The structures of cis - and trans -polyacetylene are to be drawn. Concept introduction: The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers ( cis and trans ).

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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 26, Problem 26.29SP

(a)

Interpretation Introduction

Interpretation:

The structures of cis- and trans-polyacetylene are to be drawn.

Concept introduction:

The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers (cis and trans).

(b)

Interpretation Introduction

Interpretation:

An explanation to show that cis- and trans-polyacetylene conduct electricity is to be stated.

Concept introduction:

The double bonds in the structures of cis- and trans-polyacetylene are present at alternative positions. These alternative positions of double bonds indicate that cis- and trans-polyacetylene are conjugated and thereby movement of electrons are possible.

(c)

Interpretation Introduction

Interpretation:

An explanation for the possibility to prepare anisotropic electrical conductivity (unusual behaviour) polyacetylene films is to be stated.

Concept introduction:

Anisotropic electrical conductivity of a polymer refers to the different conductivity of a polymer in different direction. Electrical conductivity, parallel to the layer of a polymer is high as compare to perpendicular to the layer of a polymer.

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The 2000 Nobel Prize in Chemistry was awarded for work on polyacetylenes. Acetylene can be polymerized using a Ziegler–Natta catalyst. The cis or trans stereochemistry of the products can be controlled by careful selection and preparation of the catalyst. The resulting polyacetylene is an electrical semiconductor with a metallic appearance. cis-Polyacetylene has a copper color, and trans-polyacetylene is silver. Draw the structures of cis- and trans-polyacetylene.

The 2000 Nobel Prize in Chemistry was awarded for work on polyacetylenes. Acetylene can be polymerized using a Ziegler–Natta catalyst. The cis or trans stereochemistry of the products can be controlled by careful selection and preparation of the catalyst. The resulting polyacetylene is an electrical semiconductor with a metallic appearance. cis-Polyacetylene has a copper color, and trans-polyacetylene is silver. Use your structures to show why these polymers conduct electricity.

The 2000 Nobel Prize in Chemistry was awarded for work on polyacetylenes. Acetylene can be polymerized using a Ziegler–Natta catalyst. The cis or trans stereochemistry of the products can be controlled by careful selection and preparation of the catalyst. The resulting polyacetylene is an electrical semiconductor with a metallic appearance. cis-Polyacetylene has a copper color, and trans-polyacetylene is silver. It is possible to prepare polyacetylene films whose electrical conductivity is anisotropic. That is, the conductivity is higher in some directions than in others. Explain how this unusual behavior is possible.

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 26, Problem 26.29SP

(a)

Interpretation Introduction

Interpretation:

The structures of cis- and trans-polyacetylene are to be drawn.

Concept introduction:

The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers (cis and trans).

(b)

Interpretation Introduction

Interpretation:

An explanation to show that cis- and trans-polyacetylene conduct electricity is to be stated.

Concept introduction:

The double bonds in the structures of cis- and trans-polyacetylene are present at alternative positions. These alternative positions of double bonds indicate that cis- and trans-polyacetylene are conjugated and thereby movement of electrons are possible.

(c)

Interpretation Introduction

Interpretation:

An explanation for the possibility to prepare anisotropic electrical conductivity (unusual behaviour) polyacetylene films is to be stated.

Concept introduction:

Anisotropic electrical conductivity of a polymer refers to the different conductivity of a polymer in different direction. Electrical conductivity, parallel to the layer of a polymer is high as compare to perpendicular to the layer of a polymer.

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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 26, Problem 26.29SP

(a)

Interpretation Introduction

Interpretation:

The structures of cis- and trans-polyacetylene are to be drawn.

Concept introduction:

The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers (cis and trans).

(b)

Interpretation Introduction

Interpretation:

An explanation to show that cis- and trans-polyacetylene conduct electricity is to be stated.

Concept introduction:

The double bonds in the structures of cis- and trans-polyacetylene are present at alternative positions. These alternative positions of double bonds indicate that cis- and trans-polyacetylene are conjugated and thereby movement of electrons are possible.

(c)

Interpretation Introduction

Interpretation:

An explanation for the possibility to prepare anisotropic electrical conductivity (unusual behaviour) polyacetylene films is to be stated.

Concept introduction:

Anisotropic electrical conductivity of a polymer refers to the different conductivity of a polymer in different direction. Electrical conductivity, parallel to the layer of a polymer is high as compare to perpendicular to the layer of a polymer.

Expert Solution & Answer

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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 26, Problem 26.29SP

(a)

Interpretation Introduction

Interpretation:

The structures of cis- and trans-polyacetylene are to be drawn.

Concept introduction:

The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers (cis and trans).

(b)

Interpretation Introduction

Interpretation:

An explanation to show that cis- and trans-polyacetylene conduct electricity is to be stated.

