[Beatlesfan]

Ok so I'm in a Inorganic Chemistry class and we have an assignment to identify all the vibrations in the molecule and which are IR and Raman active. I actually think I can handle that part but I can't even freaking figure out which molecule I'm dealing with! I've taken 4 years of chemistry and I've never seen this notation before!!! WTF please help

[Dan]

It looks like it is a generic molecule IY₃. There are two lone pairs and I guess they are indicating that the bond angles are 90° (e.g. ICl₃) - I do not know what the "05" is (or possibly 06/CS/C6/OS etc I cant decipher the handwriting 100%).

[Beatlesfan]

Thank you for your input. I still need help with this one though. Remember this is for group theory, the atoms themselves don't matter, we just need to figure out the symmetry of the molecule

[Dan]

You should show an attempt at this, that is a forum rule.

You need to determine the point group of the molecule, e.g.:

http://symmetry.otterbein.edu/common/images/flowchart.pdf

and then carry out a vibrational analysis using character tables from your textbook. There will be a chapter on vibrational analysis in most inorganic textbooks. Expecting all of it to be reproduced here is unreasonable.

[Beatlesfan]

Uhh well I have no problem getting the vibrations and point groups I don't need help with that... I am not breaking any rules. I just need to know what molecule it is. I appreciate your answer however it did not seem convincing

[Beatlesfan]

Dan - Thanks for your answer. The more I look at it the more I realize you are right with ICl3. I can now begin working on the problem. I realize it made it seem like I was asking for more help I was just not convinced yet that you were right on the identification of the molecule.