A carbon NMR spectrum has peaks at & 113 (1), 60 (2), and 15 (3). The numbers in the parentheses indicate the number of attached protons to each of the carbon signals. Explain why each of the following structures is NOT consistent with this spectrum. CH2OCH3 OCH2CH3 CH3OCH2-C-H CH3CH,0-C-CH3 CH,OCH3 0-CH3

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A carbon NMR spectrum has peaks at δ 113 (1), 60 (2), and 15 (3). The numbers in the parentheses indicate the number of attached protons to each of the carbon signals. Explain why each of the following structures is NOT consistent with this spectrum.

**Structure 1:**
- CH₃OCH₂—C—H
- CH₂OCH₃

**Structure 2:**
- OCH₂CH₃
- CH₃CH₂O—C—CH₃

**Diagrams Explanation:**
The diagrams represent two different organic chemical structures. Each structure depicts a central carbon framework with attached functional groups.

1. **Structure 1**: 
   - Contains an ethoxy group (CH₃OCH₂) and a methoxy group (CH₂OCH₃) attached to a central carbon.

2. **Structure 2**: 
   - Features an ethoxy group (OCH₂CH₃) and a central carbon connected to CH₃ and CH₃ groups.

Both structures need to be analyzed to determine if they can account for the NMR peaks provided, based on the NMR data given. The carbon environments and their associated protons should match the chemical shifts at δ 113, 60, and 15.
Transcribed Image Text:A carbon NMR spectrum has peaks at δ 113 (1), 60 (2), and 15 (3). The numbers in the parentheses indicate the number of attached protons to each of the carbon signals. Explain why each of the following structures is NOT consistent with this spectrum. **Structure 1:** - CH₃OCH₂—C—H - CH₂OCH₃ **Structure 2:** - OCH₂CH₃ - CH₃CH₂O—C—CH₃ **Diagrams Explanation:** The diagrams represent two different organic chemical structures. Each structure depicts a central carbon framework with attached functional groups. 1. **Structure 1**: - Contains an ethoxy group (CH₃OCH₂) and a methoxy group (CH₂OCH₃) attached to a central carbon. 2. **Structure 2**: - Features an ethoxy group (OCH₂CH₃) and a central carbon connected to CH₃ and CH₃ groups. Both structures need to be analyzed to determine if they can account for the NMR peaks provided, based on the NMR data given. The carbon environments and their associated protons should match the chemical shifts at δ 113, 60, and 15.
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