How much more stable (in kJ/mol), the benzyl radical when compared to a primary radical, is to be stated. The stability of benzyl and allyl radicals is to be compared. Concept introduction: Bond dissociation energy is the energy required in kJ/mol to break a bond into two radical fragments when the molecule is in the gas phase at 25°C. A radical formed with lesser bond dissociation energy will be more stable. To state: How much more stable the benzyl radical when compared to a primary radical. To compare: The stability of benzyl and allyl radicals.

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Answer 1

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Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.

Chapter 16.8, Problem 19P

Interpretation Introduction

Interpretation:

How much more stable (in kJ/mol), the benzyl radical when compared to a primary radical, is to be stated. The stability of benzyl and allyl radicals is to be compared.

Concept introduction:

Bond dissociation energy is the energy required in kJ/mol to break a bond into two radical fragments when the molecule is in the gas phase at 25°C. A radical formed with lesser bond dissociation energy will be more stable.

To state:

How much more stable the benzyl radical when compared to a primary radical.

To compare:

The stability of benzyl and allyl radicals.

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As we will learn, many antioxidants–compounds that prevent unwanted radical oxidation reactions from occurring–are phenols, compounds that contain an OH group bonded directly to a benzene ring.a.) Explain why homolysis of the O–H bond in phenol requiresconsiderably less energy than homolysis of the O–H bond in ethanol(362 kJ/mol vs. 438 kJ/mol).b.) Why is the C–O bond in phenol shorter than the C–O bond in ethanol?

Answer 2

Question

Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.

Chapter 16.8, Problem 19P

Interpretation Introduction

Interpretation:

How much more stable (in kJ/mol), the benzyl radical when compared to a primary radical, is to be stated. The stability of benzyl and allyl radicals is to be compared.

Concept introduction:

Bond dissociation energy is the energy required in kJ/mol to break a bond into two radical fragments when the molecule is in the gas phase at 25°C. A radical formed with lesser bond dissociation energy will be more stable.

To state:

How much more stable the benzyl radical when compared to a primary radical.

To compare:

The stability of benzyl and allyl radicals.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 3

Question

Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.

Chapter 16.8, Problem 19P

Interpretation Introduction

Interpretation:

How much more stable (in kJ/mol), the benzyl radical when compared to a primary radical, is to be stated. The stability of benzyl and allyl radicals is to be compared.

Concept introduction:

Bond dissociation energy is the energy required in kJ/mol to break a bond into two radical fragments when the molecule is in the gas phase at 25°C. A radical formed with lesser bond dissociation energy will be more stable.

To state:

How much more stable the benzyl radical when compared to a primary radical.

To compare:

The stability of benzyl and allyl radicals.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.

Chapter 16.8, Problem 19P

Interpretation Introduction