N-chloro-derivative slowly disappears and is replaced by the 

 chlorinated anilide. 



The conversion of the chloroamine in the presence of hydrochloric 

 acid, on the other hand, is a slow, regular, apparently monomolecular 

 reaction, the speed of which is, in dilute (below 50 per cent.) acetic 

 acid, proportional to the square of the concentration of the hydrochloric 

 acid. Table II. shows, however, that this relation only holds within 

 narrow limits. 



Table II. 



Under ' n ' is given the values from the equation 



HC1" 





whence 



n = log 



V. 



"HC1"'' 



loj 



HC1 

 HC1'' 



Further, the apparently monomolecular character of the reaction is not 

 maintained througbout the change. The product, the chlorinated 

 anilide, even when incapable of further chlorination, exerts a disturbing 

 influence causing a decrease of the rate. This is well shown in the 

 case of p-chloroacetylchloroaminobenzene, which yields 2 : 4-dichloro- 

 acetanilide. 



