Infrared Spectroscopy, Example #1

Analysis: C₅H₁₀O Help with Analysis

IR Spectrum

C₅H₁₀O

From the molecular formula, the compound has "1 degree of unsaturation" (one double bond, carbonyl or ring).

3400-3200 cm^-1:	no OH or NH present
3100 cm^-1:	no peak to suggest unsaturated CH
2900 cm^-1:	strong peak indicating saturated CH
2200 cm^-1:	no unsymmetrical triple bonds
1710 cm^-1:	strong carbonyl absorbance
1610 cm^-1:	no absorbance to suggest carbon-carbon double bonds

The spectrum seems to be consistent with a simple aliphatic carbonyl compound.

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IUPAC Name: 3-pentanone (diethyl ketone)

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