Draw the structure of isotactic poly(acrylonitrile) and syndiotactic polystyrene.

Short Answer

Expert verified

1)

2)

Step by step solution

01

Structure of isotactic poly(acrylonitrile)

When all the CN groups are on the same side of a chain, this type of structure is called isotactic polt(acrylonitrile) structure.

General form:

Poly (acrylonitrile)

Isotactic:

02

Structure of syndotactic polystyrene

Syndotactic polystyrene contains regular alternate phenyl groups in the carbon chain.

General form:

Syndotactic

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Bisphenol A is made on a large scale by a condensation of phenol with acetone. Suggest an appropriate catalyst, and propose a mechanism for this reaction. (Hint: This is a condensation because three molecules are joined with loss of water. The mechanism belongs to another class of reactions though.)


Cholic acid, a major constituent of bile, has the structure shown.

(a) Draw the structure of cholic acid, showing the rings in their chair conformations, and label each methyl group and hydroxy group as axial or equatorial. (Making a model may be helpful.)

(b) Cholic acid is secreted in bile as an amide linked to the amino group of glycine. This cholic acid-amino acid combination acts as an emulsifying agent to disperse lipids in the intestines for easier digestion. Draw the structure of the cholic acid-glycine combination and explain why it is a good emulsifying agent.

Plywood and particle board are often glued with cheap, waterproof urea-formaldehyde resins. Two to three moles of formaldehyde are mixed with one mole of urea and a little ammonia as a basic catalyst. The reaction is allowed to proceed until the mixture becomes syrupy, and then it is applied to the wood surface. The wood surfaces are held together under heat and pressure, while polymerization continues and cross-linking takes place. Propose a mechanism for the base-catalyzed condensation of urea with formaldehyde to give a linear polymer, and then show how further condensation leads to cross-linking. (Hint: The carbonyl group lends acidity to the N - Hprotons of urea. A first condensation with formaldehyde leads to an imine, which is weakly electrophilic and reacts with another deprotonated urea.)

Zytel®finds extensive use in the automotive and electronics industries. Zytel® has the structure shown.

  1. What functional group is contained in the Zytel® structure?
  2. Is Zytel® a chain-growth polymer or a step-growth polymer?
  3. Draw the products that would be formed if the polymer were completely hydrolyzed under acidic or basic conditions.

Draw the important resonance forms of the stabilized anion formed in the anionic polymerization of methyl acrylate.

See all solutions

Recommended explanations on Chemistry Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free