(Solved): This is an IR Spectroscopy graph of a dehydration reaction (cyclohexanol becoming cyclohexene)  ...

This is an IR Spectroscopy graph of a dehydration reaction (cyclohexanol becoming cyclohexene) 

IR spectroscopy can also be used to identify a specific molecular structure by analysis of the fingerprint region, \( <1500 \mathrm{~cm}^{-1} \). Peaks in this region can't be assigned to specific bonds since they corresponds to vibrations that "spread out" over the molecule, but their frequencies are characteristic of a specific molecule. Given below is the IR spectrum of cyclohexene. What do the peaks below \( 1500 \mathrm{~cm}^{-1} \) signify? These frequencies are specific to cyclohexene ONLY These frequencies indicate that the sample might be impure These frequencies indicate background noise These frequencies are specific to any unreacted starting cyclohexanol