6. The spectra labeled "A" and "B" are for two of the four compounds shown below. In the boxes provided, put the labels "A" and "B" below the compound to which the spectrum matches. You will have two boxes with no label in them. A OH M LOH DOGO B 5000 EN mmmmm 1500 1000

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### Infrared Spectroscopy Analysis for Compound Identification

#### Question 6: Spectral Matching Exercise

The task involves matching the correct infrared (IR) spectra labeled "A" and "B" to the respective chemical compounds from a set of four options. Follow the instructions below to complete this exercise.

**Instructions**: 
Compare the provided IR spectra with the types of bonds and functional groups present in each compound and determine which spectra ("A" and "B") correspond to which compounds. Place the label "A" or "B" in the boxes below the correct compounds. Note that two compounds will not receive a label.

#### Provided Compounds:
1. **Compound 1**: Contains a benzene ring with a carboxylic acid group.
2. **Compound 2**: Contains a benzene ring with an alcohol group.
3. **Compound 3**: Contains a benzene ring.
4. **Compound 4**: Contains a benzene ring with a nitrile group.

#### Spectra Explanation:

- **Spectrum A**: 
  - This spectrum presents significant peaks in the range typically associated with carboxylic acids (around 1700 cm^-1 for C=O stretch and a broad O-H stretch).

- **Spectrum B**:
  - This spectrum shows distinctive peaks in the typical regions for alcohols (around 3300 cm^-1 for O-H stretch).

### Graphical Representation:
Two IR spectra, labeled "A" and "B", are displayed at the bottom of the diagram:
- **Spectrum A**:
  - Broad absorption past 3000 cm^-1 corresponding to O-H stretching in carboxylic acids.
  - Significant peak around 1700 cm^-1 indicative of the C=O stretch.
- **Spectrum B**:
  - Broad peak near 3300 cm^-1 suggestive of O-H stretch, characteristic of alcohols.

**Steps to Identify Compounds**:
1. **Identify functional groups in spectra**:
   - Look for broad peaks around 3000 cm^-1 (O-H stretching).
   - Sharp peaks around 1700 cm^-1 (C=O stretching).
2. **Match these features with the given compounds**.

**Matching**:

1. **Spectrum A** is most likely related to **Compound 1** (carboxylic acid) due to the presence of the broad O-H and sharp C=O stretches.
2.
Transcribed Image Text:### Infrared Spectroscopy Analysis for Compound Identification #### Question 6: Spectral Matching Exercise The task involves matching the correct infrared (IR) spectra labeled "A" and "B" to the respective chemical compounds from a set of four options. Follow the instructions below to complete this exercise. **Instructions**: Compare the provided IR spectra with the types of bonds and functional groups present in each compound and determine which spectra ("A" and "B") correspond to which compounds. Place the label "A" or "B" in the boxes below the correct compounds. Note that two compounds will not receive a label. #### Provided Compounds: 1. **Compound 1**: Contains a benzene ring with a carboxylic acid group. 2. **Compound 2**: Contains a benzene ring with an alcohol group. 3. **Compound 3**: Contains a benzene ring. 4. **Compound 4**: Contains a benzene ring with a nitrile group. #### Spectra Explanation: - **Spectrum A**: - This spectrum presents significant peaks in the range typically associated with carboxylic acids (around 1700 cm^-1 for C=O stretch and a broad O-H stretch). - **Spectrum B**: - This spectrum shows distinctive peaks in the typical regions for alcohols (around 3300 cm^-1 for O-H stretch). ### Graphical Representation: Two IR spectra, labeled "A" and "B", are displayed at the bottom of the diagram: - **Spectrum A**: - Broad absorption past 3000 cm^-1 corresponding to O-H stretching in carboxylic acids. - Significant peak around 1700 cm^-1 indicative of the C=O stretch. - **Spectrum B**: - Broad peak near 3300 cm^-1 suggestive of O-H stretch, characteristic of alcohols. **Steps to Identify Compounds**: 1. **Identify functional groups in spectra**: - Look for broad peaks around 3000 cm^-1 (O-H stretching). - Sharp peaks around 1700 cm^-1 (C=O stretching). 2. **Match these features with the given compounds**. **Matching**: 1. **Spectrum A** is most likely related to **Compound 1** (carboxylic acid) due to the presence of the broad O-H and sharp C=O stretches. 2.
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