IR spectra and point group symmetry

  • Thread starter Bladibla
  • Start date
  • #1
345
1

Main Question or Discussion Point

Hello

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?

Thanks.
 

Answers and Replies

  • #2
alxm
Science Advisor
1,842
9
I doubt anyone can say offhand. But yeah, probably the C-Cr stretch. Have you compard to the spectrum of pure Cr(CO)6?
 

Related Threads for: IR spectra and point group symmetry

  • Last Post
Replies
2
Views
5K
Replies
2
Views
6K
  • Last Post
Replies
13
Views
25K
  • Last Post
Replies
1
Views
3K
Replies
5
Views
7K
Replies
1
Views
8K
Replies
4
Views
884
Top