Synthesis Characterization and Biological Activities of Coordination Compounds of 4-Hydroxy-3-nitro-2H-chromen-2-one and Its Aminoethanoic Acid and Pyrrolidine-2-carboxylic Acid Mixed Ligand Complexes

Table 1

Relevant infrared spectra bands for the ligands and complexes (cm⁻¹).

Bands	hnc			1	2	3	4	5	6
(cm^−1)
(O–H)	3435			3468	3526	3430	3446	3446	3580
(N–O)	1522			1557	1568	1560	1574	1573
(C–O–H)	1303
(O–H)				1207	1214	1125	1202	1211	1216
(C–O)	1009			1057	1071	1046	1151	1068	1045
(C=C)	1601			1603	1607	1605	1608	1612	1603
(C=O)	1701			1652	1668
(N–H)		3196	3152			3301	3374	3233	3510
(N–H)						3263	3254
(COO)		1590	1640			1669	1672	1667	1667
(COO)		1480	1492			1449	1466	1467	1442
(C–N)				1341	1552	1275	1380	1330	1308
(M–N)						563	565	562	557
(M–O)				637	621	618	655	680	604