Which reagent or test could you use to distinguish between phenylacetylene and vinylbenzene? A)NaOH/H₂O B)Br₂/CCl₄ C)IR Spectroscopy D)CrO₃/H₂SO₄ E)Concd.H₂SO₄

Question

Quizplus · Accepted Answer

IR spectroscopy can be used to distinguish between phenylacetylene and vinylbenzene by analyzing their respective functional groups. Phenylacetylene contains a triple bond (C≡C) which will appear as a sharp absorption around 2100-2260 cm-1, while vinylbenzene contains an sp2 hybridized carbon-carbon double bond (C=C) which will appear as a weaker absorption around 1600-1680 cm-1 in the IR spectrum. None of the other reagents or tests listed can reliably distinguish between these two compounds.

Which Reagent or Test Could You Use to Distinguish Between