Table 8.

Infrared spectral data of BIA and its Ln(III) complexes (b = broad, s = strong, m = medium, w = weak, BIA⁻Na⁺ = sodium salt of ligand).

Compound	νoH	νNH	νC=O	ν asyCOO	ν symCOO	Δν = ν asyCOO–ν symCOO	ν 4	ν 1	ν 3	ν 5	ν 6	ν 2
BIA	3391	3164 s	1647s	—	—	—	—	—	—	—	—	—
(BIA)Na	—	3164s	—	1586s	1441s	145	—	—	—	—	—	—
(2)	3388b	3055s	—	1591sb	1431s	160	1525	1313	739	708	858	998
(3)	3388b	3048s	—	1591sb	1431s	160	1525	1313	745	705	850	997
(4)	3388b	3049s	—	1591sb	1437s	154	1525	1319	745	695	850	998
(5)	3375b	3048s	—	1591sb	1431s	160	1535	1319	745	707	850	998
(6)	3388b	3055s	—	1591sb	1437s	154	1529	1313	739	702	856	998
(7)	3394b	3054s	—	1597sb	1442s	155	1528	1316	742	707	850	999
(8)	3394b	3054s	—	1591sb	1442s	149	1528	1319	745	701	850	996
(9)	3376b	3055s	—	1585sb	1437s	148	1528	1320	745	702	856	996
(10)	3388b	3055s	—	1597sb	1437s	160	1529	1320	745	702	856	998