How do I determine an unknown compound in organic chemistry using IR Spectra?
Hi, I was given an unknown compound in lab and given the IR spectra of the unknown solution. From looking at the spectra, I know it is an alcohol. I also performed the boiling point test and found it to be around 112-114 C with a range of +-6 to be 106-120 C.
From looking at the spectra, is there a way to identify the unknown compound?
The following name of compound could be:
2-methyl-1-propanol
2,2-dimethyl-1-propanol
3-methyl-2-butanol
3-pentanol
1-butanol
2-pentanol
3,3-dimethyl-2-butanol
2,3-dimethyl-2-butanol
Here is the link of the IR spectra:
<img src="http://img.photobucket.com/albums/v338/qtle23/IMG-... ">
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Compare your spectra with the standards online and see which one matches up most. http://www.aist.go.jp/RIODB/SDBS/cgi-bin/cre_index...
Also compare your boiling point with the standards on chemfinder.com
Good luck!
IR is used to determine functional groups. There is the obvious broad -OH band also a -CH3 band at 2960, 1380 a -CH2- band at 2850, 1470 and a primary O-H band at 1050. The reason there are 2 bands for each functional group is because on is from the bond bending and the other is from it stretching. I would compare this to the IR's of the other molecules since you didnt get the Mass spec or NMR data.
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