Complexes of Cu(II) Ions and Noncovalent Interactions in Systems with L-Aspartic Acid and Cytidine-5'-Monophosphate

Table 2

Differences between ¹³C NMR and ¹³C NMR chemical shifts for the ligands in the Asp/CMP system in relation to the free ligands [ppm].

	Asp				CMP
pH	^31P	C(1)	C(2)	C(3)	C(2)	C(4)	C(5)	C(6)	C(5^′)	P
3.0	0.049	0.025	0.022	0.002	0.982	0.760	0.057	0.048	0.044	0.018
4.2	0.000	0.013	0.070	0.054	0.861	0.661	0.040	0.047	0.060	0.025
5.5	0.053	0.047	0.027	0.040	0.440	0.593	0.068	0.054	0.099	0.040
8.0	0.454	1.048	0.227	1.322	0.191	0.198	0.068	0.064	0.111	0.105