8 d, 1H d, 1H АН. в н C E CH3 Н F CH3 Н CH3 D molecule 1 CH3 TCH3 H CH3 S, 3H s, 2H 2H, q 3H, S 2 9H, s 3H, t

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Assign the peaks in the 1H NMR shown below to the correct protons in molecule 1. 

### NMR Spectroscopy of Molecule 1

#### Chemical Structure
The image shows the chemical structure of an organic compound labeled as "molecule 1." The structure includes the following groups and atoms:
- A benzene ring with hydrogens labeled A and B.
- Two methoxy groups (O-CH₃), labeled E and F.
- A carbonyl group adjacent to the benzene ring.
- Several methyl groups branching from the main structure.

#### NMR Spectrum
The spectrum is a typical ¹H NMR (nuclear magnetic resonance) spectrum, providing insights into the different types of hydrogen environments present in the molecule. The x-axis represents the chemical shift in ppm, which indicates the environment of the hydrogens, while the y-axis (not explicitly shown) indicates the intensity.

- **δ 7 - 8 ppm:** Two doublets (d, 1H each), which likely correspond to hydrogens on the benzene ring (possibly A and B).
- **δ 3 - 4 ppm:** 
  - A singlet (s, 3H), potentially corresponding to a methoxy group (O-CH₃).
  - Another singlet (s, 2H), possibly indicating hydrogens in a different environment.
  - Quartet (q, 2H), typically indicative of ethyl group CH₂ hydrogens adjacent to a CH₃ group.
- **δ 2 ppm:** A singlet (s, 3H), possibly another methyl group.
- **δ 1 ppm:** Two signals:
  - A singlet (s, 9H), which may represent three equivalent methyl groups.
  - A triplet (t, 3H), often seen in CH₃ groups adjacent to a CH₂ group.

The spectrum provides an overall view of the hydrogen environments and suggests the structure and symmetry present in "molecule 1."
Transcribed Image Text:### NMR Spectroscopy of Molecule 1 #### Chemical Structure The image shows the chemical structure of an organic compound labeled as "molecule 1." The structure includes the following groups and atoms: - A benzene ring with hydrogens labeled A and B. - Two methoxy groups (O-CH₃), labeled E and F. - A carbonyl group adjacent to the benzene ring. - Several methyl groups branching from the main structure. #### NMR Spectrum The spectrum is a typical ¹H NMR (nuclear magnetic resonance) spectrum, providing insights into the different types of hydrogen environments present in the molecule. The x-axis represents the chemical shift in ppm, which indicates the environment of the hydrogens, while the y-axis (not explicitly shown) indicates the intensity. - **δ 7 - 8 ppm:** Two doublets (d, 1H each), which likely correspond to hydrogens on the benzene ring (possibly A and B). - **δ 3 - 4 ppm:** - A singlet (s, 3H), potentially corresponding to a methoxy group (O-CH₃). - Another singlet (s, 2H), possibly indicating hydrogens in a different environment. - Quartet (q, 2H), typically indicative of ethyl group CH₂ hydrogens adjacent to a CH₃ group. - **δ 2 ppm:** A singlet (s, 3H), possibly another methyl group. - **δ 1 ppm:** Two signals: - A singlet (s, 9H), which may represent three equivalent methyl groups. - A triplet (t, 3H), often seen in CH₃ groups adjacent to a CH₂ group. The spectrum provides an overall view of the hydrogen environments and suggests the structure and symmetry present in "molecule 1."
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