Give the systematic name, Δ-x name, and the ω-x name for the following lipids.
Understand the Problem
The question is asking for the systematic name, Δ-x name, and ω-x name for certain lipids represented in the image. This involves identifying the chemical structures and providing the requested nomenclature for each lipid.
Answer
First: Hexadecanoic acid, None, None. Second: Octanoic acid, None, None. Third: 9-Octadecenoic acid, Δ9, ω9. Fourth: 5,8,11,14-Eicosatetraenoic acid, Δ5,8,11,14, ω6.
First structure:
- Systematic name: Hexadecanoic acid
- Δ-x name: None (saturated fatty acid)
- ω-x name: None
Second structure:
- Systematic name: Octanoic acid
- Δ-x name: None (saturated fatty acid)
- ω-x name: None
Third structure:
- Systematic name: 9-Octadecenoic acid
- Δ-x name: Δ9
- ω-x name: ω9
Fourth structure:
- Systematic name: 5,8,11,14-Eicosatetraenoic acid
- Δ-x name: Δ5,8,11,14
- ω-x name: ω6
Answer for screen readers
First structure:
- Systematic name: Hexadecanoic acid
- Δ-x name: None (saturated fatty acid)
- ω-x name: None
Second structure:
- Systematic name: Octanoic acid
- Δ-x name: None (saturated fatty acid)
- ω-x name: None
Third structure:
- Systematic name: 9-Octadecenoic acid
- Δ-x name: Δ9
- ω-x name: ω9
Fourth structure:
- Systematic name: 5,8,11,14-Eicosatetraenoic acid
- Δ-x name: Δ5,8,11,14
- ω-x name: ω6
More Information
The systematic name indicates the full IUPAC name, while the Δ-x and ω-x names locate double bonds from the carboxyl and methyl ends of the fatty acid chain, respectively.
Tips
A common mistake is confusing the counting from the carboxyl end (Δ nomenclature) with counting from the methyl end (ω nomenclature).
Sources
- Fatty acid - Wikipedia - en.wikipedia.org
- 2.3: Lipids - Medicine LibreTexts - med.libretexts.org
- 2.33 Fatty Acid Naming & Food Sources | Nutrition Flexbook - courses.lumenlearning.com
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