Multiple Choice
A triacylglycerol molecule in the form of linoleic acid consumes 2 moles of hydrogen gas. Which of the following fatty acid represents the product formed?
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32. Lipids
Triacylglycerol Reactions: Hydrogenation
Multiple Choice
Determine a possible triacylglycerol molecule formed when linoleic acid undergoes partial hydrogenation and consumes 1 mole of hydrogen gas.
A
Palmeitoleic acid
B
Stearic acid
C
Linolenic acid
D
Oleic acid
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Verified step by step guidance1
Identify the structure of linoleic acid, which is an 18-carbon fatty acid with two cis double bonds at the 9th and 12th carbon positions.
Understand that partial hydrogenation involves the addition of hydrogen (H₂) to some of the double bonds in unsaturated fatty acids, converting them into single bonds.
Recognize that consuming 1 mole of hydrogen gas (H₂) will reduce one of the double bonds in linoleic acid, converting it into a single bond.
Determine which double bond is reduced. In partial hydrogenation, typically the least stable double bond is reduced first. In linoleic acid, this would be the double bond at the 12th carbon position.
After the reduction of one double bond, linoleic acid is converted into oleic acid, which has a single cis double bond at the 9th carbon position, making it a monounsaturated fatty acid.
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