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The following spectrum comes from one of these substances : Pent-2-ene / Methylpropanal / N-methylbutan-2-amine / Pentanoic acid / Butan-2-ol / Methylpropanamide Which one ? ( Click on the arrows above !):
Detect characteristic peaks !
$C=O$ at $\approx 1700\;cm^{-1}$
Name the substance !
Methylpropanal