Research Article
Lanthanide Complexes of Substituted -Diketone Hydrazone Derivatives: Synthesis, Characterization, and Biological Activities
Table 3
1HNMR spectroscopic data of the ligands (δ/ppm).
| | 2 CH3 groups of azoform (d, 3H) | 2 CH3 groups of hydrazoform (d, 3H) | 2 CH groups of azoform (d, 2H) | NH groups of hydrazoform (D2O exchangeable, s, 1H) | Aromatic + methylenic protons (m) |
| L1 | 1.588 | 2.50 | 3.41 | broad | 7.12–7.50 | L2 | 1.61 | 2.50 | 3.36 | broad | 6.85–7.75 | L3 | 1.60 | 2.495 | 3.39 | broad | 6.70–7.60 | L4 | 2.00 | 2.44 | 3.52 | broad | 6.71–7.54 | L5 | 2.24 | 2.49 | 3.85 | broad | 6.56–7.63 | L6 | 1.37 | 2.50 | 4.00 | 4.80, 7.77 | 6.91–7.25 | L7 | 1.436 | 2.50 | 3.34 | 4.83, 7.98 | 6.83–7.68 | L8 | 1.45 | 2.50 | 3.34 | 4.79, 8.21 | 7.06–7.77 | L9 | — | — | 3.45 | — | 6.42–7.97 | L10 | — | — | 3.40 | — | 6.62–7.95 | L11 | — | — | 3.50 | — | 6.50–7.12 | L12 | — | — | 3.38 | — | 7.39–8.23 |
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