Abstract The new complexes of 4-oxo-4-{[3-(trifluoromethyl)phenyl]amino}but-2-enoic acid, HL anion with Mn(II), Co(II), Ni(II), Cu(II) and Pr(III), Nd(III), Sm(III), Gd(III), Dy(III), Ho(III), Er(III), Y(III) were synthesized and some of their physico-chemical properties investigated. The complexes form hydrates with two or three molecules of water. The carboxylate groups act as a bidentate bridging or chelating ligand. The compounds of Pr(III), Nd(III), Sm(III), Gd(III), Dy(III), Ho(III), Er(III) and Y(III) are amorphous solids while those of Cu(II), Co(II), Ni(II) and Mn(II) crystalline ones that crystallize in monoclinic system. Complex of Cu(II) is the centrosymmetric dinuclear compound. Around both Cu(II) cations the tetragonal pyramide is formed. Being heated in air at 293–1173 K the complexes are decomposed in three steps. The oxides of appropriate metals are the final products of complex decomposition. All analysed compounds obey Curie–Weiss law. They show the paramagnetic properties with the ferromagnetic interactions between molecular centres.

中文翻译：

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选定的过渡金属离子与 4-oxo-4-{[3-(trifluoromethyl)phenyl]amino}but-2-enoic acid 的配合物：合成、结构和磁性

摘要 4-氧代-4-{[3-(三氟甲基)苯基]氨基}丁-2-烯酸、HL阴离子与Mn(II)、Co(II)、Ni(II)、Cu(II)的新型络合物) 和 Pr(III)、Nd(III)、Sm(III)、Gd(III)、Dy(III)、Ho(III)、Er(III)、Y(III) 和它们的一些物理化学属性进行了调查。配合物与两个或三个水分子形成水合物。羧酸根基团充当双齿桥连或螯合配体。Pr(III)、Nd(III)、Sm(III)、Gd(III)、Dy(III)、Ho(III)、Er(III)和Y(III)的化合物是无定形固体，而Cu( II)、Co(II)、Ni(II) 和 Mn(II) 晶体，在单斜晶系中结晶。Cu(II)的配合物是中心对称的双核化合物。在两个 Cu(II) 阳离子周围形成四方锥体。在 293–1173 K 的空气中加热，复合物分三步分解。适当金属的氧化物是络合物分解的最终产物。所有分析的化合物都遵循居里-魏斯定律。它们显示了分子中心之间铁磁相互作用的顺磁性。