The number of transition states present in acid catalyzed reaction of alkene should be determined. Concept introduction: Acid Catalyzed Hydration Reaction: The reaction involves breaking of phi bonds between carbon-carbon multiple bonds and addition of alcohol to more substituted position of carbon in the molecule. First step is the acid donates proton to the alkene which leads to the formation of more stable carbo cation. Then, the water is added to the given alkene through acid catalyzed reaction where the water gets added to the carbo cation finally, the removal of one proton from oxonium ion (oxygen with one positive charge) using water results in the formation of product. Rate determining step: In a chemical reaction the rate determining step is the slowest step in which the rate of the reaction depends on the rate of that slowest step. Activation energy: It is defined as the minimum energy required by the reacting species in order to undergo chemical reaction. Intermediate species: It is the species formed during the middle of the chemical reaction between the reactant and the desired product. Transition State: The state which defines the highest potential energy with respect to reaction co-ordinate between reactant and product. It is usually denoted by using the symbol ‘≠’. Rate constant: The rate constant for a chemical reaction is the proportionality term in the chemical reaction rate law which gives the relationship between the rate and the concentration of the reactant present in the chemical reaction.

Question

1. Predict the organic product(s) of the following reactions. Assume excess of reagents unless otherwise noted. a) &l BH3 •THF b) 1) NaOH 2) H3O+ solve d) ala 1) EtMgBr 2) H3O+ e) H2N سكر CuLi NH2 1) SOCI2 2) EtMgBr 3) H3O+ NC H3O+ Δ

Answer 1

Question

Chapter 6.5, Problem 10P

(a)

Interpretation Introduction

Interpretation:

The number of transition states present in acid catalyzed reaction of alkene should be determined.

Concept introduction:

Acid Catalyzed Hydration Reaction: The reaction involves breaking of phi bonds between carbon-carbon multiple bonds and addition of alcohol to more substituted position of carbon in the molecule.

First step is the acid donates proton to the alkene which leads to the formation of more stable carbo cation.

Then, the water is added to the given alkene through acid catalyzed reaction where the water gets added to the carbo cation finally, the removal of one proton from oxonium ion (oxygen with one positive charge) using water results in the formation of product.

Rate determining step: In a chemical reaction the rate determining step is the slowest step in which the rate of the reaction depends on the rate of that slowest step.

Activation energy: It is defined as the minimum energy required by the reacting species in order to undergo chemical reaction.

Intermediate species: It is the species formed during the middle of the chemical reaction between the reactant and the desired product.

Transition State: The state which defines the highest potential energy with respect to reaction co-ordinate between reactant and product. It is usually denoted by using the symbol ‘≠’.

Rate constant: The rate constant for a chemical reaction is the proportionality term in the chemical reaction rate law which gives the relationship between the rate and the concentration of the reactant present in the chemical reaction.

(b)

Interpretation Introduction

Interpretation:

The number of intermediate present in the given reaction should be determined.

Concept introduction:

Rate determining step: In a chemical reaction the rate determining step is the slowest step in which the rate of the reaction depends on the rate of that slowest step.

Activation energy: It is defined as the minimum energy required by the reacting species in order to undergo chemical reaction.

Acid Catalyzed Hydration Reaction: The reaction involves breaking of phi bonds between carbon-carbon multiple bonds and addition of alcohol to more substituted position of carbon in the molecule.

First step is the acid donates proton to the alkene which leads to the formation of more stable carbo cation.

Then, the water is added to the given alkene through acid catalyzed reaction where the water gets added to the carbo cation finally, the removal of one proton from oxonium ion (oxygen with one positive charge) using water results in the formation of product.

Intermediate species: It is the species formed during the middle of the chemical reaction between the reactant and the desired product.

Transition State: The state which defines the highest potential energy with respect to reaction co-ordinate between reactant and product. It is usually denoted by using the symbol ‘≠’.

(c)

Interpretation Introduction

Interpretation:

The step with smallest rate constant should be determined.

Concept introduction:

Rate determining step: In a chemical reaction the rate determining step is the slowest step in which the rate of the reaction depends on the rate of that slowest step.

Activation energy: It is defined as the minimum energy required by the reacting species in order to undergo chemical reaction.

Acid Catalyzed Hydration Reaction: The reaction involves breaking of phi bonds between carbon-carbon multiple bonds and addition of alcohol to more substituted position of carbon in the molecule.

First step is the acid donates proton to the alkene which leads to the formation of more stable carbo cation.

Then, the water is added to the given alkene through acid catalyzed reaction where the water gets added to the carbo cation finally, the removal of one proton from oxonium ion (oxygen with one positive charge) using water results in the formation of product.

Intermediate species: It is the species formed during the middle of the chemical reaction between the reactant and the desired product.

Transition State: The state which defines the highest potential energy with respect to reaction co-ordinate between reactant and product. It is usually denoted by using the symbol ‘≠’.

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