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Chemistry Forums for Students => Organic Chemistry Forum => Organic Spectroscopy => Topic started by: jdpaul88 on December 09, 2012, 08:37:09 PM

Title: Having a terrible time identifying this IR spectrum
Post by: jdpaul88 on December 09, 2012, 08:37:09 PM
I know it is a carboxylic acid with a phenyl. The ar-oh should be an aromatic-OR.

http://i.imgur.com/0JzKf.jpg
Title: Re: Having a terrible time identifying this IR spectrum
Post by: orgopete on December 10, 2012, 01:33:42 AM
It is very very difficult to identify a compound only from an IR spectrum. If the compound is known, then some spectrometers can attempt to match it with a spectral database. More information is needed unless someone happens to recognize this spectrum.
Title: Re: Having a terrible time identifying this IR spectrum
Post by: jdpaul88 on December 10, 2012, 01:45:32 AM
Well it is a carboxylic acid (solid)
Title: Re: Having a terrible time identifying this IR spectrum
Post by: jdpaul88 on December 10, 2012, 02:36:46 AM
Do you think it could be 4-hydroxybenzoic acid?
Title: Re: Having a terrible time identifying this IR spectrum
Post by: curiouscat on December 15, 2012, 01:16:40 AM
Quote from: jdpaul88 on December 10, 2012, 02:36:46 AM
Do you think it could be 4-hydroxybenzoic acid?

(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F0JzKf.jpg&hash=c6b8189a29fecac7c0db0b77f7eb88d0998d05ac)

(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fwebbook.nist.gov%2Fcgi%2Fcbook.cgi%3FScan%3Dcob2237%26amp%3BType%3DIR&hash=95f00dd8a4079e0ed48744e4b271433943c084ca)

Yet, why not this:

(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fwebbook.nist.gov%2Fcgi%2Fcbook.cgi%3FScan%3Dcob5673%26amp%3BType%3DIR&hash=6b2589847fa4b84336313f5d1f5f8f22c52f83de)
Title: Re: Having a terrible time identifying this IR spectrum
Post by: curiouscat on December 15, 2012, 01:23:02 AM
Quote from: jdpaul88 on December 10, 2012, 01:45:32 AM
Well it is a carboxylic acid (solid)

Do you know a MW? Or elemental % composition?