1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Preparation of alkenes from alcohols

  1. Dec 6, 2009 #1
    Q. Draw the structure for all possible alkenes & the alcohols from which they can be prepared.

    CH3-CH=CH-CH2-CH3 <---- CH3-CHOH-CH2-CH2-CH3

    CH2=CH-CH2-CH2-CH3 <---- CH2OH-CH2-CH2-CH2-CH3

    Both in the presence of H+ & heat.

    I also drew Cyclopentanol from which we can prepare Cyclopentene.

    Are these all the possible pentenes? And are these equations correct?

    Thankyou (:
     
  2. jcsd
  3. Dec 6, 2009 #2

    Lok

    User Avatar

    I suppose they need to have 5 C atoms , as if not the possibilities would be cosmological :P.
     
  4. Dec 7, 2009 #3

    Borek

    User Avatar

    Staff: Mentor

    There is a third pentanol which you have not included.

    There are also branched pentenes - but whether they count may depend on the exact wording of the question.

    Plus zillions of compounds with other number of carbons :wink:

    --
    methods
     
  5. Dec 8, 2009 #4
    Haha Yeaa..I meant pentenes not alkenes :P :$
     
  6. Dec 8, 2009 #5

    chemisttree

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Good so far, but incomplete. For example you can get to CH2=CH-CH2-CH2-CH3 from two precursor alcohols (and you have written them both) and you can get to CH3-CH=CH-CH2-CH3 from two precursor alcohols, one of which you have shown and one is not shown.

    And of course there are the isomers that Borek mentioned as well.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Preparation of alkenes from alcohols
  1. Bromination of alkene (Replies: 2)

Loading...