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- (a) Which monomer is most likely to undergo anionic polymerization? Justify your choice. ( b)Which one ismost likely to undergo cationic polymerization? Justify your choice.Although chain branching in radical polymerizations can occur by intermolecular H abstraction as shown in Mechanism 30.2, chain branching can also occur by intramolecular H abstraction to form branched polyethylene that contains butyl groups as branches.a. Draw a stepwise mechanism that illustrates which H must be intramolecularly abstracted to form butyl substituents.b. Suggest a reason why the abstraction of this H is more facile than the abstraction of other H’s.Although chain branching in radical polymerizations can occur by intermolecular H abstraction as shown in Mechanism 28.2, chain branching can also occur by intramolecular H abstraction to form branched polyethylene that contains butyl groups as branches.a. Draw a stepwise mechanism that illustrates which H must be intramolecularly abstracted to form butyl substituents. b. Suggest a reason why the abstraction of this H is more facile than the abstraction of other H's.
- Propylene forms only oligomer under normal free radical conditions, yet the monomer forms high-molecular-weight polymer if it is polymerized while trapped in the channels of a crystalline host substance such as urea or thiourea. Explain [G. Di Silvestro, P. Sozzani, and M. Farina, Polym. Preprints, 27(1), 92, 1986].Rank the following monomers in order of increasing reactivity toward anionic polymerization (least reactive to most reactive).Rank the following monomers in order of increasing reactivity toward cationic polymerization (least reactive to most reactive).
- Draw the starting structure that would lead to this polymer underradical conditions. Please explain and show your work. For indicated reaction provide: Ionic polymerization of propene. a. general equationb. Mechanismc. Discussion of regioselectivityd. Discussion of the proportion between the products formed (if more than one is formed).e. Discussion of stereoselectivity.Draw mechanism (with electron pairs, flow of electrons, charges, and steps, where applicable) of radical polymerization of styrene initiated by nitrile type initiator (RN=NR) that consists of initiation (two steps), propagation, and two termination steps (when two chains undergo combination and disproportionation reactions) Im stuck on how to show the mechanism for the two termination steps
- When certain cycloalkenes are used in metathesis reactions, ringopening metathesis polymerization (ROMP) occurs to form a highmolecular- weight polymer, as shown with cyclopentene as the starting material. The reaction is driven to completion by relief of strain in the cycloalkene.What products are formed by ring-opening metathesis polymerization of each alkene?a) Please draw the retrosynthesis of this polymer below.b) Draw the structure of another polymer that can react with this polymer to generate soft material.c) Draw the structure of a cross-linker could be used for the reaction in question b). .(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.