Table 4. Comparison of chemical shifts in the ligand and complex for the most deshielded protons in the complex.

Protons of the ligand	δ (ppm)	Protons of Ni–DAPH complex	δ (ppm)	Δδ (ppm)
14H	5.982	12H	8.104	2.122
		31H	8.224	2.242
		50H	6.330	0.348
		69H	9.208	3.226
15H	7.3238	15H	8.157	0.8332
		34H	8.109	0.7852
		53H	7.658	0.3342
		72H	7.959	0.6352