The mechanism for branching in free radical polymerisation of styrene is to be shown and the type of aliphatic hydrogen which is most likely to be abstracted is to be explained. Concept Introduction: Free radical polymerisation is the polymerisation in which polymer forms through free radical mechanism in which electrons are equally distributed between both atoms involved in bonding. Styrene polymerises via free radical polymerisation in the presence of benzoyl peroxide. To determine: The mechanism of the given reaction; also the type of hydrogen which is most likely to be abstracted in the given reaction.

Question

2. A graph shown below shows first ionization energies for elements from H to Ne. First ionization energy/kJ mol 2500 2000 1500 1000 500 T T T T 1 2 3 5 6 7 8 9 10 Atomic number a) Using arguments of electronic structure, explain why ionization energy of Li is much lower than that of H. (2 points) then dips at O. b) Using the same arguments, explain why ionization energy increases from B to N, and (3 points)

Answer 1

Question

Definition Definition Monomer units that are not only combined in the linear chain but are also attached through branches of different lengths along the main chain. Branched-chain polymers have a lower density, lower melting point, and lower tensile strength compared to linear chain polymers because branched-chain does not pack well. Examples of branched-chain polymers are amylopectin and glycogen.

Chapter 26.2A, Problem 26.3P

Interpretation Introduction

Interpretation: The mechanism for branching in free radical polymerisation of styrene is to be shown and the type of aliphatic hydrogen which is most likely to be abstracted is to be explained.

Concept Introduction: Free radical polymerisation is the polymerisation in which polymer forms through free radical mechanism in which electrons are equally distributed between both atoms involved in bonding. Styrene polymerises via free radical polymerisation in the presence of benzoyl peroxide.

To determine: The mechanism of the given reaction; also the type of hydrogen which is most likely to be abstracted in the given reaction.

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2. A graph shown below shows first ionization energies for elements from H to Ne. First ionization energy/kJ mol 2500 2000 1500 1000 500 T T T T 1 2 3 5 6 7 8 9 10 Atomic number a) Using arguments of electronic structure, explain why ionization energy of Li is much lower than that of H. (2 points) then dips at O. b) Using the same arguments, explain why ionization energy increases from B to N, and (3 points)

Give the name of this compound, including stereochemistry if relevant: CICH2 CH3 Br CH₂CH=CH2 Write in the product, including stereochemistry where relevant, for these reactions. See end of ch. 8, p. 301-303. 1. 03 a) 2-methyl-2-pentene -> 2. Zn, H* Br2 b) 1-ethylcyclopentene -->

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Answer 2

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Definition Definition Monomer units that are not only combined in the linear chain but are also attached through branches of different lengths along the main chain. Branched-chain polymers have a lower density, lower melting point, and lower tensile strength compared to linear chain polymers because branched-chain does not pack well. Examples of branched-chain polymers are amylopectin and glycogen.

Chapter 26.2A, Problem 26.3P

Interpretation Introduction

Interpretation: The mechanism for branching in free radical polymerisation of styrene is to be shown and the type of aliphatic hydrogen which is most likely to be abstracted is to be explained.

Concept Introduction: Free radical polymerisation is the polymerisation in which polymer forms through free radical mechanism in which electrons are equally distributed between both atoms involved in bonding. Styrene polymerises via free radical polymerisation in the presence of benzoyl peroxide.

To determine: The mechanism of the given reaction; also the type of hydrogen which is most likely to be abstracted in the given reaction.

Expert Solution & Answer

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See solution

Check out sample textbook solution

Answer 3

Question

Definition Definition Monomer units that are not only combined in the linear chain but are also attached through branches of different lengths along the main chain. Branched-chain polymers have a lower density, lower melting point, and lower tensile strength compared to linear chain polymers because branched-chain does not pack well. Examples of branched-chain polymers are amylopectin and glycogen.

Chapter 26.2A, Problem 26.3P

Interpretation Introduction

Interpretation: The mechanism for branching in free radical polymerisation of styrene is to be shown and the type of aliphatic hydrogen which is most likely to be abstracted is to be explained.

Concept Introduction: Free radical polymerisation is the polymerisation in which polymer forms through free radical mechanism in which electrons are equally distributed between both atoms involved in bonding. Styrene polymerises via free radical polymerisation in the presence of benzoyl peroxide.

To determine: The mechanism of the given reaction; also the type of hydrogen which is most likely to be abstracted in the given reaction.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 4

Question

Definition Definition Monomer units that are not only combined in the linear chain but are also attached through branches of different lengths along the main chain. Branched-chain polymers have a lower density, lower melting point, and lower tensile strength compared to linear chain polymers because branched-chain does not pack well. Examples of branched-chain polymers are amylopectin and glycogen.

Chapter 26.2A, Problem 26.3P

Interpretation Introduction