Answer:
See explanation
Explanation:
In this case, we have to remember the meaning of the nomenclature "18:2Δ9,12". Where 18 is the number of carbon atoms, 2 is the number of double bonds, and the numbers successive to Δ "delta" the position of the double bonds starting to count from the carboxylic -COOH end of the molecule.
In other words, the main functional group is a carboxylic acid. We have a total of 18 carbons. Additionally, we have 2 double bonds. On carbons 9 and 12.
Lets see figure 1
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The structure that represents the 18‑carbon fatty acid designated 18:2(Δ9,12) is the lenoleic acid.
Cis configuration is a kind of geometrical isomers in which any two groups of any compound will present on any one side or same side of the compound.
The notation 18:2(Δ9,12) describes that, in the desired fatty acid total number of carbon atoms are 18, number of double bonds are 2 and these bonds are present on the 9th and 12th position of the fatty acid. Let in the desired acid carboxylic functional group is present, so the structure of their cis configuration is shown in the attached figure.
Hence, desired structure of fatty acid is of Linoleic acid.
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