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

IR spectra and point group symmetry

  1. May 4, 2009 #1

    I'm currently studying the reaction of anisole with hexacarbonylchromium, and experiment shows the displacement of 2 of the carbonyl ligands with the anisole group, forming a 2-η ligand with the chromium ion.

    After refluxing to obtain the crystals, IR and nmr spectra of the sample were obtained; Apprarently, the point group symmetry of the complex affects the IR spectra of the Cr(CO)4(anisole) compound, but I cannot see how it would affect the IR. Currently, In my IR spectra, I have a distinct peak at 1830 cm-1 corresponding the the CO stretch, and a lesser but nevetheless signficant peak at 1930 cm-1, which I can currently hypothesise is due to the backbonding of electrons to the carbonyl ligands.

    Can anyone help with this?

  2. jcsd
  3. May 5, 2009 #2


    User Avatar
    Science Advisor

    I doubt anyone can say offhand. But yeah, probably the C-Cr stretch. Have you compard to the spectrum of pure Cr(CO)6?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: IR spectra and point group symmetry
  1. IR Spectra of anhydrides (Replies: 13)