The following infrared spectra belong to (i) a ketone, (ii) an aldehyde, (iii) a
ID: 814740 • Letter: T
Question
The following infrared spectra belong to (i) a ketone, (ii) an aldehyde, (iii) an alcohol, (iv) an ester, and (v) a carboxylic acid. Match spectra A through E with these types of compounds.
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The following infrared spectra belong to (i) a ketone, (ii) an aldehyde, (iii) an alcohol, (iv) an ester, and (v) a carboxylic acid. Match spectra A through E with these types of compounds. (Note that IR spectra such as these are obtained with an instrument that records the spectrum in two parts.)Explanation / Answer
A) aldehyde (it has fermi resonance between 2830-2730 cm-1)
B) carboxilic acid (the really broad signal at 3000 and carboxylate band at 1250 cm-1)
c) ester (big carboxylate band at 1200 cm-1, carbonyle band 5.85 micrometers )
D) ketone (like aldehyde without fermi resonance, it has no carboxylate stetch at 1205 cm-1, carbonyl band 5.9 micrometers )
E) alcohol (OH band over 3000 cm-1)
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