Given that 1,3-cyclopentadiene polymerizes slowly at room temperature to yield a polymer that has double bonds only at the ends. On heating, the polymer breaks down to regenerate 1,3-cyclopentadiene. A structure for the product is to be proposed. Concept introduction: Conjugated dienes polymerise through the 1,4 addition of one diene molecule to another diene molecule. To propose: A structure for the polymer obtained by the slow polymerization of 1,3-cyclopentadiene at room temperature and that breaks on heating to give back 1,3-cyclopentadiene is to be given.

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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 14.SE, Problem 44AP

Interpretation Introduction

Interpretation:

Given that 1,3-cyclopentadiene polymerizes slowly at room temperature to yield a polymer that has double bonds only at the ends. On heating, the polymer breaks down to regenerate 1,3-cyclopentadiene. A structure for the product is to be proposed.

Concept introduction:

Conjugated dienes polymerise through the 1,4 addition of one diene molecule to another diene molecule.

To propose:

A structure for the polymer obtained by the slow polymerization of 1,3-cyclopentadiene at room temperature and that breaks on heating to give back 1,3-cyclopentadiene is to be given.

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(a 4 shows scanning electron microscope (SEM) images of extruded actions of packing bed for two capillary columns of different diameters, al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the same stationary phase, spherical particles with 1-um diameter. A) When the columns were prepared, the figure shows that the column with the larger diameter has more packing irregularities. Explain this observation. B) Predict what affect this should have on band broadening and discuss your prediction using the van Deemter terms. C) Does this figure support your explanations in application question 33? Explain why or why not and make any changes in your answers in light of this figure. Figure 4 SEM images of sections of packed columns for a) 750 and b) 30-um-i.d. capillary columns.³

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34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.). A) Predict whether decreasing the column inner diameters increase or decrease bandwidth. B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or decreasing bandwidth as a function of i.d. and justify your answer. Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles. 35 20 H(um) 큰 20 15 90 0+ 1500 100 75 550 01 02 594 05 μ(cm/sec) 30 15 10

Answer 2

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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 14.SE, Problem 44AP

Interpretation Introduction

Interpretation:

Given that 1,3-cyclopentadiene polymerizes slowly at room temperature to yield a polymer that has double bonds only at the ends. On heating, the polymer breaks down to regenerate 1,3-cyclopentadiene. A structure for the product is to be proposed.

Concept introduction:

Conjugated dienes polymerise through the 1,4 addition of one diene molecule to another diene molecule.

To propose:

A structure for the polymer obtained by the slow polymerization of 1,3-cyclopentadiene at room temperature and that breaks on heating to give back 1,3-cyclopentadiene is to be given.

Expert Solution & Answer

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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 14.SE, Problem 44AP

Interpretation Introduction

Interpretation:

Given that 1,3-cyclopentadiene polymerizes slowly at room temperature to yield a polymer that has double bonds only at the ends. On heating, the polymer breaks down to regenerate 1,3-cyclopentadiene. A structure for the product is to be proposed.

Concept introduction:

Conjugated dienes polymerise through the 1,4 addition of one diene molecule to another diene molecule.

To propose:

A structure for the polymer obtained by the slow polymerization of 1,3-cyclopentadiene at room temperature and that breaks on heating to give back 1,3-cyclopentadiene is to be given.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

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 14.SE, Problem 44AP

Interpretation Introduction