Polymerization of 2-Chloro-2-Butene: Solution

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The discussion focuses on the polymerization of 2-chloro-2-butene through addition polymerization. Participants analyze the initiation step involving an initiator and the formation of radical species. There is clarification on the structure of the polymer, particularly regarding the end groups, which include specific atoms like chlorine and initiator residues. Questions arise about the correct representation of the polymer's structure and the necessity of showing end groups. The conversation emphasizes understanding the initiation and termination processes in the polymerization of 2-chloro-2-butene.
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Homework Statement


How would the polymer of 2-chloro-2-butene look when formed by addition polymerization


Homework Equations





The Attempt at a Solution


I have attached my solution. Please tell me if i am right/wrong and why if it is wrong.
 

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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?
 
Initiation:

I* + CH2=CCl-CH2-CH3--> I-CH2-CHCl*-CH2-CH3How is that for initiation step? where I is initiator and * is radical sign
 
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)
 
I* + CH3-CCl=CH-CH3--> I-CH2-CCl*-CH2-CH3

And i am not sure what the "end groups" you are referring to are.
 
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?
 
I don't understand where you got the 2nd chlorine atom from
 
You're right. Should be...

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

and...

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