For the following reaction sequence (it is not necessary to understand the chemistry)what significant change(s)would be expected by IR (ignoring C-H absorptions)?

Question

Quizplus · Accepted Answer

Based on the reactants and products involved in the reaction sequence, it is likely that a C=O bond is being formed during the reaction. This would result in the appearance of a new peak around 1720 cm-1 (the typical IR absorption frequency for C=O bonds) and the disappearance of the peak around 2250 cm-1 (typically associated with a C≡C bond, which would be broken during the reaction). The C-H absorptions are ignored in this question, so they would not influence the interpretation of the changes seen in the IR spectrum.

For the Following Reaction Sequence (It Is Not Necessary to Understand