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

Table 1

Analytical and IR data.

Molecular formula; of complexes				Analytical data (%)						IR data
				Carbon	Hydrogen	Nitrogen	Sulfur	Hydrazine	Metal	𝑣O-H	𝑣S-H	𝑣C=O	𝑣C=O	𝑣C=O	𝑣N-N	𝑣NH
	Colour	Yield %	D.pt/ °C	Fd.	Fd.	Fd.	Fd.	Fd.	Fd.	(H2O)		sym	Asym	asy-sym
				(cald.)	(cald.)	(cald.)	(cald.)	(cald.)	(cald.)	cm^−1	cm^−1	cm^−1	cm^−1	cm^−1	cm^−1	cm^−1
[La(N2H4)2{CH2(COO); CH(SH)(COO)}1.5]·( H2O)	White	65	103	14.4	4.5	11.3	9.3	13.2	28.8	3346	2542	1319	1533	214	945	3346
				(14.5)	(4.6)	(11.1)	(9.4)	(13.3)	(28.9)	(b)	(m)	(s)	(s)		(m)	(b)
[Pr(N2H4)2{CH2(COO); CH(SH)(COO)}1.5]·(H2O)	Light	65	95	14.5	4.5	11.5	9.3	13.1	29.1	3334	2543	1319	1531	212	945	3242
	Green			(14.4)	(4.6)	(11.1)	(9.4)	(13.2)	(29.2)	(b)	(m)	(s)	(s)		(m)	(b)
[Nd(N2H4)2{CH2(COO); CH(SH)(COO)}1.5]·(H2O)	Light	65	93	14.4	4.5	11.01	9.4	13.2	29.6	3355	2543	1319	1536	217	945	3355
	violet			(14.3)	(4.6)	(11.0)	(9.3)	(13.1)	(29.7)	(b)	(m)	(s)	(s)		(m)	(b)
[Sm(N2H4)2{CH2(COO); CH(SH)(COO)}1.5]·(H2O)	Dull	60	95	14.2	4.4	11.7	9.1	13.1	30.4	3334	2553	1311	1556	245	948	3242
	white			(14.1)	(4.5)	(11.8)	(9.2)	(13.0)	(30.5)	(b)	(m)	(s)	(s)		(m)	(b)
[Gd(N2H4)2{CH2(COO); CH(SH)(COO)}1.5]·(H2O)	Dull	60	95	14.8	4.4	11.6	9.2	12.9	31.5	3333	2555	1309	1543	234	945	3248
	white			(14.9)	(4.5)	(11.7)	(9.1)	(12.8)	(31.6)	(b)	(m)	(s)	(s)		(m)	(b)

(s): sharp, (b): broad, and (m): medium.