Sketch the following spectra that would be obtained for 2-chloroethanol: e. The four parts of a DEPT 13C NMR spectrum.

Verified step by step guidance

1. Identify the carbon environments in 2-chloroethanol: there are two types of carbon atoms, one bonded to chlorine (CH2Cl) and one bonded to hydroxyl (CH2OH).
2. Understand the DEPT 13C NMR spectrum: DEPT-90 shows only CH signals, DEPT-135 shows CH and CH3 as positive signals and CH2 as negative signals, and DEPT-45 shows all CH, CH2, and CH3 signals.
3. Analyze the DEPT-90 spectrum: since 2-chloroethanol has no CH groups, there should be no signals in the DEPT-90 spectrum.
4. Analyze the DEPT-135 spectrum: expect to see two signals, one positive for CH2OH and one negative for CH2Cl.
5. Analyze the DEPT-45 spectrum: expect to see two signals, one for each CH2 group (CH2OH and CH2Cl).

Key Concepts

DEPT NMR Spectroscopy

DEPT (Distortionless Enhancement by Polarization Transfer) NMR is a technique used to differentiate between carbon types in a molecule. It provides information about the number of hydrogen atoms attached to each carbon atom, allowing for the identification of CH3, CH2, and CH groups. This is crucial for interpreting the spectra of organic compounds like 2-chloroethanol.

Carbon Types in Organic Molecules

In organic chemistry, carbon atoms can be classified based on their bonding to hydrogen atoms: CH3 (methyl), CH2 (methylene), and CH (methine). Each type produces distinct signals in NMR spectra, which helps in determining the structure of the compound. Understanding these classifications is essential for accurately sketching the DEPT NMR spectrum for 2-chloroethanol.

Interpreting NMR Spectra

Interpreting NMR spectra involves analyzing the peaks and their intensities to deduce the molecular structure. In DEPT spectra, the presence or absence of signals for different carbon types indicates how many hydrogen atoms are attached to each carbon. This skill is vital for sketching the correct spectra for compounds like 2-chloroethanol, ensuring accurate representation of its molecular framework.