The monomer from the following step-growth condensation polymer is to be identified. Concept introduction: Polymers are the macromolecules that are formed by the repeating monomeric units. Step-growth condensation polymers are synthesized by the stepwise reaction of monomers. The monomers contain bifunctional or multifunctional groups. In step-growth polymerization , small molecules such as water, ammonia are eliminated. The condensation reaction of the dicarboxylic acid and diamine are employed for the synthesis of polyamide. The general reaction for the synthesis of two repeating units of the polymer is, Here, R is an alkyl group.

Question

CH3 CH H3C CH3 H OH H3C- -OCH2CH3 H3C H -OCH3 For each of the above compounds, do the following: 1. List the wave numbers of all the IR bands in the 1350-4000 cm-1 region. For each one, state what bond or group it represents. 2. Label equivalent sets of protons with lower-case letters. Then, for each 1H NMR signal, give the 8 value, the type of splitting (singlet, doublet etc.), and the number protons it represents. of letter δ value splitting # of protons 3. Redraw the compound and label equivalent sets of carbons with lower-case letters. Then for each set of carbons give the 5 value and # of carbons it represents. letter δ value # of carbons

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Question

Chapter 21, Problem 93E

Interpretation Introduction

Interpretation:

The monomer from the following step-growth condensation polymer is to be identified.

Concept introduction:

Polymers are the macromolecules that are formed by the repeating monomeric units. Step-growth condensation polymers are synthesized by the stepwise reaction of monomers. The monomers contain bifunctional or multifunctional groups. In step-growth polymerization, small molecules such as water, ammonia are eliminated.

The condensation reaction of the dicarboxylic acid and diamine are employed for the synthesis of polyamide. The general reaction for the synthesis of two repeating units of the polymer is,

Here, R is an alkyl group.

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