A student sees a strong absorption between 1680 and 1750 cm-1 in the infrared spectrum of an unknown organic compound. This suggests the compound has a:
Answer and explanation
Correct answer: D. Carbonyl group, C=O
- Step 1: Each bond type absorbs infrared radiation in a characteristic wavenumber range.
- Step 2: 1680 to 1750 cm-1 is the range for C=O stretching.
Answer
a carbonyl group.
Why not the others: O-H absorbs between about 2500 and 3550 cm-1; C=C absorbs near 1620 to 1680 cm-1; C-H absorbs near 2850 to 3300 cm-1.
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