Example of IR active modes of vibration

Select the four buttons below to show the corresponding vibrating atoms. These are just some of the more prominent absorptions.

Problems
2-pentanone
2962 cm-1 C-H symmetric stretch
1706 cm-1 C=O stretch
1471 cm-1 CH2 bend
1356 cm-1 CH3 bend
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Spectra obtained from Paul Lahti and Eric Motyka, UMass Amherst