Aqua­[tris­(2-{5-[(4-methyl­phenyl)diazen­yl]-2-oxidobenzyl­idene­amino}­eth­yl)amine]­samarium(III) acetonitrile monosolvate

In the title compound, [Sm(C₄₈H₄₅N₁₀O₃)(H₂O)]·CH₃CN, the Sm^III ion is coordinated by the hepta­dentate tris­(2-{5-[(4-methyl­pheny)diazen­yl]-2-oxidobenzyl­idene­amino}­eth­yl)amine trianionic ligand and a water mol­ecule. The resulting SmN₄O₄ coordination polyhedron is a distorted square anti­prism. In the crystal, complex mol­ecules are linked by O—H...O hydrogen bonds.

A second monoclinic polymorph of di-μ-chlorido-bis­(chlorido{2-[(4-ethyl­phen­yl)imino­meth­yl]pyridine-κ²N,N′}copper(II))

The title compound, [Cu₂Cl₄(C₁₄H₁₄N₂)₂], is a new polymorph of a previously reported compound [Dehghanpour et al. (2011). Acta Cryst. E67, m1296]. The current polymorph was obtained from an acetonitrile solution of the title compound. Like the first polymorph, it is monoclinic (space group P2₁/c). The unique Cu^II ion in the title centrosymmetric dinuclear complex is in a distorted trigonal–bipyramidal coordination environment formed by the bis-­chelating N-heterocyclic ligand, two bridging Cl ligands and one terminal Cl ligand. In the crystal, weak C—H...Cl hydrogen bonds are observed in addition to π–π stacking inter­actions, with a centroid–centroid distance of 3.6597 (18) Å.

Diiodido{2-[(4-meth­oxy­phen­yl)imino­meth­yl]pyridine-κ²N,N′}zinc

In the title complex, [ZnI₂(C₁₃H₁₂N₂O)], the Zn^II atom has a distorted tetra­hedral coordination. The organic ligand is bidentate, coordinating the Zn^II atom via the two N atoms. The benzene and pyridine rings are oriented at a dihedral angle of 11.67 (9)°. In the crystal, weak C—H...I and C—H...O hydrogen bonds are observed, in addition to π–π stacking inter­actions, with a centroid–centroid distance of 3.72 (5) Å.