Chem 116Dr. O.
The Notation and Structure of Fatty Acids
Consult the Table to answer the questions below.
Notation
12:0
14:0
16:0
18:0
16:19
18:19
18:29,12
18:39,12,15
20:45,8,11,14
common name
systematic name
Lauric acid
dodecanoic acid
Myristic acid
tetradecanoic acid
Palmitic acid
Hexadecanoic acid
Stearic acid
Octadecanoic acid
Palmitoleic acid
Hexadecenoic acid
Oleic acid
9-Octadecenoic acid
Linoleic acid
9,12-Octadecadienoic acid
-Linolenic acid
9,12,15-Octadecatrienoic acid
arachidonic acid
structure
CH3(CH2)10COOH
CH3(CH2)12COOH
CH3(CH2)14COOH
CH3(CH2)16COOH
CH3(CH2)5CH=CH-(CH2)7COOH
CH3(CH2)7CH=CH-(CH2)7COOH
CH3(CH2)4(CH=CHCH2)2(CH2)6COOH
CH3CH2(CH=CHCH2)3(CH2)6COOH
you draw it!
1. What information is given by the notation in the left column (12:0, 16:0, etc.)?
2. What information is given by the delta sign and superscripts in the left column (9, 12, 15 etc.)?
a. Draw a bond line structure for Oleic acid (eliminate the parentheses).
b. Draw a bond line structure for Linoleic acid (eliminate the parentheses).
c. Draw a bond line structure for - Linoleic acid (eliminate the parentheses).
3. Draw the structure of arachidonic acid based on the notation from the left column.
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