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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: XIXTRUMP on December 12, 2010, 02:37:16 PM

Title: About IR/Raman spectra and character tables.
Post by: XIXTRUMP on December 12, 2010, 02:37:16 PM
I need a guide for predict active signals in IR/raman spectra using character tables, i don't remember it and I always hate that.

Anyone helps me?

Title: Re: About IR/Raman spectra and character tables.
Post by: TheUnfocusedOne on December 14, 2010, 09:43:31 AM
I know this dosen't help you short term, but you might want to pick up a solid inorganic text with character table explinations in it.  I think Miessler and Tarr do a pretty good job explaining it, though they lack enough examples (in my opinion).

http://mutuslab.cs.uwindsor.ca/macdonald/250-LectureNotes/Fall2002/Bonding-Notes5.pdf (http://mutuslab.cs.uwindsor.ca/macdonald/250-LectureNotes/Fall2002/Bonding-Notes5.pdf)
Title: Re: About IR/Raman spectra and character tables.
Post by: NTUstudent on December 15, 2010, 09:01:45 AM
You just look at the right of charac table.
if there is letters x or y or z, they will be IR active!
Title: Re: About IR/Raman spectra and character tables.
Post by: Fleaker on December 15, 2010, 09:12:24 PM
Just remember what's IR active is not Raman active and vice versa (or so I recall, I'm not physical chemist and I'm too tired to look through my old texts from university).
Title: Re: About IR/Raman spectra and character tables.
Post by: XIXTRUMP on December 19, 2010, 10:44:30 PM
I just remember, thanks, but I still hate it. Tedious and useless work ¬¬

We use "Cotton, Chemical applications of groups theory"  book as guide... Disgusting book. On a test I had to solve bonds orders using proyection operators, huckel's approximation. I always has doubted about how useful for chemistry is that...

Wish me luck, I have the last exam of this on thuesday. s*** happens xd