Cyclohexene and 2-hexyne both have the molecular formula C₆H₁₀. Any of the following regions of an IR spectrum could be used to distinguish these two compounds.
3020-3100 cm−¹ 2100-2260 cm−¹
1650-1670 cm−¹

Question

Quizplus · Accepted Answer

The regions mentioned correspond to absorptions for different functional groups: 3020-3100 cm^-1 for =C-H stretch (alkenes), 2100-2260 cm^-1 for ≡C-H stretch (alkynes), and 1650-1670 cm^-1 for C=C stretch (alkenes). Cyclohexene (an alkene) and 2-hexyne (an alkyne) can be distinguished by the presence or absence of these absorptions in their IR spectra.

Cyclohexene and 2-Hexyne Both Have the Molecular Formula C6H10

Cyclohexene and 2-Hexyne Both Have the Molecular Formula C₆H₁₀