# Polymer Question

1. Apr 20, 2010

### Macroer

1. The problem statement, all variables and given/known data
How would the polymer of 2-chloro-2-butene look when formed by addition polymerization

2. Relevant equations

3. The attempt at a solution
I have attached my solution. Please tell me if i am right/wrong and why if it is wrong.

#### Attached Files:

• ###### polymer.JPG
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2. Apr 21, 2010

### chemisttree

What does the initiator end of the molecule look like? How is the process terminated? What does the other end of the molecule look like?

3. Apr 21, 2010

### Macroer

Initiation:

I* + CH2=CCl-CH2-CH3--> I-CH2-CHCl*-CH2-CH3

How is that for initiation step? where I is initiator and * is radical sign

4. Apr 22, 2010

### chemisttree

You drew 2-chloro-1-butene. How about the 2-butene version? Do you think you will need to show the end groups in your answer? (I honestly don't know)

5. Apr 22, 2010

### Macroer

I* + CH3-CCl=CH-CH3--> I-CH2-CCl*-CH2-CH3

And i am not sure what the "end groups" you are referring to are.

6. Apr 22, 2010

### chemisttree

I* + CH3-CCl=CH-CH3 --> (CH3)(Cl)(I)C-C*(Cl)(CH3) Step 1 (not a polymer yet)

The end groups are (CH3)(Cl)(I)C- in the example above. It will always be at the end of the new polymer, thus 'end group'. What about the other end?

7. Apr 22, 2010

### Macroer

I don't understand where you got the 2nd chlorine atom from

8. Apr 22, 2010

### chemisttree

You're right. Should be....

(CH3)(I)C-C*(Cl)(CH3)

and....

The end groups are (CH3)(I)C- in the example above.

Last edited: Apr 22, 2010