230 



III. CHEMISTRY OF NEUTRAL FATS 



fatty acid content. The 6 possible mixed triglycerides would be as fol- 

 lows: Lo, Lo, S (2); Lo, Lo, 01 (2); Lo, Lo, Ln (2); Ln, Lo, 01 (3); Ln, 

 Lo, S (3) ; S, 01, Lo (3). The figures in parentheses represent the number 

 of positionally different forms, while the symbols represent the following: 

 Lo, linoleic acid; Ln, linolenic acid; 01, oleic acid; and S, saturated acids. 

 Doerschuk and Daubert^^'' postulate that, according to the pattern of 

 partial randomization, acids present in a concentration of less than 33% of 

 the total acids may occasionally occur to the extent of 2 molecules in a 

 single triglyceride. On the basis of the "even" distribution theory, this 

 could not occur. Moreover, acids present in amounts of 33 to 67% which, 

 according to the "even" distribution pattern, must occur in every molecule 

 at least once, may actually be absent in some cases from triglycerides, on the 

 basis of the new hypothesis. Under such circumstances, 14 constitutionally 

 different simple and mixed triglycerides would occur in varying proportions. 



Table 20 

 Comparison of Triglycerides Found in Corn Oil with Those Calculated from 

 Fatty Acid Composition on Basis of Different Theories for Triglyceride 



Structure" 



" Adapted from A. P. Dueischuk and B. F. Daubert, J. Atn. Oil Chemists' Snc, 25, 

 425^33 (1948). 



Ln = linolenic acid; Lo = linoleic acid; 01 = oleic acid; S = saturated acid. 



