Hydrazine Complexes of Lanthanides with 3-Acetoxy- and 4-Acetoxybenzoic Acids: Spectroscopic, Thermal, and XRD Studies

Table 3

IR data of lanthanide complexes of 3-abH and 4-abH (4-abH: 4-acetoxy benzoic acid, 3-abH: 3-acetoxy benzoic acid).

Acid	𝜈C-Oester	𝜈C=Oester	𝜈C=Oacid	Complexes	𝜈C=Oasym	𝜈C=Osym	𝜈N-N	𝜈N-H	𝜈O-H	𝜈HOHbending	𝜈C-Oester
	cm^−1	cm^−1	cm^−1		cm^−1	cm^−1	cm^−1	cm^−1	cm^−1	cm^−1	cm^−1
				[La(3-ab)3(N2H4)2]	1602 s	1433 m	937 s, 1001 s	3358 b	—		1315
				[Ce(3-ab)3(N2H4)2]	1599 s	1430 b	962 s, 1003 m	3273 b	—		1277
3-abH	1091 m, 1207 s, 1276 s	1761 s	1676 s	[Pr(3-ab)3N2H4)2]	1587 s	1410 b	929 s, 1003 b	3373 b	—		1300
				[Nd(3-ab)3(N2H4)2]·H2O	1595 s	1429 m	931 s, 1001 m	3277 b	3335 b	862 m	1303
				[Sm(3-ab)3(N2H4)2]·H2O	1589 s	1433 m	931 s, 1005 m	3300 b	3300 b	820 s	1300
				[Gd(3-ab)3(N2H4)2]	1593 s	1430 m	924 s, 1005 m	3268 b	—	—	1300
4-abH				[La(4-ab)3(N2H4)]·H2O	1600 m	1404 b	932 s	3330 b	3380 b	845 s	1157 m
				[Ce(4-ab)3(N2H4)]·H2O	1598 s	1417 s	929 s	3200 m	3379 s	847 s	1285 s
	1126 s, 1225 b, 1290 m	1753 s	1683 b	[Pr(4-ab)3(N2H4)]·H2O	1601 s	1406 b	932 s	3276 b	3343 m	848 s	1326 s
				[Nd(4-ab)3(N2H4)]·H2O	1601 m	1415 b	932 s	3294 b	3374 b	849 s	1285 m
				[Sm(4-ab)3(N2H4)]·H2O	1599 s	1416 m	931 s	3391 b	3390 b	845 s	1159 s
				[Gd(4-ab)3(N2H4)]·H2O	1600 s	1417 s	930 s	3364 b	3396 b	847 s	1239 m

s: sharp, m: medium, b: broad.