Concept introduction:

The double bonds in the structures of cis- and trans-polyacetylene are present at alternative positions. These alternative positions of double bonds indicate that cis- and trans-polyacetylene are conjugated and thereby movement of electrons are possible.

(c)

Interpretation Introduction

Interpretation:

An explanation for the possibility to prepare anisotropic electrical conductivity (unusual behaviour) polyacetylene films is to be stated.

Concept introduction:

Anisotropic electrical conductivity of a polymer refers to the different conductivity of a polymer in different direction. Electrical conductivity, parallel to the layer of a polymer is high as compare to perpendicular to the layer of a polymer.

Expert Solution & Answer

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Answer 5

Chapter 26, Problem 26.29SP

(a)

Interpretation Introduction

Interpretation:

The structures of cis- and trans-polyacetylene are to be drawn.

Concept introduction:

The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers (cis and trans).

(b)

Interpretation Introduction

Interpretation:

An explanation to show that cis- and trans-polyacetylene conduct electricity is to be stated.

Concept introduction:

The double bonds in the structures of cis- and trans-polyacetylene are present at alternative positions. These alternative positions of double bonds indicate that cis- and trans-polyacetylene are conjugated and thereby movement of electrons are possible.

(c)

Interpretation Introduction

Interpretation:

An explanation for the possibility to prepare anisotropic electrical conductivity (unusual behaviour) polyacetylene films is to be stated.

Concept introduction:

Anisotropic electrical conductivity of a polymer refers to the different conductivity of a polymer in different direction. Electrical conductivity, parallel to the layer of a polymer is high as compare to perpendicular to the layer of a polymer.

Answer 6

Chapter 26, Problem 26.29SP

(a)

Interpretation Introduction

Interpretation:

The structures of cis- and trans-polyacetylene are to be drawn.

Concept introduction:

The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers (cis and trans).

Answer 7

Chapter 26, Problem 26.29SP

(a)

Interpretation Introduction

Interpretation:

The structures of cis- and trans-polyacetylene are to be drawn.

Concept introduction:

The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers (cis and trans).

Answer 8

(b)

Interpretation Introduction

Interpretation:

An explanation to show that cis- and trans-polyacetylene conduct electricity is to be stated.

Concept introduction:

The double bonds in the structures of cis- and trans-polyacetylene are present at alternative positions. These alternative positions of double bonds indicate that cis- and trans-polyacetylene are conjugated and thereby movement of electrons are possible.

Answer 9

(b)

Interpretation Introduction

Interpretation:

An explanation to show that cis- and trans-polyacetylene conduct electricity is to be stated.

Concept introduction:

The double bonds in the structures of cis- and trans-polyacetylene are present at alternative positions. These alternative positions of double bonds indicate that cis- and trans-polyacetylene are conjugated and thereby movement of electrons are possible.

Answer 10

(c)

Interpretation Introduction

Interpretation:

An explanation for the possibility to prepare anisotropic electrical conductivity (unusual behaviour) polyacetylene films is to be stated.

Concept introduction:

Anisotropic electrical conductivity of a polymer refers to the different conductivity of a polymer in different direction. Electrical conductivity, parallel to the layer of a polymer is high as compare to perpendicular to the layer of a polymer.

Answer 11

(c)

Interpretation Introduction

Interpretation:

An explanation for the possibility to prepare anisotropic electrical conductivity (unusual behaviour) polyacetylene films is to be stated.

Concept introduction:

Anisotropic electrical conductivity of a polymer refers to the different conductivity of a polymer in different direction. Electrical conductivity, parallel to the layer of a polymer is high as compare to perpendicular to the layer of a polymer.

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 26.2A - Show the intermediate that would result if the...Ch. 26.2A - Prob. 26.2P Ch. 26.2A - Prob. 26.3P Ch. 26.2B - Prob. 26.4P Ch. 26.2B - Prob. 26.5P Ch. 26.2B - Chain branching occurs in cationic polymerization...Ch. 26.2C - Prob. 26.7P Ch. 26.2C - Prob. 26.8P Ch. 26.2C - Chain branching is not as common with anionic...Ch. 26.3 - Prob. 26.10P

The structures of cis - and trans -polyacetylene are to be drawn. Concept introduction: The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers ( cis and trans ).

Interpretation: The structures of cis- and trans-polyacetylene are to be drawn. Concept introduction: The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers (cis and trans).

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Chapter 26 Solutions

Interpretation:

The structures of cis- and trans-polyacetylene are to be drawn.

Concept introduction:

The polymers are made from the polymerisation of monomer units. Polyacetylene is made from polymerization of ethyne molecule. Polyacetylene exist in two geometrical isomers (cis and trans).