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 !
$=C-H$ at $\approx 3100\;cm^{-1}$ $C=C$ at $\approx1500\;cm^{-1}$
Name the substance !
Pent-2-ene (Pentene-2)