In the title compound, [Sn(C(6)H(11))(2)(C(19)H(14)N(2)O(3))], the Sn(IV) atom is O,N,O' chelated by the deprotonated Schiff base ligand and exists in a cis-trigonal-bipyramidal environment, completed by the two cyclohexyl ligands.

The Cu atom in the title compound, [Cu(C(13)H(9)BrClN(2)O(3)S)(2)], is chelated by two deprotonated Schiff base ligands in a square-planar coordination geometry; the Cu atom lies on a center of inversion. The -NH- group of one anion forms an intra-molecular hydrogen bond to the phenolate atom of the symmetry-related ion.

Both ferromagnetic and ferroelectric properties were observed in two enantiomerically pure nanoscale manganese cluster complexes supported by chiral Schiff base ligands, each of which comprises a 22-nucleus mixed-valence manganese(II/III) supratetrahedral cluster cation and an equilateral-triangle trinuclear manganese(III) cluster anion with C(3) symmetry.

In the centrosymmetric title compound, [Zn(C(12)H(16)NO(2))(2)], the Zn(II) centre is coordinated by two O,N-bidentate Schiff base ligands, resulting in a slightly distorted trans-ZnN(2)O(2) square-planar geometry for the metal ion. Two short intra-molecular C-H⋯O contacts occur in the mol-ecule.

Bimetallic Schiff-base Al(3+) complexes bearing ester functions at the periphery of the ligands are shown to be efficient fluorescent chemosensors for picric acid detection. The prominent role of an association between the chemosensor and the picric acid in the detection process is demonstrated. The detection of picric acid in water is achieved with the sensor deposited on paper.

In the title centrosymmetric mononuclear complex, [Cu(C(14)H(18)NO(2))(2)], the Cu(II) ion, lying on an inversion centre, is four-coordinated by two imine N and two phenolate O atoms from two Schiff base ligands, forming a slightly distorted square-planar geometry.

In the title complex, [Zn(C(13)H(12)NO(3))(2)], the Zn(II) ion is located on a twofold rotation axis and is coordinated by two bidentate Schiff base ligands in a distorted tetra-hedral environment. The complex mol-ecules are stacked in columns along the b axis through C-H⋯O hydrogen bonds.

The title compound, [Co(C(10)H(12)NO)(3)], was synthesized from cobalt(III) fluoride and 2-(propyl-imino-meth-yl)phenol in refluxing methanol. The Co(III) ion is hexa-coordinated by three N and three O atoms from three bidentate Schiff base ligands in an octa-hedral geometry.

The title compound, [Zn(2)(C(14)H(13)N(2)O)(2)(N(3))(2)], is a phenolate-bridged centrosymmetric dinuclear zinc(II) complex. The Zn⋯Zn distance is 3.076 (1) Å. Each Zn atom is five-coordinated by two O and two N atoms from two Schiff base ligands, and by one azide N atom, forming a square-pyramidal geometry.

The asymmetric unit of the title compound, C(18)H(16)F(4)N(2), comprises two half crystallographically independent potentially bidentate Schiff base ligands, with an inversion centre located at the mid-point of the central C-C bond. The crystal packing is stabilized by inter-molecular C-H⋯F and π-π inter-actions [centroid-centroid distance = 3.8283 (11) Å].