Table 4 Frequencies of important groups of the complexes.

From: Synthesis, characterization, and hydrogen bonding analysis of copper complexes with acetate bridging: insights into interactions in crystal networks

Complex 1

Complex 2

Group

ν (cm−1)

Group

ν (cm−1)

NH2 (Stretching Aromatic)

3335, 3412

NH2 (Stretching)

3330, 3412

C=N

1618

C=N

1623

C=C (Aromatic)

1545

C=C (Aromatic)

1551

C-H (Stretching Aromatic)

3154

C-H (Stretching Aromatic)

3155

C-H (Aliphatic)

2924

C-H (Aliphatic)

2703

C=O

1644

C=O

1745

C-H (Acetylacetone)

2852

O-H

3484

C-N

1397

C-N

1404

C-H (Bending Aromatic)

780

C-H (Bending Aromatic)

779

NH2(Out-of-plane bending)

826

NH2(Out-of-plane bending)

827

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