elow, click on the overlapping peaks associated with the -N-H deformation (bending - scissoring) vibration and aromatic C=C stretching. D D 4000 3000 2000 1500 1000 500 HAVENUMBERI -11

(Knoevenagel) - Identify all the peaks from the IR spectrum. Be sure to list the cm-1 and the bond that corresponds to each peak.

Identify likely groups and identify likely signals on the IR. (ex. OH, NH, C=C, C-H sp3, aromatic etc)

12 of 15 The range of IR absorption of C=O stretching vibrations (including ketones, aldehydes, carboxylic acids, esters, acyl halides, anhydrides and amides) is: 2260-2240 cm1 -1 1740-1690 cm" 1650-1550 cm1 1850-1550 cm1

Please provide the C13NMR spectra for the following compounds:

ii,iii,iv

11

Rank the following bonds in order of increasing stretching frequency (cm-1) in IRspectroscopy: