Question

compare the starting IR SPECTRA of isomyl acetate and the ending product. what are the reasons for the changes. thank you

starting Perinne Soetom Version 1041 Monday, March 02, 2020 321 Analyst Administrator Monday, March 02, 2020 3:21 PM 101 3316 rom.1. 0502T %T 1211 pocm-1. 20%T 124.9cm-1..10%T/ 0:15,25 m 1,82.97%T 1385.15cm-1.83.50%T 1466 29cm-1, 80.50%T 1367.25cm-1.80.70%T 1169.420m 186.44%T 493 0cm-1,76 74%T 20/1300-1,76.40%T 2920.920m-1. 74.42%T 965.900m-1.70.00%T 2965 65cm-1, 67.70%T 3500 3000 1056.81om58.74%T 1007.10 1.64 58%T 1000 2500 2000 1500 cm-1 450 Administrator 21 Sample 021 By Administrator Date Monday, March 02 2020 Spectrum Name Administrator 21 Source Spectra Resulta Number of Peaks 15

Answer 1

H3C Starting: 3316: -OH stretching 2955 and 2871: sp3 C-H stretching 1466: CH2 scissoring Н, С ОН 1385: C-H bending 3-methylbutan-1-01 1124: C-o stretching This is an isoamyl alcohol there is no carbonyl group and hence no peak is observed between 1700-1750. However in final product the isomyl acetate contains the ester carbonyl and in final product the alcohol group is not present. Final: -OH stretching absent 2958 and 2872: sp3 C-H stretching 1739: ester C=O stretching 1466: CH2 scissoring H2C CH3 1387: C-H bending 1231: C-o stretching 3-methylbutyl acetate H3c Thus in final compound the alcohol is converted to acetate ester and hence there is no alcohol -OH stretching. But due to esterification the ester carbonyl peak is present in final product. Н4С H3C OH H₂C o H3c1 Starting CH3 Final