In this context, palladium complexes bearing polydentate
phosphine ligands, of the type [[Pd(triphosphine)(solvent)].sup.2+], represent the most extensively studied catalysts for the electrocatalytic C[O.sub.2] reduction.
Waldron, "Conformational analysis and synthetic approaches to polydentate
perhydro-diazepine ligands for the complexation of gallium(iii)," Organic & Biomolecular Chemistry, vol.
This class of compounds is usually used as polydentate
chelating agents that can form a variety of complexes with a range of transition and inner transition metals which have attracted the attention of many researchers [8, 9].
Benoist, Efficient and Tunable Synthesis of New Polydentate
Bifunctional Chelating Agents Using Click Chemistry, J.
Schiff bases derived from salicylaldehyde (salens) as polydentate
ligands are well known to form very stable complexes with transition metal ions .
Due to the stronger bonds between citrate ligands and Fe(III) atoms, polydentate
citrate ligands encapsulated the Fe(III) ions, thereby preventing agglomeration of iron species during calcination.
Lactic, mallic, fumaric, and citric acids can act as polydentate
organic ligands (chelators), because these acids contain carboxylic functional groups.
This versatility has made hydrazones good polydentate
chelating agents that can form a variety of complexes with various transition and inner transition metals and have attracted the attention of many researchers.
Schiff Bases as Acyclic Polydentate
Ligands in Comprehensive Coordination Chemistry; ed.
(8.) Kaan Emregul, C, Duzgun, E, Atakol, O, "The Application of some Polydentate
Schiff Base Compounds Containing Aminic Nitrogens as Corrosion Inhibitors for Mild Steel in Acidic Media." Corros.
ligands are chelators and may act to solubilize transition metals.
Schiff bases with phenolic OH or nitrogen or sulphur of the ring, suitably near to the imino nitrogen may stabilize the metal-nitrogen bond through the formation of chelate rings [6a].