Problem Set 4 soln

Problem Set 4 soln - CHEM 312 Problem Set 4 1. Complete the...

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CHEM 312 Problem Set 4 1. Complete the following polymerization reaction. You only have to show the product, not the step-by-step mechanism: synthetic rubber, used in tires because it's air tight H+ n polystyrene H+ n polyvinyl chloride (PVC) Cl H+ Cl n H+ n H+ n H+ n 2. Fill in the arrows to show the electron flow for how the following first steps in a polymerization reaction: + H + H H 3. Show the monomer that results in the following polymer: n H +
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4. In the addition of H + to isoprene (2-methylbuta-1,3-diene), there are four possible carbocations that can form. Draw all 4. Which one is the most likely to form? Why? H+ H H H H most stable= most likely 5. In the polymerization of isoprene, several products can form, but the most common polymer is shown below. Can you figure out how it forms? n H + H H+ H H H H H and so on and so on. ... The interesting thing is the movement of the double bond while in the carbocation state (these are resonance structures ). The product is the structure of natural rubber (latex),
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This note was uploaded on 10/24/2011 for the course CHEM 312 taught by Professor Bailey during the Spring '03 term at Cal Poly.

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Problem Set 4 soln - CHEM 312 Problem Set 4 1. Complete the...

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