Dispersion in Relation to the Electron Theory. 473 



Selecting n. propyl alcohol for the determination of the 

 value of (OH), we have 



B^ = 3-768, « D = 1-3854, 



14-867 = 2(CC) 2 + 7(CH) 2 -f(CO) 2 + (OH) 2 , 



whence (OH) 2 = 1'376. 



In the case of the carbonyl group we cannot separate the 

 values of P for the two linkages, and can only determine 

 the sum of the squares. In this and other cases of unsatu- 

 ratiori the summation may be indicated by prefixing X. 



Choosing propionic acid for this, 



R w = 3-462, n-n = 1-3866, 



13-648 = 2(CC) 2 +5(OH) 2 +(CO) 2 + (OH) 2 + ^(CO) 2 , 

 which gives 2 (CO) 2 = 2-443. 



Using the above values we may calculate the value of B, w , 

 if the value of n^ is known, for organic compounds involving- 

 only these linkages. 



Table VII. 



Substance. 



n T>- 



K (° bs -)- 



H w (calc). 



Diff. 



Pentane 



1-3581 ' 



1-3754 



1-3963 



' 5-638 

 6-670 



8-722 



1-640 

 2-780 

 3-768 

 4-760 

 4-093 

 4-799 



5-638 

 6-670 



8-724 



1-757 



2-752 

 3-768 

 4-785 

 3-944 

 4-79S 



ref. 



ref. 



+ •002 



Hexane 



Octane 





Methyl alcoh ol 



1-3-294 

 1-3623 

 1-3854 

 1-3991 

 1-4729 

 1-3529 



+ •117 

 -•028 



ref. 

 + •025 

 -•149 



ref. 



Ethyl alcohol 



n. Propyl alcohol 



n. Butyl alcohol 



Glycerine 



Ethyl ether 





Formic acid 



1-3714 

 1-3718 

 1-3866 

 1-3979 

 1-4043 

 1-4215 

 1-3930 

 1-3316 

 1-3636 

 1-3591 



1-3610 



1-3889 

 1-3598 



1-671 

 2-525 

 3-462 

 4-472 

 5-513 

 7-552 

 4-444 

 2-385 

 3-332 

 3-514 



1-501 

 2-464 

 3-462 

 4-469 

 5-474 

 7-534 

 4-454 

 2-429 

 3439 

 3-428 



-•170 



-•061 



ref. 

 -•003 

 -•039 

 -•018 

 + •010 

 + •044 

 + •107 

 -086 



+ •193 

 + •197 

 + 001 

 + •084 

 + 103 

 + 062 

 -•197 

 + •067 



Acetic acid 



Propionic acid 



Butyric acid 



Valerianic acid 



(Enanthylic acid 



i. Butyric acid 



Acetaldehyde 



Propaldehyde 



Acetone 



Methyl acetate 



3-362 

 5-374 

 3-551 

 4462 

 6477 

 7-500 

 6-654 

 5-487 



3-555 

 5-571 

 3-552 

 4-546 

 6-580 

 7-562 

 6-457 

 5 - 554 



Methyl butyrate 



Ethyl formate ... 



Ethyl acetate 



Ethyl bntvrate 



1-3726 

 1-3960 

 1-3970 



Ethyl valeriate 



Ethyl oxalate 



1-4104 

 1-3844 



Propyl acetate 





