Organic Chemistry
Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Chapter 31.SE, Problem 33AP
Interpretation Introduction

Interpretation:

Draw the structure of pre-polymer and show the cross-linking effect of addition of pre-polymer to triamine.

Concept introduction:

The type of polymerization occurring here is condensation polymerization. In this type of polymerization, two monomers react together to give rise to polymeric product by the release of small molecule. In this reaction the molecule which is released during this reaction is sodium chloride (NaCl).

Interpretation Introduction

Interpretation:

Draw the structure of pre-polymer and show the cross-linking effect of addition of pre-polymer to triamine.

Concept introduction:

The type of polymerization occurring here is condensation polymerization. In this type of polymerization, two monomers react together to give rise to polymeric product by the release of small molecule. In this reaction the molecule which is released during this reaction is sodium chloride (NaCl).

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Ph3P-CHCH3 H₂C H3C Aldehydes and ketones are converted into alkenes by means of a direct nucleophilic addition called the Wittig reaction. In the reaction, a triphenylphosphorine ylide, also called a phosphorane, adds to an aldehyde/ketone to give a four-membered cyclic intermediate called an oxaphosphetane. The oxaphosphetane is not isolated but instead spontaneously decomposes to release triphenylphosphine oxide and an alkene. CH3 00 + The ylide is formed by reaction of triphenylphosphine, a good nucleophile, with a primary alkyl halide in an SN2 reaction, followed by deprotonation of the carbon with a strong base, such as butyllithium. The carbonyl carbon and the carbon originally bonded to the halogen become the two carbons with the double bond in the product alkene X m CH3 The real value of the Wittig reaction lies in its ability to yield an alkene of predictable structure, as the C=C bond is precisely where the C=O bond was in the reactant and no isomers (other than E/Z isomers)…
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