Consider the three organic compounds drawn below.Which of the following statements is (are)true about the IR spectra of I,II,and III?

Question

Quizplus · Accepted Answer

I:

- Strong absorption at 2950 cm^-1 due to C-H stretching in aliphatic compounds
- Strong absorption at 1700 cm^-1 due to C=O stretching in a carbonyl group (likely an aldehyde or ketone functional group)

II:

- Strong absorption at 2950 cm^-1 due to C-H stretching in aliphatic compounds
- Strong absorption at 2250 cm^-1 due to C≡C stretching in a terminal alkyne group

III:

- Strong absorption at 2950 cm^-1 due to C-H stretching in aliphatic compounds
- Strong absorption in the range of 3200-3600 cm^-1 due to O-H stretching in a hydroxyl group (likely an alcohol functional group)

Therefore, statements (A) and (B) are false, and statement (C) is only true for III. The correct answer is (D), as both statements related to I and III are true.

Consider the Three Organic Compounds Drawn Below