Please help me analyze the IR spectrum of my sample (first picture sample ID: 1s

Question

Please help me analyze the IR spectrum of my sample (first picture sample ID: 1sm) used propionic acid and isobutanol alcohol (IR spectrums provided) Please circle the functional groups and indicate if the reaction absorption was strong, medium, weak, broad or sharp , with my IR to the standard IRs provided .
:: Agilent Technologies Method Name Estertab User Student Sample D Sample Scans Date/Time: 142016 1:50 37PM Range 4,000.650.00 Background Scans 8 Resolutio 4c-1 System Status Good Fle Location C:Program Fles Aglilent Miorol ab PC Resultitam 2016-07-14T1400-03 a2 3000 25002000 Wavenumber (cm-1) 4000 3500 1000 07/14/20186 14.00.10 Printed by Student 1sm 2016-07-14T14-00-03.a2r Page 1 of 1

Explanation / Answer

Interpretation of Sample IR (third spectrum)

1720 cm-1 (sharp, strong) for C=O stretch

2500-3300 cm-1 (broad, medium) could be due to carboxylic acid O-H stretch

1250 cm-1 (sharp, medium) C-C stretch

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