The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism. Concept Introduction: Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium. Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

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Answer 1

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Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

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Dd.68.

Melmac, a thermosetting polymer formed from melamine and formaldehyde (CH2=O), is used to make dishes and countertops. Draw a stepwise mechanism for the condensation of one mole of formaldehyde with two moles of melamine, which begins the synthesis of Melmac.

What will be the most suitable initiator used to polymerize the followingmonomers? Give ONE (1) reason for your choice.

Answer 2

Question

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

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Answer 3

Question

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

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Answer 4

Question

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

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Answer 5

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

Answer 6

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

Answer 7

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

Answer 8

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

Answer 9

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 15.2 - Prob. 1P Ch. 15.2 - Prob. 2P Ch. 15.2 - Prob. 3P Ch. 15.2 - Prob. 4P Ch. 15.2 - List the following groups of monomers in order...Ch. 15.2 - List the following groups of monomers in order...Ch. 15.2 - Prob. 7P Ch. 15.2 - Why does methyl methacrylate not undergo cationic...Ch. 15.2 - Which monomer and which type of initiator would...Ch. 15.2 - Prob. 10P

Solution Summary: The author explains that the polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

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