Fragmentation patterns can be helpful in distinguishing constitutional isomers. The many isomers of C11H140 include compounds with an aromatic ring and a carbonyl group. One isomer has a strong IR absorption peak at 1700 cm¯1. The mass spectrum shows the molecular ion M at m/z = 162, while the base peak occurs at m/z = 147. Another significant peak is seen at m/z = 43. Which structure is most consistent with this data? A) I II B) II C) II IV D) IV

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**Title: Distinguishing Constitutional Isomers Using Fragmentation Patterns**

Fragmentation patterns can be helpful in distinguishing constitutional isomers. The many isomers of C₁₁H₁₄O include compounds with an aromatic ring and a carbonyl group.

One isomer has a strong IR absorption peak at 1700 cm⁻¹. The mass spectrum shows the molecular ion M at m/z = 162, while the base peak occurs at m/z = 147. Another significant peak is seen at m/z = 43.

**Question:**
Which structure is most consistent with this data?

**Structures:**
- I
- II
- III
- IV

**Options:**
- A) I
- B) II
- C) III
- D) IV

**Explanation of Diagram:**
The diagram shows four different structural isomers labeled I, II, III, and IV, each containing an aromatic ring and a carbonyl group. You need to choose which structure aligns with the provided spectrometric data.
Transcribed Image Text:**Title: Distinguishing Constitutional Isomers Using Fragmentation Patterns** Fragmentation patterns can be helpful in distinguishing constitutional isomers. The many isomers of C₁₁H₁₄O include compounds with an aromatic ring and a carbonyl group. One isomer has a strong IR absorption peak at 1700 cm⁻¹. The mass spectrum shows the molecular ion M at m/z = 162, while the base peak occurs at m/z = 147. Another significant peak is seen at m/z = 43. **Question:** Which structure is most consistent with this data? **Structures:** - I - II - III - IV **Options:** - A) I - B) II - C) III - D) IV **Explanation of Diagram:** The diagram shows four different structural isomers labeled I, II, III, and IV, each containing an aromatic ring and a carbonyl group. You need to choose which structure aligns with the provided spectrometric data.
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