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What is the key comparsion meso hydrobension and benzil have a carbonyl in their ir spectrum
Accepted Answer
Both meso-hydrobenzoin and benzil contain a carbonyl group (C=O) which is a key functional group that absorbs strongly in the infrared (IR) spectrum. The carbonyl stretching frequency in the IR spectrum can be used to distinguish between these two compounds:
Benzyl: The carbonyl stretching frequency is typically around 1690-1710 cm⁻¹ due to the presence of an aromatic ring.
Meso-hydrobenzoin: The carbonyl stretching frequency is typically around 1700-1720 cm⁻¹ due to the presence of two hydroxyl groups. The exact frequency may vary slightly depending on the specific substituents and the environment of the carbonyl group.
This difference in frequency is attributed to the electron-withdrawing effect of the aromatic ring in benzil, which slightly shifts the carbonyl stretching frequency to lower values compared to meso-hydrobenzoin.
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