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Carbonyl Compound A: C3H60 |4Q QE-300 2 CDC13 160 200 220 240 N 3 5 CO CO S 2 2

Carbonyl Compound A: C3H60 |4Q QE-300 2 CDC13 160 200 220 240 N 3 5 CO CO S 2 2

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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From the h nmr and c nmr of the unknown carbonyl compound determine its structure and draw it, label each c, ch, ch2, or ch3 group using letters (a,b,c) and assign each peak in the proton and carbon nmr spectrum to the carbons and hydrogens that correspond to it in the molecule.

Example of what should be included in the table:

hydrogen/carbon carbon chemical shift hydrogen chemical shift splitting pattern integral couples to 
           
           
           
The image shows an NMR spectrum of a carbonyl compound with the molecular formula C₃H₆O, displayed on a grid with the following components: **Graph Components:** - **Horizontal Axis (X-Axis):** - This axis represents the chemical shift in ppm (parts per million). The scale ranges from 12 to 0 ppm, which is typical for NMR spectral analysis. - Notable peaks are observed near the 2 ppm mark and between 4-5 ppm, indicating the presence of specific hydrogen environments. - **Vertical Axis (Y-Axis):** - The units on this axis are typically arbitrary, representing the intensity of the NMR signal. - **Top Annotation:** - "CDCl₃" is annotated at the top, indicating the solvent used was deuterated chloroform. - "QE-300" refers to the instrument used, likely operating at 300 MHz. - **Right Label:** - The text "Carbonyl Compound A: C₃H₆O" specifies the sample analyzed in this spectrum. **Spectrum Details:** - **Broad and Sharp Peaks:** - The spectrum features broad peaks, such as the notable signal around 2 ppm, which is characteristic of methyl protons adjacent to a carbonyl group. - Smaller, sharper peaks near 4-5 ppm suggest the presence of other proton environments, possibly from methylene or methine groups. - **Integration:** - Often, NMR spectrums include integrated signals which provide information about the number of protons contributing to each peak. This NMR spectrum is used to analyze the structural components and confirm the identity of carbonyl compounds by comparing the observed chemical shifts to known reference values for different proton environments in similar molecules.
Transcribed Image Text:The image shows an NMR spectrum of a carbonyl compound with the molecular formula C₃H₆O, displayed on a grid with the following components: **Graph Components:** - **Horizontal Axis (X-Axis):** - This axis represents the chemical shift in ppm (parts per million). The scale ranges from 12 to 0 ppm, which is typical for NMR spectral analysis. - Notable peaks are observed near the 2 ppm mark and between 4-5 ppm, indicating the presence of specific hydrogen environments. - **Vertical Axis (Y-Axis):** - The units on this axis are typically arbitrary, representing the intensity of the NMR signal. - **Top Annotation:** - "CDCl₃" is annotated at the top, indicating the solvent used was deuterated chloroform. - "QE-300" refers to the instrument used, likely operating at 300 MHz. - **Right Label:** - The text "Carbonyl Compound A: C₃H₆O" specifies the sample analyzed in this spectrum. **Spectrum Details:** - **Broad and Sharp Peaks:** - The spectrum features broad peaks, such as the notable signal around 2 ppm, which is characteristic of methyl protons adjacent to a carbonyl group. - Smaller, sharper peaks near 4-5 ppm suggest the presence of other proton environments, possibly from methylene or methine groups. - **Integration:** - Often, NMR spectrums include integrated signals which provide information about the number of protons contributing to each peak. This NMR spectrum is used to analyze the structural components and confirm the identity of carbonyl compounds by comparing the observed chemical shifts to known reference values for different proton environments in similar molecules.
**Infrared (IR) Spectrum of 2-Methyl-2-pentanol** This graph represents the infrared spectrum of 2-methyl-2-pentanol. The x-axis denotes the wavelength in terms of wavenumbers (cm⁻¹), ranging from 4000 to 400 cm⁻¹, while the y-axis displays the percent transmittance, varying from 70% to 100%. ### Key Peaks: 1. **3366.99 cm⁻¹**: - A broad peak associated with O-H stretching, indicative of alcohol presence. 2. **2932.53 cm⁻¹ and 2873.28 cm⁻¹**: - Represent C-H stretching vibrations commonly found in alkanes. 3. **1461.31 cm⁻¹, 1376.58 cm⁻¹, and 1260.35 cm⁻¹**: - These peaks can be attributed to bending vibrations of C-H bonds and possible C-O stretching in alcohols. 4. **1091.73 cm⁻¹, 987.21 cm⁻¹, 912.06 cm⁻¹, 856.56 cm⁻¹, 800.99 cm⁻¹, and 742.59 cm⁻¹**: - These peaks correspond to various bending modes and possibly out-of-plane bends associated with the molecular structure of 2-methyl-2-pentanol. This spectrum serves as a tool for identifying functional groups within the molecule by examining the characteristic peaks and their intensities.
Transcribed Image Text:**Infrared (IR) Spectrum of 2-Methyl-2-pentanol** This graph represents the infrared spectrum of 2-methyl-2-pentanol. The x-axis denotes the wavelength in terms of wavenumbers (cm⁻¹), ranging from 4000 to 400 cm⁻¹, while the y-axis displays the percent transmittance, varying from 70% to 100%. ### Key Peaks: 1. **3366.99 cm⁻¹**: - A broad peak associated with O-H stretching, indicative of alcohol presence. 2. **2932.53 cm⁻¹ and 2873.28 cm⁻¹**: - Represent C-H stretching vibrations commonly found in alkanes. 3. **1461.31 cm⁻¹, 1376.58 cm⁻¹, and 1260.35 cm⁻¹**: - These peaks can be attributed to bending vibrations of C-H bonds and possible C-O stretching in alcohols. 4. **1091.73 cm⁻¹, 987.21 cm⁻¹, 912.06 cm⁻¹, 856.56 cm⁻¹, 800.99 cm⁻¹, and 742.59 cm⁻¹**: - These peaks correspond to various bending modes and possibly out-of-plane bends associated with the molecular structure of 2-methyl-2-pentanol. This spectrum serves as a tool for identifying functional groups within the molecule by examining the characteristic peaks and their intensities.
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The question is based on the concept of organic spectroscopy.  We need to analyse the spectral data and identify the compound.

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You didn't assign the h chemical shift, splitting pattern, and integral for hydrogen b? 

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