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Is this spectrum for 2 hydroxy 5 iodobenzamide or 2 hydroxy 3 iodobenzamide?

Is this spectrum for 2 hydroxy 5 iodobenzamide or 2 hydroxy 3 iodobenzamide?

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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Is this spectrum for 2 hydroxy 5 iodobenzamide or 2 hydroxy 3 iodobenzamide?

This image presents a Nuclear Magnetic Resonance (NMR) spectrum of a sample dissolved in deuterated dimethyl sulfoxide (DMSO-d6) using a QE-300 spectrometer. The spectrum displays a series of peaks indicating the presence of various hydrogen environments within the molecule. ### Key Features: 1. **Chemical Shifts (ppm):** The x-axis represents the chemical shift in parts per million (ppm), indicating how shielded or deshielded a hydrogen atom is within the molecular structure. The scale ranges from 0 to 12 ppm, which is typical for ¹H NMR. 2. **Intensity:** The y-axis shows the intensity of the signals, which correlates to the number of hydrogen atoms producing each peak. 3. **Peak Distribution:** - Peaks between 0 and 5 ppm generally represent aliphatic hydrogens. - Peaks between 6 and 8 ppm often correspond to aromatic hydrogens. - Any peaks beyond 8 ppm may indicate deshielded hydrogens, such as those involved in hydrogen bonding or adjacent to electronegative atoms. 4. **Solvent Peaks:** The spectrum may include a solvent peak from DMSO-d6, typically found around 2.5 ppm. This should be noted when analyzing the spectrum. 5. **Integration:** The red lines overlaid on the spectrum represent integration curves, which help quantify the relative number of hydrogens contributing to each peak. ### Interpretation: Analyzing the pattern and position of the peaks allows chemists to deduce the structure of the molecule. Each unique chemical environment for hydrogen atoms results in a distinct peak. By examining the chemical shifts, splitting patterns, and integration, researchers can infer the types of functional groups and overall structure present in the sample. This NMR spectrum serves as a critical tool in organic chemistry for identifying unknown compounds and confirming the purity and structure of synthesized molecules.
Transcribed Image Text:This image presents a Nuclear Magnetic Resonance (NMR) spectrum of a sample dissolved in deuterated dimethyl sulfoxide (DMSO-d6) using a QE-300 spectrometer. The spectrum displays a series of peaks indicating the presence of various hydrogen environments within the molecule. ### Key Features: 1. **Chemical Shifts (ppm):** The x-axis represents the chemical shift in parts per million (ppm), indicating how shielded or deshielded a hydrogen atom is within the molecular structure. The scale ranges from 0 to 12 ppm, which is typical for ¹H NMR. 2. **Intensity:** The y-axis shows the intensity of the signals, which correlates to the number of hydrogen atoms producing each peak. 3. **Peak Distribution:** - Peaks between 0 and 5 ppm generally represent aliphatic hydrogens. - Peaks between 6 and 8 ppm often correspond to aromatic hydrogens. - Any peaks beyond 8 ppm may indicate deshielded hydrogens, such as those involved in hydrogen bonding or adjacent to electronegative atoms. 4. **Solvent Peaks:** The spectrum may include a solvent peak from DMSO-d6, typically found around 2.5 ppm. This should be noted when analyzing the spectrum. 5. **Integration:** The red lines overlaid on the spectrum represent integration curves, which help quantify the relative number of hydrogens contributing to each peak. ### Interpretation: Analyzing the pattern and position of the peaks allows chemists to deduce the structure of the molecule. Each unique chemical environment for hydrogen atoms results in a distinct peak. By examining the chemical shifts, splitting patterns, and integration, researchers can infer the types of functional groups and overall structure present in the sample. This NMR spectrum serves as a critical tool in organic chemistry for identifying unknown compounds and confirming the purity and structure of synthesized molecules.
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