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orgo question

Discussion in 'DAT Discussions' started by baedero1, Jun 2, 2008.

  1. baedero1

    2+ Year Member

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    Please explain the different reaction b/w these two...
    I think these two reaction are E2. Why do they have different product?
    Does the reaction follow the Zaltsev's rule?
     

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  3. IDontUnderstand

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    The reason the top one takes the hydrogen off of the top carbon is because it's such a big base (it's going to go for the least sterically hindered carbon)

    The bottom one is a small base so it can eliminate according to Zaitsev's rule
     
  4. doc3232

    7+ Year Member

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    Yes, so top 1 (the base) is branched which means it won't be able to get in that close to the secondary carbon.
    Remember when the H comes off, the Br won't be there (first step is Br leaves) so the methyl (primary) will be an easy reach. I doubt you need to know that this occurs, but you should understand why it occurs.
    GOOD LUCK
     
  5. baedero1

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    yes, but you explain about E1 rxn
    however, I think these two rxn are E2..
     

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