Label the spectral numbers (2.6 ?? , 3.2 ?? , etc.) on the part of the molecule
ID: 1034735 • Letter: L
Question
Label the spectral numbers (2.6 ?? , 3.2 ??, etc.) on the part of the molecule where they belong. The molecule letter is written by its spectral data. Thanks
NMR spectra 17. The molecules and spectral data below are presented in a random order. Enter the appropriate letter that corresponds to each spectrum number on your answer sheet. HO Spectrum #1 Spectrum #2 Spectrum #3 Ar 2.66 (2H, q) ? 3.2 8 (3H, s). 3.78 (2H, t) 9.68 (1 H, t)? 2.4 8 (2H, t) 3.2 ? (3H, s) 3.78 (2H, t) 11.0 ? (1H,s) 3.2 8 (3H, s) 3.68 (2H, t) 4.3 8 (2H, t) 8.1 8 (1H, s)Explanation / Answer
Yes answer is correct
Spectrum assignment of signal.
The quartet at 2.6 ppm is due methylene proton attached aldehyde, it will couple with adjusant methylene group and long range coupling with aldehyde group.
The singlet at 3.2 ppm is due to methoxy group
The tiplet at 3.7 is due methylene group attached to oxygen atom
The triplet at 9.7 is due to aldehyde hydrogen, it will have long range coupling with methylene attached to aldehyde group.
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