1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Why does oxygen carry the positive F.C in [CH3OH2]+?

  1. Feb 10, 2017 #1
    1. The problem statement, all variables and given/known data
    Find the lewis structure for [CH3OH2]+

    2. Relevant equations

    3. The attempt at a solution
    I found the lewis structure to have a positive formal charge on the oxygen. I'm not sure why the oxygen would have the + f.c. since it is much more electronegative than fairly neutral carbon. I initially wanted carbon to have an incomplete octet, so it would carry the + charge, but that did not work.
  2. jcsd
  3. Feb 10, 2017 #2
    I just looked up the electronegativity difference (Pauling scale) for Carbon and oxygen=0.9

    So... this would be a polar covalent bond.

    However, basic lewis structure rules say that the most electronegative atom should carry the negative formal charge. Right?
  4. Feb 11, 2017 #3


    User Avatar

    Staff: Mentor

    Start with CH3OH, then look for a lone pair which can hold H+.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted