Question

Identify the peaks and structure of the compound formed from the reaction of vanillin and acetic anhydride in the presence of base in the following NMR and IR.

LFI: 90.356. LEX: c eft Q ppg. 00.6 100.4 100.2 00.0 99.8 99.6 99.4. 99.2 99.0 98.8 98,6 98.4 98.2 2000 2500 3000 4000 3500 Wave numbers (cm-1) Mon Apr 24 16:58:05 2017 (GMT 05:00) FIND PEAKS: Mon Apr 24 16:57:47 2017 (GMT-05:00) Spectrum: 4000.0 400.0 Region Absolute threshold: 100.061 Sensitivity Peak list Position: 659.7 Intensity: 99.782 Position: 669.4 Intensity: 99,984 99.946 Position: 681.6 ntensity Position: 694.5 Intensity: 99.87 719.3 Intensity: 99,888 Position Position 727.0 Intensity: 99.918 Position: 742.7 Intensity: 99.167 Position: 759.0 Intensity: 100.042 500 1000 500 PPM

Answer 1

Answer:

(2.3,s) СН з 11 HO H104 HF Acetic anhydride H3C (5.4,s) O Vaniline O-acetyl vaniline (8.7) (13.0) HB Ha 10 I:1492 296 us Fl: 90.356 1: 570.1 HILACO.ppg 100.6 100.4 1002A 100.0 99.8 99.6 99.4 99.2 99.0 98.8 98.6 98.4 96.2 aldehydic C-o stretch он sretch in Unreacted vaniline Multisubstituted Aromatic ring 4000 3500 2000 1500 1000 500 Wavenumbers (cm-1)

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