Molecule of a Substance and its Chemical Properties. 9 1 7 



Its chemical formula is the same as that of the anilines, and 

 we may therefore suppose the above equation for the anilines 

 to apply also to pvridin. It is of interest that the value of 



-£- for pyridin is approximately given by the above 



equation, using the values of (A 7 — N + 5H) and (C + 2H) 

 found for the anilines. The value obtained in this war is 

 25*09, which is approximately equal to 23*69, the value given 

 in Table VII. 



Alcohols. 



The chemical formula for each of the two sets of alcohols 

 in Table IX. is + 2H + a(C + 2H), where a is an integer. 

 We would therefore expect that 



A fi -(0 + 2H + «(C + 2H)) = (A 8 -0-2H;-«(C + 2H) 



% 



From the first set we obtain (A 8 — — 2H) =30*58, and 

 (C-f 2H) = 2*635, giving a fair agreement of the calculated 



values of - — 4= with those obtained directly. 

 Z v m, 

 From the second set we obtain (A 8 — — 2H) = 30*08 and 

 (C + 2H) = 2*29. These values do not differ much from those 

 found for the first set. The agreement between the calcu- 

 lated values of - — ^-=~~ and those obtained directly is very 



good. 



XV' 



Table IX. 



Substance, 



T c . 



sV«i. 



T c 



(A 8 -0-2H)-a(C + 2H). 



Isoaniyl alcohol 



579-0 

 5613 



507-6 



3330 



27-84 

 22 38 



17-41 

 20-17 

 22-69 



17-40 

 2004 

 2268 









Amyl alcohol 



621 

 5601 



33-30 



27-84 

 2238 



18-65 

 20-12 

 23-99 



18-53 

 20-92 

 2321 





Propyl alcohol 



536-7 



The values of "— for methyl and ethyl alcohol are 



respectively 44*14 and 30*53. These alcohols do not fit in 

 with the second set, though belonomo- to it. Using the 



