In what reaction Zaitsev’s rule is used to predict the major product has to be identified from the given options. Concept Introduction: Dehydration reaction is the loss of water from a single reactant. Alcohol undergoes dehydration reaction to form alkene . Sulfuric acid acts as a catalyst for hydration of alkene at room temperature. The same sulfuric acid acts as a dehydrating agent when treated with alcohol at high temperature. If there are more than one product can be formed from the alcohol, the major product is decided by Zaitsev’s rule. This rule states that, the major product formed in an alcohol dehydration is the alkene that has more number of alkyl groups attached to the carbon atoms of the double bond.

Question

(a 4 shows scanning electron microscope (SEM) images of extruded actions of packing bed for two capillary columns of different diameters, al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the same stationary phase, spherical particles with 1-um diameter. A) When the columns were prepared, the figure shows that the column with the larger diameter has more packing irregularities. Explain this observation. B) Predict what affect this should have on band broadening and discuss your prediction using the van Deemter terms. C) Does this figure support your explanations in application question 33? Explain why or why not and make any changes in your answers in light of this figure. Figure 4 SEM images of sections of packed columns for a) 750 and b) 30-um-i.d. capillary columns.³

Answer 1

Question

Chapter 3.9, Problem 6QQ

Interpretation Introduction

Interpretation:

In what reaction Zaitsev’s rule is used to predict the major product has to be identified from the given options.

Concept Introduction:

Dehydration reaction is the loss of water from a single reactant. Alcohol undergoes dehydration reaction to form alkene. Sulfuric acid acts as a catalyst for hydration of alkene at room temperature. The same sulfuric acid acts as a dehydrating agent when treated with alcohol at high temperature.

If there are more than one product can be formed from the alcohol, the major product is decided by Zaitsev’s rule. This rule states that, the major product formed in an alcohol dehydration is the alkene that has more number of alkyl groups attached to the carbon atoms of the double bond.

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