New unsymmetrical Schiff bases containing azomethine moiety with simple aromatic section in one side and ferrocene fragment attached imine on the other have beensynthesized. Advent of metal-to-ligand charge transfer band for coordination Cu2+ ions receptors appropriate changes UV-Visible spectra metal ion combination sensor is reported. Observed extravagant ΔEpvalues suggest quasi-reversible pr...

By utilizing different coordination properties of a lanthanide ion and a transition metal ion, a heterometallo-supramolecular polymer with Eu(III) and Fe(II) ions introduced alternately (polyEuFe) was precisely prepared via stepwise complexation of the metal ions to a new unsymmetrical ligand with both a dicarboxylate-substituted terpyridine and an unsubstituted terpyridine. The polymer showed ...

The coordination geometry about the Pd centre in the title compound, [Pd(C(40)H(42)N(5))Cl], is approximately square-planar. The CNC pincer-type N-heterocyclic carbene ligand binds to the Pd atom in a tridentate fashion by the amido N atom and the two carbene atoms and generates two six-membered chelate rings, completing the coordination.

In the title compound, [CdCl(2)(C(11)H(17)N(3))], the Schiff base acts as an N,N',N''-tridentate ligand towards the Cd(II) ion. Two Cl atoms complete a distorted square-pyramidal geometry around the metal atom. In the crystal, a C-H⋯Cl inter-action connects pairs of mol-ecules into centrosymetric dimers.

Zinc(II) and cadmium(II) complexes of a tridentate oximate ligand cleave 4-nitrophenyl acetate with rate constants surpassing by two orders of magnitude those reported as the maximum possible level for highly basic free oximate anions as a result of removal of the "solvational imbalance" of the nucleophile by metal coordination.

A chiral tridentate ketimine P,N,N-ligand has been successfully applied in the copper-catalyzed enantioselective propargylic substitution of propargylic acetates with a variety of β-dicarbonyl compounds, in which excellent enantioselectivities (up to >99% ee) and high yields have been obtained.

In the title complex, [Cu(C(13)H(10)ClN(2)O)Cl], the Cu(II) ion is coordinated by one O atom and two N atoms of the tridentate Schiff base ligand and one chloride ion, forming a slightly distorted square-planar geometry. Weak Cu⋯Cl inter-actions [2.793 (5) Å] result in the formation of a chain along the a axis.

Synthetic routes to four new tridentate ligands with large cavities have been developed. Each ligand features two halides at the termini of the molecules that could be used for further elaboration of the system. Such compounds are ideal for encapsulating organoiodide guests using charge-transfer interactions.

Unsaturated σ,π-cyclooctenyl and hydrido Ir(III) complexes bearing an unusual tridentate dianionic ONO pincer-type ligand have been straightforwardly obtained from 2,6-pyridinedicarboxylic acid and standard Ir(I) starting materials. These complexes efficiently catalyzed the arene C-H borylation under thermal conditions.

The Sn atom of the title compound, [Sn(C(6)H(5))(2)(C(11)H(11)NO(4))], adopts a distorted SnNC(2)O(2) trigonal-bipyramidal geometry with the O atoms in the axial positions. The metal atom forms five- and six-membered chelate rings with the O,N,O'-tridentate ligand.