Synthesis, Characterization, and Antimicrobial Activities of Coordination Compounds of Aspartic Acid

Table 3

Relevant IR bands for the compounds.

Band	(NH2)	(COO^−)	(COO^−) (cm^−1)	(M–N)	(M–O)
Aspartic acid	3380w	1650s	1583s	—	—
Cu(asp)2	3433m	1641w	1509w	552s	656m
Cd(asp)2	3333w	1650s	1539s	549s	724s
Ni(asp)2	3357w	1674s	1559s	548w	721w
Co(asp)2	3143br	1684s	1561s	566w	665m
Mn(asp)2	3309w	1678m	1547w	550s	598m
Na2[Cu(asp)2]	3238, 3142br	1678s, 1595m	1503s, 1371s	520m	623br
Na2[Cd(asp)2]	3025br	1687s	1532br	598s	619s
Na2[Ni(asp)2]	3190w,br	1667sh	1547s	500m	672s
Na2[Co(asp)2]	—	1684s, 1584w	1512s, 1375s	546s	604s
Na2[Mn(asp)2]	3357br	1686s	1542m	550s	658s

asp: aspartic acid; w: weak; m: medium; s: strong.