EBK ESSENTIAL ORGANIC CHEMISTRY
EBK ESSENTIAL ORGANIC CHEMISTRY
3rd Edition
ISBN: 8220100659461
Author: Bruice
Publisher: PEARSON
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Chapter 15.10, Problem 21P

(a)

Interpretation Introduction

Interpretation:

The structure of a short segment of PHB has to be drawn.

Concept Introduction:

Biodegradable polymers:

  • Polymers which can be ruined by microorganisms such as fungi, algae or bacteria.
  • Polyactide(PLA) is an example for biodegradable polymer.
  • Polyhydroxyalkanoates(PHAs)- step growth polymers of 3-hydroxycarboxylicacids.
  • An important PHA is PHB which is an example of a polymer of 3-hydroxybutyricacid

(b)

Interpretation Introduction

Interpretation:

The structure of a short segment of PHBV with alternating monomers has to be drawn.

Concept Introduction:

Biodegradable polymers:

  • Polymers which can be ruined by microorganisms such as fungi, algae or bacteria.
  • Polyactide(PLA) is an example for biodegradable polymer.
  • Polyhydroxyalkanoates(PHAs)- step growth polymers of 3-hydroxycarboxylicacids.
  • An important PHA is PHB which is an example of a polymer of 3-hydroxybutyricacid

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a. What is the eluent used in the column chromatography here (a “silica plug filtration” is essentially a very short column)? b. The spectroscopy of compound 5b is described in the second half of this excerpt, including 1H-NMR and 13C-NMR (which you will learn about in CHEM 2412L), MS (which you will learn about later in CHEM 2411L) and IR. One of the IR signals is at 3530 cm-1. What functional group does this indicate might be present in compound 5b?
Steps and explanations. Also provide, if possible, ways to adress this kind of problems in general.
a. The first three lines of this procedure describe the reaction used to make compound 5b. In the fourth line, hexane and sodium bicarbonate are added. What organic lab technique is being used here?  b. What is the purpose of the Na2SO4?  c. What equipment would you use to “concentrate [a solution] under reduced pressure”?
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CBSE Class 12 Chemistry || Polymers || Full Chapter || By Shiksha House; Author: Best for NEET;https://www.youtube.com/watch?v=OxdJlS0xZ0Y;License: Standard YouTube License, CC-BY