Boiling •Points of Homologous Compounds. 

 Table III. 



37;* 









Alcohols: C H 2/t+1 -OH. 





Normal Primary. 



Normal Secondary. 



Primary Iso. 



n. 



T. 



Calc. 



o-c. 



T. Calc. O-C. 



T. Calc. O-C. 



1. 



337°7 



335-5 





 +2-2 











351-3 



354-2 



-2-9 



00 





3. 



370-2 



372-8 



-26 



355-45 354-16 +1-3 





4. 



389-9 



391-4 



-1-5 



373-0 372-8 4-02 



38105 382°12 -Tl 



5. 



411-0 



410-1 



+0-9 



392-0 3914 4-06 



40505 400-76 4-4-3 



6. 



4310 



428-7 



4-2-3 



409-0 4101 -11 



423-0 4194 4-3-6 



7. 



4490 



447.4 



4-16 



437-5 428-7 4-8-8 



4370 438-0 -TO 



8. 



4640 



4660 



-20 



452-0 447-4 4-4-6 





9. 



486-5 



484-6 



4-1-9 







10. 



5040 



5033 



-fO-7 







The calculated are compared with the observed values in 

 Table III. A serious error in one of the latter is plainly 

 evident in the secondary series, recognized by Young. The 

 run of the residuals in the iso-group may point to curvature. 

 But as a whole the experimental results appear to be in 

 better accord with a linear than any other formula. The 

 constant 18°' 64 agrees with Kopp's original ideas, and it 

 may be noticed — though this may be accidental — that, as in 

 the case of the hydrosulphides, the constants additive to n 

 are simple. This point is perhaps further illustrated by the 

 aldehydes and amines, which can be represented by : 



Aldehydes: T = 26°76 (n + 10), 

 Amines: 26'76 (w + 9), 



as shown in Table IV. The lowest member of the aldehyde 

 series is quite anomalous, and the amines may show a slight 

 curvature. But the simple linear formula is clearly not 

 without its uses in representing the facts. 









Table IV. 









ldel 



lydes : 



^i-tUn-f-l - 



-CHO. 



A 



mines 



: cyi^+i— NH 



n. 



T. 



Calc. 



o-c. 





T. 



Calc. 



O-C. 



0. 



252°-0 



267-6 







-156 













1. 



293-8 



294-4 



- 0-6 





267-0 



267-6 



-6-6 



2. 



3220 



3211 



4- 0-9 





291-7 



294-4 



-2-7 



3. 



347-0 



347-9 



- 0-9 





322-7 



3211 



4-1-6 



4. 



376-0 



374-6 



4- T4 





348-5 



347-9 



4-0-6 



5. 



400-9 



401-4 



- 0-5 





3760 



374-6 



4-1-4 



6. 



4280 



428-2 



- 02 





402-0 



401-4 



4-0-6 



7. 











4270 



428-2 



-1-2 



