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. 2022 Jun 6;8(6):e09648. doi: 10.1016/j.heliyon.2022.e09648

Table 1.

IR spectral data of ligand and its metal complexes in cm−1.

Compound OH C=N C=C O–CH3 M-O M-N
HL 3354 1679 1526 1434 - -
HL-Cu - 1656 1507 1412 573 451
HL-Zn - 1675 1517 1425 586 483