Highly stable complexes of Schiff bases and chromium(II), palladium(II), or platinum(II) have now been synthesized. Such a complex is the Cr2+ compound (2a). It can form addition compounds with molecules such as CH3OH, pyridine, or cyclohexane. Complexes of type (2) containing Pd2+ or Pt2+ and R = e.g.(CH2)x, x = 2–8, 10, 12 are accessible from (1) and K2PdCl4 or K2PtCl4 in DMF/NaOAc. They can also intercalate organic molecules.