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Chapter 21: Q21-23P (page 718)

Draw structures of the step-growth polymers you would expect to obtain from the following reactions:

Short Answer

Expert verified

a.

b.

c.

Step by step solution

01

Polymer formed in (a)

Formation of Polyether takes place by the removal of halogen from one reactant and halogen from another reactant.

Formation of polyether

02

Polyester is formed in (b)

By the addition of acid removal of water takes place, by removal of –OH from alcohol and hydrogen from carboxylic acid and then polymerisation takes place. Then it leads to the formation of polyester.

Formation of polyester

03

 Step 3: Polyamide is formed in (c)

In the formation of amide takes place by the removal of hydrogen from amine and removal of chlorine from another reactant. After this polymerisation takes place.

Formation of polyamide

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Most popular questions from this chapter

Epoxy adhesives are prepared in two steps. SN2 reaction of the disodium salt of bisphenol A with epichlorohydrin forms a “Pre-polymer,” which is then “Cured” by treatment with a triamine such as H2NCH2CH2NHCH2CH2NH2.

Draw structures to show how the addition of the triamine results in a strengthening of the polymer.

21-69 We said in Section 21-6 that mechanistic studies on ester hydrolysishave been carried out using ethyl propanoate labeled with in theether-like oxygen. AssumethatO18− labeled acetic acid is your onlysource of isotopic oxygen, and then propose a synthesis of the labeledethyl propanoate.

21-43 The following reaction, called the benzilic acid rearrangement, takes place by typical carbonyl group reactions. Propose a mechanism (Ph=phenyl).

Outline methods for the preparation of acetophone(Phenyl methyl ketone) starting from the following:

a)Benzene b) Bromobenzene c) Methyl benzoate

d) Benzonitrile e) Styrene

Given IUPAC names for the following substances:
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