(a) Interpretation: The reaction of free radical R · with ferulic acid is to be sttaed. The resonance structure of the product radical is to be drawn. Concept introduction: The free radical is a molecule having unpaired electron in its molecular orbital. Due to the presence of unpaired electron the molecule become unstable and reactive. It can react with any another molecule to generate free radical.

Question

How many signals do you expect in the H NMR spectrum for this molecule? Br Br Write the answer below. Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H atoms that would contribute to the same signal as the H already highlighted red. Note for advanced students: In this question, any multiplet is counted as one signal. Number of signals in the 'H NMR spectrum. For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to the same signal as the H atom already highlighted red. If no other H atoms will contribute, check the box at right. No additional Hs to color in top molecule For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute to the same signal as the H atom already highlighted red. If no other H atoms will contribute, check the box at right. No additional Hs to color in bottom molecule

Answer 1

Question

Chapter 18, Problem 18.63AP

Interpretation Introduction

(a)

Interpretation:

The reaction of free radical R· with ferulic acid is to be sttaed. The resonance structure of the product radical is to be drawn.

Concept introduction:

The free radical is a molecule having unpaired electron in its molecular orbital. Due to the presence of unpaired electron the molecule become unstable and reactive. It can react with any another molecule to generate free radical.

Interpretation Introduction

(b)

Interpretation:

The comparison as a free-radical inhibitor of the isomer of ferulic acid, 3−hydroxy−4−methoxycinnamic acid with ferulic acid is to be stated.

Concept introduction:

The free radical is a molecule having unpaired electron in its molecular orbital. Due to the presence of unpaired electrons the molecule become unstable and reactive. The free radical inhibitor are the substances which inhibit the reaction.

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