Abstract
Abstract Pt(II) complexes containing tridentate hydrazone ligands were prepared. Reversible protonation and deprotonation of the hydrazone complexes occurred in solution and in the solid state. On grinding and heating the yellow-colored crystals of the protonated complex [PtCl(HL)]Cl, the deprotonated red-colored product, [PtCl(L)], was produced, and HCl vapor was released. The deprotonated complex reverted to the yellow-colored protonated complex on exposure of the red-colored crystals to HCl vapor. Both [PtCl(HL)]Cl and [PtCl(L)] exhibited different luminescence colors in acetonitrile solution.
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