Van Name and Maryott — Chlorination of Benzene. 165 



Experiment 2. 



Concentrations: Benzene, initially, 1-8777 ; at £=0, 1*7633; 



LiCl, 1-07. 

 Ratio C1 A : Cl s , 42*36 : 57 '64 (mean of three determinations, 41*6 



at t — 0; 41*8 at £=360 ; and 43*7 at end). 

 Electrolysis with 0*20 amp. during periods 2 and 4. 



t- 120 240 360 480 600 



AgCl, mean, -2534 -4428 -6406 '8338 1*0183 1*2181 



Elec. Elec* 



fcXl0 4 = 4*14 4*55 4*70 4*75 5*47 



Experiment 3. 



Concentrations : Benzene, initially, 1*8577 ; at t = 0, 



LiCl, 1*0. 

 Ratio C1 A : Cl s , 41*2 : 58*8, determined at end only. 

 Electrolysis with 0*20 amp. during periods 2 and 4. 



t= 



AgCl, mean, 



&xio 4 = 





 1030 



120 



1824 



240 

 '2661 



Elec. 



1*82 



360 



3609 

 Elec. 

 2*11 1*59 



480 

 4310 



1*8108 



600 

 '5471 



2*71 



Experiment 4- 



Concentrations: Benzene, initially, 1*8161 ; at t=0, 1*7872. 



LiCl, 1-14 ; Chlorine, at end, 1*09. 

 Electrolysis with 0*20 amp. during periods 2 and 4. 



min. 





 120 



240 



360 



480 

 600 



Total CI. 

 AgCl from 



10 cc 



grm. mean 



•0616 

 •1708 

 •1705 



•2847 

 •2822 

 •4061 

 •4049 

 •5256 

 •5262 

 •6501 

 •6559 



0616 

 1706 



2835 



4055 



5259 



6530 



Addition CI. 

 AgCl from 



10 cc 



grm. mean 



not det. 

 0334 -0334 



0540 

 0559 



0803 



1023 

 1047 

 1313 

 1343 



•0549 

 •0803 

 •1035 



•1328 



Percent- 

 age of 

 addition 

 chlorine 



(39-15) 

 39*15 



38*76 



39-60 



39-36 



40-67 



Decrease 



in 

 cone, of 

 benzene 



x 



•0289 

 •0802 



•1339 



•1895 



•2466 



•3012 



fcxlO 4 



2-42 

 Elec. 2-62 



2-80 



Elec. 2-97 



2-95 



each time interval, arid the observed values of this ratio used 

 at the corresponding points in the calculations. 



The absolute values of the constants in the four experiments 

 differ considerably, owing to differences in the concentrations 

 of lithium chloride and of chlorine, and in the time elapsed 



