For the following reaction, which of the following change(s) in the IR spectrum

Question

For the following reaction, which of the following change(s) in the IR spectrum is consistent with conversion of the reactant to the product?

Please explain! Thank you!

Question 15 0/1 point For the following reaction, which of the following change(s) in the IR spectrum is consistent with conversion of the reactant to the product? 0 HgSO4 1) absorption at 2150 cm1 should disappear 2) absorption at 3300 cm 1 and 2150cm1 should disappear 3) absorption at 2250 cm1 should disappear, a new absorption at 3300 cm1 should appear 4) absorption at 1650 cm1 should disappear, a new absorption at 3300 cm1 should appear 5) absorption at 3300 cm1 and 2150cm"1 should disappear, a new absorption at 1720 cm1 should appear

Explanation / Answer

option 5 is correct

Explanation: absorption at 3300 cm-1 is due to the presence of triple bond carbon attached to proton present in reactant.

absorption at 2150 cm-1 is due to the presence of C triple bond C. which is present in reactant.

These two bands disappear in product as product do not contain any triple bond.

A new absorption at 1720 cm-1 is due to the presence of carbonyl group.

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