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Three new lanthanide(III) complexes of the type [Ln(PBH) 2 (NO 3 )(NCS)(H 2 O)]NO 3 ·nH 2 O (PBH = 2-pyridinecarboxaldehyde benzoyl-hydrazone) have been prepared from the complexes [Ln(PBH) 2 (NO 3 ) 3 ]·CH 3 COCH 3 ·2H 2 O by anion metathesis reaction and studied by elemental analyses, IR and UV-Vis spectra. The crystal structure of the [Ce(PBH) 2 (NO 3 )(NCS)(H 2 O)]NO 3 ·2.35H 2 O complex was determined by X-ray diffraction. The crystals of the compound isothiocyanato-nitrato-aquo-bis[N -(2-pyridinylmethylene)-Nbenzoyl-hydrazino]-cerium(III) nitrate 2.35 hydrate are monoclinic with crystallographic P2 1 /n symmetry. The coordination sphere consists of two tridentate 2-pyridinecarboxaldehyde benzoylhydrazone, one bidentate nitrate, one isothiocyanate, and one water molecule as ligands. The coordination polyhedron around the cerium atom can be described as a distorted bicapped square antiprism. The coordination of the hydrazone ligand to the metal atom is accomplished through the pyridine nitrogen, the azomethine nitrogen, and the carbonyl oxygen.

The reaction of copper acetate and diethylenetriamine with piperidinium phthalate in water gives the phthalato-bridged one-dimensional complex, CuII(μ-phthalato)(diethylenetriamine). In the complex each magnetic ion is in a square-pyramidal environment of polyamine nitrogens and carboxylato oxygens; the second carboxylato group of each phthalato bridge remains noncoordinated. The possible mechanisms of the weak intra- and interchain antiferromagnetism of the complex are investigated.