This image displays the structure of a chemical compound, specifically a ketone, followed by a set of DEPT NMR (Distortionless Enhancement by Polarization Transfer Nuclear Magnetic Resonance) spectra. The DEPT technique is used to differentiate between CH, CH2, and CH3 carbons. Below the chemical structure, there are three DEPT spectra labeled DEPT-135, DEPT-90, and DEPT-45.1. **Chemical Structure**: - The structure depicted is a ketone with a methoxy group (H₃CO).2. **DEPT-135 Spectrum**: - In the DEPT-135 spectrum, CH and CH3 carbons appear as positive signals, while CH2 carbons appear as negative signals (inverted). The spectrum shows two upright peaks corresponding to CH3 groups and one inverted peak indicating a CH2 group.3. **DEPT-90 Spectrum**: - The DEPT-90 spectrum displays peaks for CH carbons only. No peaks indicate CH2 or CH3 carbons, which is expected as the method is selective for CH groups. This spectrum does not show any signals, indicating the absence of CH groups in the compound.4. **DEPT-45 Spectrum**: - DEPT-45 shows all CHn carbons (CH, CH2, and CH3) as positive signals. This spectrum has multiple peaks, corresponding to CH3 and CH2 groups in the compound.5. **X-axis (ppm)**: - The x-axis labeled as ppm (parts per million) represents the chemical shift values, a standard measure of resonance frequency in NMR spectroscopy. The spectrum ranges approximately from 0 to 200 ppm.These spectra collectively provide insight into the types of hydrogens in the compound, allowing for more accurate structural determination. **CNMR Spectrum Assignment for 4-Methoxy-4-methylpentan-2-one**This activity involves assigning the CNMR spectrum peaks for 4-methoxy-4-methylpentan-2-one using the structure provided. By understanding the chemical shifts, we can identify which carbon atom corresponds to each peak in the spectrum.**Structure:**The compound, 4-methoxy-4-methylpentan-2-one, is shown with its carbon atoms labeled from 1 to 6.**Assignments:**1. **The peak at ~210 ppm** corresponds to carbon [Select]2. **The peak at ~75 ppm** corresponds to carbon [Select]3. **The peak at ~53 ppm** corresponds to carbon [Select]4. **The peak at ~49 ppm** corresponds to carbon [Select]5. **The peak at ~32 ppm** corresponds to carbon [Select]6. **The peak at ~25 ppm** corresponds to carbon [Select]Each carbon atom can be selected from a dropdown menu labeled 1 through 6. The goal is to match these peaks with the correct carbon atoms in the structure based on their chemical environment and expected chemical shifts.

Given that the DEPT and the original 13C NMR spectrum of the molecule…

Use the spectra on page 4 of the activity and the structure below to assign the CNMR spectrum of 4-methoxy-4-methylpentan-2-one. بال 1 1 H3CO 2 3 4 5 6 The peak at -210 ppm corresponds to carbon [Select] Select] The peak at -75 ppm corresponds to carbon The peak at -53 ppm corresponds to carbon The peak at -49 ppm corresponds to carbon The peak at -32 ppm corresponds to carbon The peak at -25 ppm corresponds to carbon 123456 [Select] [Select] Select]

Use the spectra on page 4 of the activity and the structure below to assign the CNMR spectrum of 4-methoxy-4-methylpentan-2-one. بال 1 1 H3CO 2 3 4 5 6 The peak at -210 ppm corresponds to carbon [Select] Select] The peak at -75 ppm corresponds to carbon The peak at -53 ppm corresponds to carbon The peak at -49 ppm corresponds to carbon The peak at -32 ppm corresponds to carbon The peak at -25 ppm corresponds to carbon 123456 [Select] [Select] Select]

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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