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: Help With Spectroscopy

  1. Mar 16, 2012 #1
    Indicate those of the following statements that are correct for the compound 13CH3OH
    (The 13 in front of C is supposed to indicate carbon-13)

    a. The carbon-13 spectrum will be a 1:2:1 triplet.
    b. The proton NMR spectrum will be a 1:1 doublet and a broad singlet.
    c. The broad singlet in the proton spectrum is due to the exchange of protons among methanol molecules.
    d. Because of the oxygen, the IR spectrum will have a strong band around 1750 cm-1.
    e. This compound will absorb in the visible region, and will therefore be coloured.
    f. The mass spectrum should have a peak at mass 15.

    Can someone explain to me which statement(s) are correct?

    Last edited: Mar 16, 2012
  2. jcsd
  3. Mar 16, 2012 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    What do you know about 13-C NMR spectroscopy? Heteronuclear decoupling?
    Tell us what you know about 1-H NMR.
    What about IR spectroscopy? Do alcohols have a strong absorption at 1750 cm-1?
    Any visible chromophores in methanol?
    What fragment might have mass = 15? Is it a likely fragment for methanol?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook