Theory of Molecular Volumes. 747 



The curves are very similar to each other, showing that 

 whatever may be the total length of the chains the effect of 

 symmetry is the same. 



The following is a list of the symmetrical esters : — 



Volumes of the Symmetrical Esters. 



Compound. 



W. 



M.V. 



V/W. 



A. 



C-H 15 — CO . 0- C 8 H 17 



C 7 H 15 — CO . 0— C 7 H 15 



C G H 13 -CO.O-C 7 H 13 



101 

 95 



89 



53 

 47 



29 

 17 



404-3 

 377-0 

 350-2 



4-001 



3-968 

 3-935 



0-033 

 0-033 



6x0033 

 2x0030 



C 3 H 7 -CO.O— C,H 9 



H\— CO.O— C 3 H- 



1978 

 150-6 



1061 

 62-7 



3732 

 3673 



3-659 



3-688 



2 H.-00 . 0— C 2 H 5 



H.COOCH3 







The Values of V/W 



among 



the Symmetrical Esters. 

















































3-90 











































3-90 











































I 

 3-70 











































O.CA 























10 30 50 70 90 



Number of H Equivalents 



110 



The most important feature of this curve is the rectilinear 

 character of the portion succeeding the minimum. 



