An unknown compound with the molecular formula C₄H₇N produces the IR spectrum shown below.What is the most likely identity of the unknown compound?

Question

Quizplus · Accepted Answer

The IR spectrum shows a strong peak at around 3300 cm-1, which is indicative of an N-H bond. Additionally, there are peaks at around 2900 cm-1 and 1400 cm-1, which are typical of C-H bonds. The peak at around 2200 cm-1 suggests the presence of a triple bond, which is most likely a carbon-carbon triple bond in an alkyne. Finally, there are multiple peaks in the fingerprint region (below 1500 cm-1), which are difficult to interpret without additional information. Taking all of these features into account, the most likely identity of the compound is a terminal alkyne with an NH group, which is consistent with choice C.

An Unknown Compound with the Molecular Formula C4H7N Produces the IR

An Unknown Compound with the Molecular Formula C₄H₇N Produces the IR