The two mass spectra below correspond to two isomers of C4H10O: 1-butanol and 2-butanol. Match the spectrum with the appropriate compound. Place the m/z ratio and the structures for the labeled fragments in the table below. 100 - Compound 00- 2 GO - 40 - 1 2-butanol 20- 10 20 30 40 50 60 70 80 90 100 100 – Compound 80 - 60 40 1-butanol 20- 10 15 20 25 30 35 40 45 50 55 60 65 70 75 m/z Fragment 1 Fragment 2 Fragment 3 Fragment 4 59 n/z Fragment 45 56 31 Relative Intensity Pe_ative Intersity

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### Analyzing Mass Spectra of 1-butanol and 2-butanol

The mass spectra below correspond to two structural isomers of C\(_4\)H\(_{10}\)O: 1-butanol and 2-butanol. Your task is to match each spectrum with the appropriate compound and determine the corresponding fragments in the table provided.

#### Top Mass Spectrum Analysis
- **Graph Details**: 
  - The first mass spectrum shows peaks labeled 1 and 2.
  - On the x-axis is the mass-to-charge ratio (m/z), ranging from 10 to 100.
  - On the y-axis is the relative intensity, peaking at 100.

- **Compound Representation**: The structure next to the graph represents 2-butanol. The hydroxyl group (OH) is attached to the second carbon of the butane chain.

#### Bottom Mass Spectrum Analysis
- **Graph Details**:
  - The second mass spectrum shows peaks labeled 3 and 4.
  - The x-axis spans from 10 to 75, and the y-axis indicates relative intensity, also peaking at 100.

- **Compound Representation**: The structure next to this graph represents 1-butanol. The hydroxyl group is attached to the first carbon of the butane chain.

#### Fragment Analysis Table
For the mass-to-charge ratios and their corresponding structures:

| m/z | Fragment  |  
|-----|-----------|
| 59  | Fragment 1|
| 45  | Fragment 2|
| 56  | Fragment 3|
| 31  | Fragment 4|

Each fragment corresponds to a specific part of the isomers that results from the cleavage of chemical bonds during mass spectrometry.

By analyzing the spectral peaks and fragment table, one can determine the identity of the fragments and their relationship to each isomer.
Transcribed Image Text:### Analyzing Mass Spectra of 1-butanol and 2-butanol The mass spectra below correspond to two structural isomers of C\(_4\)H\(_{10}\)O: 1-butanol and 2-butanol. Your task is to match each spectrum with the appropriate compound and determine the corresponding fragments in the table provided. #### Top Mass Spectrum Analysis - **Graph Details**: - The first mass spectrum shows peaks labeled 1 and 2. - On the x-axis is the mass-to-charge ratio (m/z), ranging from 10 to 100. - On the y-axis is the relative intensity, peaking at 100. - **Compound Representation**: The structure next to the graph represents 2-butanol. The hydroxyl group (OH) is attached to the second carbon of the butane chain. #### Bottom Mass Spectrum Analysis - **Graph Details**: - The second mass spectrum shows peaks labeled 3 and 4. - The x-axis spans from 10 to 75, and the y-axis indicates relative intensity, also peaking at 100. - **Compound Representation**: The structure next to this graph represents 1-butanol. The hydroxyl group is attached to the first carbon of the butane chain. #### Fragment Analysis Table For the mass-to-charge ratios and their corresponding structures: | m/z | Fragment | |-----|-----------| | 59 | Fragment 1| | 45 | Fragment 2| | 56 | Fragment 3| | 31 | Fragment 4| Each fragment corresponds to a specific part of the isomers that results from the cleavage of chemical bonds during mass spectrometry. By analyzing the spectral peaks and fragment table, one can determine the identity of the fragments and their relationship to each isomer.
# Identifying Structural Isomers through Mass Spectrometry

## Introduction

The three compounds shown below are structural isomers of each other. The goal is to match each compound with its corresponding mass spectrum and draw the fragment ion corresponding to the base peak in each spectrum.

### Structural Isomers

1. **Compound a:** A molecule with an alcohol group and a carbon-carbon double bond.
2. **Compound b:** A ketone with a three-carbon backbone and an aldehyde group.
3. **Compound c:** A ketone with a four-carbon chain.

## Mass Spectra Analysis

### Spectrum 1
- **Graph Description:**
  - The x-axis represents the mass-to-charge ratio (m/z).
  - The y-axis shows the relative intensity of the ion fragments.
  - Several peaks are present, with a prominent base peak indicating the most stable ion.
- **Compound Match:** This spectrum corresponds to Compound b, based on the presence of a specific fragment ion.

### Spectrum 2
- **Graph Description:**
  - Multiple peaks are again visible.
  - A distinct base peak stands out, representing the ion with the highest intensity in this spectrum.
- **Compound Match:** This spectrum is associated with Compound a, due to the ion fragments observed.

### Spectrum 3
- **Graph Description:**
  - Contains peaks of varying intensity.
  - The base peak signifies the most prominent ion fragment, reflecting stability or abundance.
- **Compound Match:** This spectrum corresponds to Compound c, based on matching fragment patterns.

## Fragment Ions

### Drawing Fragment Ions for Base Peaks

1. **For Compound a:** The fragment ion represents its alcohol functionality and double bond.
2. **For Compound b:** The fragment ion shows the carbonyl and aldehyde structure.
3. **For Compound c:** The fragment demonstrates the longer carbon chain with a ketone.

Understanding mass spectra and their related fragment ions helps us distinguish between structural isomers, even when the differences are subtle in terms of basic molecular formulas.
Transcribed Image Text:# Identifying Structural Isomers through Mass Spectrometry ## Introduction The three compounds shown below are structural isomers of each other. The goal is to match each compound with its corresponding mass spectrum and draw the fragment ion corresponding to the base peak in each spectrum. ### Structural Isomers 1. **Compound a:** A molecule with an alcohol group and a carbon-carbon double bond. 2. **Compound b:** A ketone with a three-carbon backbone and an aldehyde group. 3. **Compound c:** A ketone with a four-carbon chain. ## Mass Spectra Analysis ### Spectrum 1 - **Graph Description:** - The x-axis represents the mass-to-charge ratio (m/z). - The y-axis shows the relative intensity of the ion fragments. - Several peaks are present, with a prominent base peak indicating the most stable ion. - **Compound Match:** This spectrum corresponds to Compound b, based on the presence of a specific fragment ion. ### Spectrum 2 - **Graph Description:** - Multiple peaks are again visible. - A distinct base peak stands out, representing the ion with the highest intensity in this spectrum. - **Compound Match:** This spectrum is associated with Compound a, due to the ion fragments observed. ### Spectrum 3 - **Graph Description:** - Contains peaks of varying intensity. - The base peak signifies the most prominent ion fragment, reflecting stability or abundance. - **Compound Match:** This spectrum corresponds to Compound c, based on matching fragment patterns. ## Fragment Ions ### Drawing Fragment Ions for Base Peaks 1. **For Compound a:** The fragment ion represents its alcohol functionality and double bond. 2. **For Compound b:** The fragment ion shows the carbonyl and aldehyde structure. 3. **For Compound c:** The fragment demonstrates the longer carbon chain with a ketone. Understanding mass spectra and their related fragment ions helps us distinguish between structural isomers, even when the differences are subtle in terms of basic molecular formulas.
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