Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Electron delocalization in Benzophenone

  1. Oct 12, 2008 #1
    1. The problem statement, all variables and given/known data
    Are all the atoms except the hydrogens involved in electron delocalization in benzophenone?

    2. Relevant equations

    3. The attempt at a solution

    Yes as the double bonds are in conjugation. But we were told that the answer is no. Can anybody explain why this so?
  2. jcsd
  3. Oct 14, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    Distinguish between the pi and sigma electrons. I am not certain whether the pi bond on the carbonyl group participates with the benzenes , at the moment I am not able to envision it doing so.
  4. Oct 15, 2008 #3
    i would think that because of the stability of the two benzene rings they are very well delocalized, however oxygen from the carbonyl would give a partial negative charge itself and the carbon a partial positive, leaving a dipole moment towards oxygen. All carbons in the benzene ring DO contribute to the delocalization in the conjugated pi bonds, but the oxygen does not because its tendency is to want to take the electrons from carbon. if that makes sense.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook