. 2024 Nov 25;29(23):5555. doi: 10.3390/molecules29235555

Table 1.

Chemical shifts and IR bands of imine ligands (a–d) and their complexes (A–D).

Compound	FT-IR (C=N) (cm⁻¹)	NMR ¹H (ppm)	NMR ¹³C (ppm)
Imina [a]	1647	1.57 (H-3), 4.60 (H-2), 8.45 (H-10)	24.09 (C-3), 68.90 (C-2), 160.70 (C-10)
Imina [b]	1646	1.59 (H-3), 4.63 (H-2), 8.45(H-10)	24.73(C-3), 68.88(C-2), 160.56 (C-10)
Imina [c]	1645	1.63 (H-3), 4.61 (H-2), 8.45 (H-10)	24.46 (C-3), 69.34 (C-2), 160.30 (C-10)
Imina [d]	1644	1.36 (H-3), 4.61 (H-2), 8.44 (H-10)	24.40 (C-3), 68.96 (C-2), 160.19 (C-10)
Complex A	1597	1.73 (H-3), 5.89 (H-2), 8.44 (H-10)	22.89 (C-3), 63.52 (C-2), 162.68 (C-10)
Complex B	1597	1.73 (H-3), 5.89 (H-2), 8.71 (H-10)	23.14 (C-3), 63.51 (C-2), 162.40 (C-10)
Complex C	1597	1.66 (H-3), 5.43 (H-2), 8.23 (H-10)	20.16 (C-3), 64.17 (C-2), 161.55 (C-10)
Complex D	1597	1.64 (H-3), 5.41 (H-2), 8.30 (H-10)	23.23 (C-3), 64.22 (C-2), 161.77 (C-10)