Question

Construct a simulated 1H NMR spectrum, including proton integrations, for CH3CHCl2. Drag the appropriate splitting patterns to the approximate chemical shift positions; place the integration values in the small bins above the associated chemical shift. Splitting patterns and integrations may be used more than once, or not at all, as needed. Likewise, some bins might remain blank. Note that peak heights are arbitrary and do not indicate proton integrations.

Answer 1

Concepts and reason

¹H NMR Spectroscopy:

• Nuclear magnetic resonance spectroscopy is one of the techniques in analytical chemistry that is widely used to determine the purity of a sample and also to predict the structure of the organic compounds.

• spectroscopy is phenominal that it observes when the frequency of the nuclei of atoms (sample) resonate with the frequency of the rotating magnetic field.

• Spectroscopy determines the different types of hydrogen atoms (chemically non-equivalent hydrogen atoms) present in a molecule.

Fundamentals

¹H NMR Spin-Spin Coupling Patterns:

Number of neighboring hydrogen atoms (chemically non-equivalent) n	Number of peaks ()	Splitting Name	Peak heights ratio
0	1	Singlet
1	2	Doublet
2	3	Triplet
3	4	Quartet

This technique is used to compare the obtained product to the expected product in a reaction mixture.

The given organic compound is 1,1-dichloroethane. The structure of this compound is shown below.

In this structure, there are two non-equivalent protons present.

For methyl proton, the number of adjacent hydrogen atoms is 1. Therefore, this proton will show a doublet (around 2ppm) in the ¹H NMR spectrum.

For a chlorine-substituted proton, the number of adjacent hydrogen atoms is 3. Therefore, this proton will show a quartet (around 5.5ppm) in the ¹H NMR spectrum.

Therefore, the ¹H NMR spectrum for the given compound is shown below.

Ans:

The ¹H NMR spectrum for the given compound is shown below.