We report the synthesis and characterization of a new heptanuclear cadmium cluster complex formed within a Schiff base macrocycle and study its surprising dimerization in the solid-state and solution to form capsules.

A simple Schiff base, 2-(2',4'-dihydroxybenzylidene)aminobenzeneboronic acid, was found to show a fluorescence enhancement in the presence of hydroxylated organotins in aqueous solution.

In the title complex, [CuEu(C(19)H(20)N(2)O(4))(NO(3))(3)], the Cu(II) ion is four-coordinated in a square-planar geometry by two O atoms and two N atoms of the deprotonated Schiff base. The Eu(III) atom is ten-coordinate, chelated by three nitrate groups and linked to the four O atoms of the deprotonated Schiff base.

In the title compound, [Cu(C(16)H(12)Br(2)N(2)O(2))], the Cu(II) atom is coordinated in a slightly distorted square-planar geometry by two O and two N atoms of the tetra-dentate dianionic 4,4'-dibromo-2,2'-[ethane-1,2-diylbis(nitrilo-methyl-idyne)]diphen-olate Schiff base ligand.

Eighteen Schiff Bases of 3-amino-2-methylquinazolin-4(3H)-ones were synthesised and screened for anti-inflammatory and diuretic activity. Anti-inflammatory activity was identified in PNG-1, PNG-13, PNG-14, PNG-15 and PNG-17.

Contrary to the stereotype, Jacobsen's catalyst, chiral (salcy)Co(III)OAc adopts an unusual binding mode. The tetradentate {ONNO} ligand does not form a square plane but wraps cobalt in a cis-β fashion while acetate is chelating.

BACKGROUND Indolinone and spiro-indoline derivatives have been employed in the preparation of different important therapeutic compounds required for treatment of anticonvulsants, antibacterial, Antitubercular, and anticancer activities. Schiff bases have been found to possess various pharmacological activities such as antitubercular, plant growth inhibiting, insecticsidal, central nerve system ...

The azomethine double bond in the title Schiff base, C(20)H(19)N(3)O, has an E configuration. The 13-membered carbazolyl fused ring system [r.m.s. deviation = 0.023 (9) Å] is nearly coplanar with the five-membered pyrazole ring [r.m.s. deviation = 0.003 (4) Å]; the dihedral angle between the two systems is 10.8 (2)°. The crystal studied was a non-merohedral twin having a 35% minor component.

The title Schiff base compound, C(19)H(16)N(2)O(3), was derived from the condensation reaction of 2-hydr-oxy-1-naphthyl-aldehyde with 4-methoxy-benzohydrazide. The dihedral angle between the benzene ring and the naphthyl ring system is 6.8 (2)°. In the crystal structure, mol-ecules are linked through inter-molecular N-H⋯O inter-molecular hydrogen bonds, forming chains running along the c axis.

The Cu(II) atom in the title complex, [CuCl(2)(C(12)H(9)IN(2))], has a square-planar coordination being N,N'-chelated by the Schiff base ligand, and by two Cl atoms. The geometry is distorted towards square pyramidal owing to a long Cu⋯Cl inter-action of 2.941 (1) Å. This results in the formation of a zigzag chain structure propagating in the c-axis direction.