Table 4: NMR Spectral Data for Cu (II) Complexes.

Peak / Signal	CP[PTU]A (δ)	CP[PTU]NA (δ)
–CH3-CH2-R	0.88	0.90
–CH2-CH2-R	1.20	1.22
–NH2	3.70-3.78	3.65-3.70
Tautomeric –NH2	-	-