How would the following compounds be distinguishable using IR and ¹H NMR spectroscopy? A)The ¹H NMR spectrum of compound I will have two singlets. B)The C=O absorption in the IR spectrum of compound I will be at a higher wave number than that of compound II. C)The ¹H NMR spectrum of compound II will have one triplet at a chemical shift of about 4. D)The ¹H NMR spectrum of compound I will have two singlets AND the C=O absorption in the IR spectrum of compound I will be at a higher wave number than that of compound II.

Question

Quizplus · Accepted Answer

In compound I, the presence of two different types of protons (in different chemical environments) will result in two singlets in the ¹H NMR spectrum. Compound I contains a ketone functional group, which should show a C=O stretching vibration in the IR spectrum at a higher wave number than compound II, which does not have a carbonyl group. In compound II, the presence of one type of proton coupled to two neighboring protons will result in a triplet at a chemical shift of about 4 in the ¹H NMR spectrum. Therefore, the best choice is D, which combines both of these distinguishing features.

How Would the Following Compounds Be Distinguishable Using IR and 1H

How Would the Following Compounds Be Distinguishable Using IR and ¹H