Synthesis and Thermal Characterization of Lanthanide(III) Complexes with Mercaptosuccinic Acid and Hydrazine as Ligands

Table 3

Energies (in cm⁻¹) of the bands of complexes.

Molecular formula of the complexes	Bands observed for complexes; (bands of aquo complexes)	Assignments
[Pr(N2H4)2{CH2(COO)CH(SH)(COO)}1.5] · (H2O)	20900 (21000)	^3P0
	22800 (23500)	^3P2
[Nd(N2H4)2{CH2(COO)CH(SH)(COO)}1.5] ·(H2O)	17100 (17358)	^4G5/2
	18400 (19289)	^4G7/2
[Sm(N2H4)2{CH2(COO)CH(SH)(COO)}1.5] ·(H2O)	17680 (18200)	^4G5/2
	18700 (19300)	^4F3/2
[Gd(N2H4)2{CH2(COO)CH(SH)(COO)}1.5] ·(H2O)	32200 (32700)	^6P7/2