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Safari File Edit View History Bookmarks Window Help 8 70% E Sat Sep 1 1 2:03:02 AM a edugen.wileyplus.com Netfi ix WileyPLUSs Google Image Result for https://www.ptable.com/images/per Klein, Organic Chemistry, 2e Organic Chemistry I & II (CHEM 128A/B) BACK NEXT ASSIGNMENT RESOURCES What functional groups are shown in the IR spectrum shown below? IR Spectroscopy 2018 Question2 - Quostion6 Obiective O aldehyde O carboxylic acid alcohol ketone nitrile (i.e, RCN) None of these other choices is correct. ester

Explanation / Answer

IR spectroscopy mainly deals with the stretching and bending vibrations that occur in a molecule. The molecules when placed in a IR spectrometer absorbs a particular frequencies while others are transmitted. Also a compound absorbs the frequency in a particular region and shows stretching and bending vibrations.

In the above spectra we see three main peaks:

1. At approximately 3000 cm-1 which represents the stretching frequency of O-H group In alcohol.

2. At approx. 1500 cm-1 which represents the stretching of C-O or O-H in alcohol.

3. At approx. 600 cm-1 which may represent the bending vibrations of the C-H.

Therefore from all the above points we can conclude that the functional group may be alcohol.

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