The syntheses of 23 new chelating ligands are described. Most of these ligands are derived from the chiral pyrazole (1) which has been linked to a variety of heterocycles , namely pyridine, pyrimidine, pyridazine, isoxazole , benzimidazole, thiophen and furan. In certain cases the parent achiral analogues have also been prepared. Preliminary studies of the coordination chemistry of these ligands with selected transition metals have been carried out. The X-ray crystal structures of palladium complexes of isoxazole- and thiophen-containing ligands have also been determined.

The syntheses of the pyrazolylmethylpyridines (5a-c), their chiral derivatives (7) and (8), and the chiral methylenebisindazoles (9)-(11) are reported. These bidentate ligands form stable 1 : 1 complexes with PdCl2. A single-crystal X-ray structure determination of dichloro [(4S,7R)-7,8,8-trimethyl-2-(pyridin-2-ylmethyl)-4,5,6,7-tetrahydro-4,7-methano-2H-indazole]palladium(II),(16), is also reported.