Table 2 IR spectral (cm−1), and 1H-NMR (δ, ppm) data of the imine ligand (L), the co-ligand (bpy), and its mixed ligand complexes.

From: Synthesis, structural characterization, and antimicrobial evaluation of new mononuclear mixed ligand complexes based on furfural-type imine ligand, and 2,2′-bipyridine

Compound under study

IR spectra (cm−1)

1H-NMR (δ, ppm)

ν(OH2)

ν(C = N) azomethine / pyridyl

ν(C–O–C) (furan)

δ(py) (bending)

υ(M–O)

υ(M–N)

Additional bands

L

–

1614

–

1284

–

–

–

–

s (8.47, HC = N); m (8.12–8.10, 3H–fur., J = 8; 7.03–7.01, 3H–fur., J = 10; 5.89–5.85, 3H–arm., J = 16); 2.56 (s, C–CH3)

2,2′-bipyridine

–

–

1553

–

660

–

–

–

 

[FeL(bpy)]Cl3·H2O

3411

1602

1569

1309

648

582

481

–

–

[CoL(bpy)]Cl2·3H2O

3440

1601

1568

1289

651

580

495

–

–

[CuL(bpy)]Cl2

–

1602

1567

1286

659

580

484

–

–

[CdL(bpy)](NO3)2

–

1598

1587

1299

649

596

497

1384; νNO3 ionic

s (8.99, HC = N); m (7.64–7.61, 3H–fur., J = 10; 7.15–7.12, 3H–fur., J = 11.2; 5.73–5.72, 3H–arm., J = 5.2); 2.72 (s, C–CH3)

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