Problem Set #2
For each of the following monomers, draw structures and identify each of
possible stereochemical forms of repeat units that can be formed during chain
1. Discuss the mechanism by which stereoregular polyolefins are formed in
heterogeneous coordination polymerization. Describe the polymerization
conditions that may be used to produce (a) isotactic and (b) syndiotactic
2. Draw the structures of the monomers and outline the type of ring-opening
polymerization you would use to synthesize the following polymers:
Not thm n tiont n they NC CN n o, In
3. Describe with the aid of chemical reaction schemes: (a) the major
limitation to synthesizing poly(propylene oxide) by anionic polymerization
of propylene oxide with potassium alkoxide; and (b) alternative anionic
polymerization conditions that can be used to overcome this limitation.
4. (a) Describe the key mechanistic steps in the ring-opening metathesis
polymerization (ROMP) of cyclopentene with ruthenium alkylidine
(b) Show the chemical structures of the repeating units and end-groups of
polymers prepared by ROMP of the following monomers:
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