(a) Which of the following polymers (i) – (vi) exist in different stereochemical forms? Draw polymer structures of all the stereoregular forms that are possible for each of the polymers. (i) polyethylene (ii) poly(1-butene) (iii) poly(2-methylpropene) (polyisobutylene) (iv) poly(vinyl fluoride) (v) poly(vinylidine fluoride) (vi) poly(1,3-pentadiene) (b) Explain why high molecular weight polypropylene is optically inactive, despite having an asymmetric center at every other carbon atom, while in contrast, poly(propylene oxide) is optically active
(a) Which of the following polymers (i) – (vi) exist in different stereochemical forms? Draw polymer structures of all the stereoregular forms that are possible for each of the polymers. (i) polyethylene (ii) poly(1-butene) (iii) poly(2-methylpropene) (polyisobutylene) (iv) poly(vinyl fluoride) (v) poly(vinylidine fluoride) (vi) poly(1,3-pentadiene) (b) Explain why high molecular weight polypropylene is optically inactive, despite having an asymmetric center at every other carbon atom, while in contrast, poly(propylene oxide) is optically active
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter23: Polymeric Materials And Soft Condensed Matter
Section: Chapter Questions
Problem 24AP
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(a) Which of the following
(i) polyethylene (ii) poly(1-butene) (iii) poly(2-methylpropene) (polyisobutylene) (iv) poly(vinyl fluoride) (v) poly(vinylidine fluoride) (vi) poly(1,3-pentadiene)
(b) Explain why high molecular weight polypropylene is optically inactive, despite having an asymmetric center at every other carbon atom, while in contrast, poly(propylene oxide) is optically active.
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