The product for the given reaction has to be shown and the major product has to be indicated. Concept introduction: Autoxidation involves reaction of a C − H bond, (usually allylic one) with oxygen under radical initiation condition. The product is a hydroperoxide. Mechanism involves a radical chain process in which resonance-delocalized allylic radical intermediates reacts with molecular oxygen to give peroxy radical that continues the radical chain. Major product is more substituted double bond.

Question

34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.). A) Predict whether decreasing the column inner diameters increase or decrease bandwidth. B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or decreasing bandwidth as a function of i.d. and justify your answer. Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles. 35 20 H(um) 큰 20 15 90 0+ 1500 100 75 550 01 02 594 05 μ(cm/sec) 30 15 10

Answer 1

Question

Chapter 8, Problem 8.31P

(a)

Interpretation Introduction

Interpretation:

The product for the given reaction has to be shown and the major product has to be indicated.

Concept introduction:

Autoxidation involves reaction of a C−H bond, (usually allylic one) with oxygen under radical initiation condition. The product is a hydroperoxide.

Mechanism involves a radical chain process in which resonance-delocalized allylic radical intermediates reacts with molecular oxygen to give peroxy radical that continues the radical chain.

Major product is more substituted double bond.

(b)

Interpretation Introduction

Interpretation:

The product for the given reaction has to be shown and the major product has to be indicated.

Concept introduction:

Autoxidation involves reaction of a C−H bond, (usually allylic one) with oxygen under radical initiation condition. The product is a hydroperoxide.

Mechanism involves a radical chain process in which resonance-delocalized allylic radical intermediates reacts with molecular oxygen to give peroxy radical that continues the radical chain.

Major product is more substituted double bond.

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