Question

what functional group does this ir present？

%Transmittance -10 4000 3500 3000 3009 2969 2937 2840 2738 2500 Wavenumbers (cm-1) 2000 1679 1575 1594 1500 1509 1458 1442 1425 1393 1314 1301 1213 1254 1181 1155 1108 1021 1000 766 758 642 607 500

Answer 1

Peak at 3009 cm-1 corresponds to sp2 CH stretch and at 2969 for Sp3 CH stretch and at 2840&2738 cm-1 corresponds to aldehyde CH stretch and at 1679 for C=O stretch and at 1594 cm-1 is for C=C and at 1213 for C-O stretches.