Transmittance 166485 160976 160235 155968 148172 141615 1378

%Transmittance 1664.85 1609.76 1602.35 1559.68 1481.72 1416.15 1378.14 1328.34 1311.38 1223.73 1206.13 1183.66 1170.55 1117.69 1099.02 1078.24 1032.51 1014.48 985.47 978.56 910.83 89767 868.75 840.29 821.36

Solution

1664 cm^-1 C=O stretching conjugated ketone.

1609 cm^-1 C=C stretching conjugated ketone.

1378 cm^-1 C-H bending conjugated ketone.

840 cm^-1 C-Cl bending conjugated ketone.