Question

. Please identify the compound and draw the chemical structure. Reasonable assignments of all significant absorption bands in the region between 4000cm-1 and 1350cm-1 (i.e. aliphatic C-H stretchinf (specify carbon hybridization), O-H stretching, N-H stretching, C=O (indicate ketone/ester/acud/amide, etc.) stretching, C-O bending etc.).

What things might make the IR spectra misleading?

535- 3741.00 -0TTTTTTTTT 4000 3500 3000 FTIR Measurement 2500 2000 1750 1500 1250 1000 750 500 1/cm No Peak 401.19 655.8 1087.85 125759 1381.03 1496.76 1658.78 2862.36 2931.8 3525.88 3741.9 3 865.35 Intensity 66.54 57.434 36.432 65.37 35.939 68.381 8.71 74.565 71.952 72.152 74.861 74.811 Corr. Intensity 4.838 26.661 54.262 24.443 40.319 11.143 80.19 2.945 5.424 5.296 1.822 0.424 Base (H) 424.34 840.96 1134.14 1288.45 1419.61 1543.05 1813.09 2893.22 3039.81 3633.89 3780.48 3880.78 Base (L) Base (L) 393.48 632.65 910.4 1180.44 1296.16 1473.62 1550.77 2654 05 2900.94 3124.68 3703.33 3788. 19 Area 4.741 11.851 22.765 18.862 20.589 8.404 59.111 20.457 15.377 57016 .228 1 1.344 Corr. Area 0.391 2.967 15.06 3.939 9.234 1.898 46.133 10.553 1.253 5.665 0.339 0.189 10 9 11 12

Answer 1

Answer IR having two regions s. e. fingerprint (600-140 enly and functional group regions (1900-3000 cm) Functional group regions will indicate only the functional groups present not about the namber of carbon or hydrogen atoms present in a molecule, In 1st spectra, red coloris: it is not aromatic beacause characteristic Peak are not obtained in you - 2000 cnl. 3410 cm - weak intensity peak - carbongle . overtone 2877 - WEAK intensity Reak-CH-STRACHING cyclic compound 2808 - WEAK intensity Peak - et straching of O double bond 1504, 1597, 1419 strong intensity peak - presence of carbonyl group but due to conjugation can be a cyclo-hex-2-enone