**DEPT (Distortionless Enhancement by Polarization Transfer) NMR**DEPT is a \(^13C\)-NMR technique that provides information about the number of hydrogens attached to a carbon in a \(^13C\)-NMR spectrum. Through a series of pulses, primary (CH\(_3\)), secondary (CH\(_2\)), and tertiary (CH) carbons can be assigned in the \(^13C\)-NMR spectrum. Quaternary (C\(^4\)) carbons do not appear in a DEPT spectrum. In a DEPT spectrum, you will see four spectra (from top to bottom): DEPT-135, DEPT-90, DEPT-45, and the original \(^13C\) spectrum. **Note:** Our NMR does NOT print the original \(^13C\) spectrum at the bottom.- **DEPT-135:** Tertiary (CH) and primary (CH\(_3\)) groups are positive, secondary (CH\(_2\)) groups are negative. - **DEPT-90:** Only tertiary (CH) groups show up.- **DEPT-45:** All protonated carbons show up.### Spectrum Details:- **DEPT-135:** Shows positive peaks for primary and tertiary carbons, and negative peaks for secondary carbons. - **DEPT-90:** Shows a peak only for tertiary carbons.- **DEPT-45:** Shows peaks for all protonated carbons.- **\(^13C\) Spectrum:** Shows peaks labeled a to f, corresponding to different carbon atoms in the compound. ### Molecular Structure:- Labels a to f refer to specific carbon atoms in the compound structure provided above the spectra.### Important Notes:- In 2,2,5,5-trimethylhexan-3-one, there is one tertiary carbon (b), one secondary carbon (d), two different types of primary carbons (a, f).- Carbon b is negative in the DEPT-135 spectrum. - Carbon b is the only tertiary carbon, so it is the only peak in the DEPT-90 spectrum.- Carbon c and carbon e have no hydrogens attached, so these peaks are missing in all DEPT spectra. **Match the DEPT Component Spectrum with the Information Gleaned**1. **DEPT-135 (top spectrum)** - [ Choose ] - 2° groups only - 1° groups, 2° groups, and 3° groups - 2° groups and 3° groups are positive, 1° groups are negative - 1° and 3° groups are positive, 2° groups are negative - 3° groups only2. **DEPT-90 (middle spectrum)** - [ Choose ] - 2° groups only - 1° groups, 2° groups, and 3° groups - 2° groups and 3° groups are positive, 1° groups are negative - 1° and 3° groups are positive, 2° groups are negative - 3° groups only3. **DEPT-45 (bottom spectrum)** - [ Choose ] - 2° groups only - 1° groups, 2° groups, and 3° groups - 2° groups and 3° groups are positive, 1° groups are negative - 1° and 3° groups are positive, 2° groups are negative - 3° groups only**Explanation:** This task involves matching the given DEPT spectra with the correct interpretation of group signals based on the DEPT NMR technique. Each option corresponds to the presence or orientation (positive or negative) of 1°, 2°, and 3° groups within each spectrum.

We know that DEPT provides the information about the number of hydrogen atoms attached to the carbon…

Match the DEPT component spectrum with the information gleaned. DEPT-135 (top spectrum) DEPT-90 (middle spectrum) DEPT-45 (bottom spectrum) [Choose ] [Choose ] 2° groups only 1° groups, 2° groups, and 3° groups 2° groups and 3° groups are positive, 1° groups are negative 1° and 3° groups are positive, 2° groups are negative. 3° groups only [Choose ]

Match the DEPT component spectrum with the information gleaned. DEPT-135 (top spectrum) DEPT-90 (middle spectrum) DEPT-45 (bottom spectrum) [Choose ] [Choose ] 2° groups only 1° groups, 2° groups, and 3° groups 2° groups and 3° groups are positive, 1° groups are negative 1° and 3° groups are positive, 2° groups are negative. 3° groups only [Choose ]

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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