-Understand the reaction mechanisms for the synthesis of polystyrene (how does radical formationstart, and how does the polymer chain become elongated?) as well as the mechanism for nylonformation (how does the reaction between the diacid chloride and the diamine produce a polymerchain?).

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Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter29: Organic Polymer Chemistry

Section: Chapter Questions

Problem 29.28P

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Similar questions

(a) Explain why poly(vinyl alcohol) cannot be prepared by the radical polymerization of vinyl alcohol (CH2=CHOH). (b) Devise a stepwise synthesis of poly(vinyl alcohol) from vinyl acetate (CH2=CHOCOCH3). (c) How can poly(vinyl alcohol) be converted to poly(vinyl butyral), a polymer used in windshield safety glass?
(b) Draw and describe the mechanism of radical-catalysed polymerization of ethene to poly(ethene) (also known as polythene), including details of initiation, propagation, and termination steps. Include a representative initiator, and how it brings about initiation.
(d) show termination and propogation process in polyethylene terephthalate (PET).
(a) Show how poly(propylene oxide) can be synthesized via anionic ring-opening polymerization. (b) Draw the mechanism for the initiation and first two propagation steps.
How are cyclopropanes synthesized from alkenes using carbene reactants and how is the mechanism understood to predict the products. Also, what are the various methods for generating carbenes (including the preparation of Simmons-Smith reagents)
Q.2: Explain how to prepare polymeric gasoline from acetaldehyde. (
Rank the following monomers in order of increasing reactivity toward anionic polymerization (least reactive to most reactive).
In electrophilic aromatic substitution reaction by drawing the structures of the compounds given below Expla in which products will be formed as a result of its reaction with the nitronium ion. a)methoxybenzene, b)benzoic acid
6) +1 eq. HBr (add slowly to organic) 7) Br heat + CH;CO,H (solvent acetic acid)
ences] Use the References to access important values if needed for this question. Draw the organic product that is expected to form when the following compound is oxidized under biological conditions. oxidation CH,CH,SH reduction • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • If no reaction occurs, draw the organic starting material. C. opy aate Pre ChemDoodle"
1.- How does the molecular weight change vs % conversion in a step polymerization? Explain this behavior and why does it occur? 2.- Name at least 3 requirements for obtaining a high molecular weight polymer by step polymerization. 3.- How can you minimize cyclization reactions in a step polymerization? Explain with equations and narrative Why do you want to minimize cyclization? Is it possible to eliminate cyclic products completely?
Substitutions on aromatic rings are generally carried out by electrophilic substitution, but for the synthesis of phenolic compounds and alkoxy benzene it is carried out by nucleophilic substitution, explain why this is so .

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-Understand the reaction mechanisms for the synthesis of polystyrene (how does radical formation start, and how does the polymer chain become elongated?) as well as the mechanism for nylon formation (how does the reaction between the diacid chloride and the diamine produce a polymer chain?).