Which of the following statements is (are)accurate about the IR spectrum of compounds I,II,and III below? A)Compound I shows absorptions at 2950 and 1700 cm^-1. B)Compound II shows absorptions at 3200-3600 and 1650 cm^-1. C)Compound III shows absorptions at 3200-3600 and 2950 cm^-1. D)Both (Compound I shows absorptions at 2950 and 1700 cm^-1)and (Compound II shows absorptions at 3200-3600 and 1650 cm^-1)are true.

Question

Quizplus · Accepted Answer

Compound I shows a strong absorption at around 2950 cm-1, which is characteristic of C-H stretching in alkanes. It also shows an absorption around 1700 cm-1, which is characteristic of the carbonyl group in ketones or aldehydes. Compound II shows a broad absorption in the range of 3200-3600 cm-1, which is indicative of O-H stretching in alcohols or carboxylic acids. It also shows an absorption around 1650 cm-1, which is characteristic of the carbonyl group in amides or esters. Compound III shows a broad absorption in the range of 3200-3600 cm-1, which is again indicative of O-H stretching in alcohols or carboxylic acids. It also shows an absorption around 2950 cm-1, which is characteristic of C-H stretching in alkanes. Therefore, both statement A and statement B are true, and the correct answer is D.

Which of the Following Statements Is (Are)accurate About the IR