Kinetic studies on the reversible ring opening-closure reaction of the triazine ligand and structural properties of palladium(II) complexes

A Pd(II) complex containing didentate triazine ligand L1 (2-(2-methylphenyl)-3-(2-pyridyl)-2,3-dihydronaphtho[2,1-e][1,2,4]triazine) [PdCl2(L1)] (1) was prepared. Complex 1 reacted with methanol in dichloromethane to yield [PdCl(L2)] (2) (L2 = N-[methoxy(2-pyridyl)methyl]-1-(2-methylphenylazo)-2-naphthylamide). The structures of these complexes were determined by X-ray crystallography. A reversible ring opening and closure reaction of the triazine ligand was observed. Equilibria and kinetics of the reaction were investigated.