The structural unit of natural rubber, isoprene can polymerize in cis-1,4 addition. Most of us know the mechanism of simple addition reaction, which is 1,2 addition but we do not know about1,4 addition. Here in this post we will discuss about both 1,2 and 1,4 addition.
Addition To Alkenes
Take an alkene 1-butene, and add HBr.
Here is the mechanism
This is 1,2 addition.
What happens when we try the same reaction on butadiene?
You get two products!
This is the same product we saw in the previous (butene) example.
Here is the mechanism
Hope this helps you.
For more detailed explanation, visit the following website
https://www.masterorganicchemistry.com/2017/03/22/reactions-of-dienes-12-and-14-addition/
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