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The Gd atom in the title compound, [Gd(C33H39N11)]Cl3·3H2O, lies on a position of 32 point symmetry and exhibits a tricapped trigonal prismatic coordination geometry. A twofold rotation axis passes through the coordinated N atom and the opposite C atom of the pyridyl ring of the ligand, while a threefold rotation axis passes through the aliphatic N atom. The Cl atom and O atom of the uncoordinated water mol­ecule both lie on twofold rotation axes.

The title dinuclear complex, [Cu2(C12H17FN3O2)2](ClO4)2·CH4O, was synthesized by condensation between diethyl­ene­triamine and 2-form­yl-4-fluoro-6-hydroxy­methyl­phenol in the presence of copper(II). It contains two similar units, which are linked by Cu—O bonds. The approximate planes of the two units are parallel to each other, and π–π inter­action exists between the two units.

The title complex, [Gd((C24H28N4O4)(NO3)2(H2O)](NO3)·0.5CH3OH·1.75H2O, contains a gadolinium ion with a distorted monocapped square antiprismatic coordination.

The dimeric title complex, [Ho2(CH3COO)6(C12H8N2)2], lies about a centre of symmetry. Each cation is coordinated by a chelating 1,10-phenanthroline and two chelating acetato ligands, one of which also bridges the two Ho atoms. Two other bridging acetate ligands complete the coordination of the nine-coordinate holmium(III) atoms.

The title complex, [Cu2(C23H26Cl2N4O2)](ClO4)2, has been synthesized by condensation between N,N′-dimethyl-N,N′-bis­(3-formyl-5-chloro­salicyl­idene)ethyl­enediamine and 1,3-propane­diamine in the presence of copper(II). The complex is a phenol-based macrocyclic dinuclear complex, with the two CuII ions in N(amine)2O2 and N(imine)2O2 sites, and a Cu⋯Cu separation of 3.0138 (14) A.

In the asymmetric unit of the title compound, [LuIII(C26H34N6O2)(NO3)2]NO3·0.5H2O·0.25C4H8O2, there are two cations and two anions of the title complex, together with a water molecule and half a molecule of ethyl acetate. The Lu atom exhibits a nine-coordinate distorted tricapped trigonal-prismatic coordination geometry. The water mol­ecule is disordered, with occupation factors of 0.4 and 0.6.