Which proton(s) in the final product (1-Phenylethanol) corresponds to the double

Question

Which proton(s) in the final product (1-Phenylethanol) corresponds to the doublet at approximately 1.5 ppm in the 1H NMR?

a. Methyl protons

b. Methine proton

c. Hydroxyl proton

d. Aromatic protons

Why was it necessary to extract the reaction mixture with sodium hydroxide?

To remove excess sulfuric acid

To remove excess styrene

To remove excess water

To deprotonate the final product.

To remove excess sulfuric acid

To remove excess styrene

To remove excess water

To deprotonate the final product.

Explanation / Answer

1. Answer is a. Methyl protons.

Protons in the final product (1-Phenylethanol) corresponds to the doublet at approximately 1.5 ppm in the 1H NMR is Methyl protons.

2. Answer is a. To remove excess sulfuric acid.

In order to remove an acidic compound from a mixture, a base like NaOH or NaHCO3 is used. Here acidic compound is sulfuric acid.

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