Pyridyl-based ligands

Another dimer-of-dimers complex, [Mn404(tmdp)2(H20)2] (50), was reported by Uehara and co-workers, where they used a similar polydentate pyridyl-based ligand, tmdp. This... 

Main group pyridyl-based ligands strategies to mixed metal complexes 12CC8617. 

Lautens et al. explored a water-soluble pyridyl phosphine moiety-based ligand for such additions (Scheme 4.7).90 [Rh(COD)Cl]2... 

Pyridine-based ligands which have been used for dendrimers are 2,2-bipyridine (bpy) 17,2,3-bis(2-pyridyl)pyrazine (2,3-dpp) 18 and its monomethylated salt 19, and 2,2 6, 2"-terpyridine 20. Their transition metal complexes possessing dendritic structures were first reported in the collaborative work of Denti, Campagne, and Balzani whose divergent synthetic strategy has led to systems containing 22 ruthenium centers. - The core unit is [Ru(2,3-dpp)3] 21 which contains three... 

The condensation of o-aminobenzenethiol with pyridine-2,6-dicarbaldehyde does not form the corresponding Schiff base but a polyheterocyclic compound which behaves as a tridentate ligand towards nickel(II).2365 In contrast the reaction of 2-(2-pyridyl)benzothiazoline with nickel(II) results in the opening of the heterocyclic ring and in the formation of a Schiff base ligand which coordinates to nickel(II) as a mononegative tridentate ligand.2366,2367... 

While pyridyl-based coordination polymers are extremely synthetically versatile they are not generally particularly thermally robust as a consequence of the tendency of the pyridyl ligands to dissociate or decompose above ca. 250-300 °C. The volatility of the ligands is linked to the fact that they are neutral and hence stable in the free state. Moreover their neutrality means that even in the absence of interpenetration, coordination polymer frameworks are generally filled with counter anions which,... 

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