This was supposed to be triphenylmethanol synthesized from benzophenone. I think
ID: 716843 • Letter: T
Question
This was supposed to be triphenylmethanol synthesized from benzophenone. I think the 2 peaks at 3057 and 3031 may represent a Csp2-H bond and the signal at 1685 representative of a C=O? I know the product was not successfully synthesized from the results of the IR, but I am unsure if I am interpreting it correctly and not sure what the cluster of signals from 3850-3600 mean. %Transmittance 3854.22 3821.66 3751.98 3650,40 3629.51 3057.94 3031.29 1943.32 1876.35 1793.67 1685.45 1654.08 1596.56 1569.32 1476.98 1428.34 1375.05 1343.92 1181.04 1090.66 1169.39 040.84 1005.07 902.52 725.38 609.66Explanation / Answer
Ir spectroscopy is used to analyse a given molecule by tha absorption of frequencies in the IR region. Molecules show stretching and bending vibrations which give particular signals according to the frequency absorbed in yhe IR region.
In the above given IR spectra the spectra is naot purely of one compound but it is the mixture of Benzophenone and triphenyl methanol.
The signal at:
1685 represents the C=O stretching frequency of ketone, present in Benzophenone.
3057-3031 represents Csp2 —H stretching frequency in alkene.
3600-3850 represents the O—H stretching frequency of alcohol.
1943-1793 peaks represent that C=O is present in a conjugated system.
1428-1343 peaks represents O—H bending vibrations.
900-1000 peaks represents C=C bending vibrations in alkene.
700-600 peaks represent strong C—H bending vibrations in 1,2-disubstitued products.
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