Question

11) Which one of the following compounds corresponds to the following spectra? (6) 5 432 11 10 9 87 ppm c) d) b) a) OH OCH3 OH


The #s at the bottom of the graph on the right, from right to left, read 500, 1000, 1500, 2000, 3000, and 4000

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Answer #1

Answer option D) Aldehyde

H-NMR

Peak at 9.5 ppm corresponds to aldehydic H atom

Peak at 7.5 pm for 5 aromatic and 1 benzylic H atom

Peak at 6.7 ppm for 1 vinylic H atom

IR spectrum

Peak around 1700 cm^-1 for carbonyl (CO) stretch

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