886 



uiality of acetic acid has disappeared in these compounds; of 

 these compounds and otliers examined by me the group CO, would 

 ahnost give the value which follows from Tk and pk for CO^ , viz. 4,14. 



I choose three of the compounds of CI, and C and H to see in 

 how far the others by means of the values calculated from these, 

 can be derived. 



?"rom the values of Tk and pj, follows: 



Chloric ethyl C,H,C1 = 8,485 



and C,H,C1,= 10,61 



and CHCl, =r 10. 



We liud from this CI — H = 2,175, which means ihat if in these 

 compounds a hydrogen atom is substitnled for the rhlorino atom, 

 the vohime increases by 2,175, a \ahic wliicli was found otpuil to 

 from 2,18 to 2.2 anotliei- time; a second c(|iiatiou is: 



CI,— H, = 1).8D. 



From these two equations follows CI = 2,52 and 11 iz=: 0,345 and 

 we find further C = 2,095, a value ahnost equal to that found before. 



For carbon tetrachloride wc lind 12,175 for with these calcuhited 



values of CI, H. and C, wdiereas the value found directly would be 

 equal to 12.4. But for CCIH, there is no suflicient agreement between 

 observation and calculation, and like other substances which have 

 been derived from CH^ this substance yields a too large value and is 

 evidently associating. I am even astonished that the derivatives that 

 contain more chlorine behave evidently so normally. When we 

 compare the value found for CI witli that of the molecule, viz. 

 4.48, it appears that the binding of C' with CI makes the atom CI 

 larger than is the case with the binding of CI w4th CI. With the 

 values calculated from chlorine compounds we should find: 



CH, = 3.475 



CH., = 2.785 

 When these are comj)ared with those found before: 



CH, = 3.483 

 and CH, = 2.76 



there is reason for us to wonder that the entering of CI into these 



compounds hardly changes the values of C and H, if at all. 



1 shall now proceed to the amine compounds. 



Tic 

 We tind for the ethvl amine compounds the values of — : 



pk 



