BETA-DIKETONE COMPLEXES OF MANGANESE(II), COBALT(II), NICKEL(II) AND PALLADIUM(II)

The reactions of manganese(II), cobalt(II) and nickel(II) acetates (1 mole) with antipyrine-4-azo-beta-ethylcyanoacetate (HL(1)) and antipyr ine-4-azo-beta-acetylacetone (HL(2)) (1 mole) produce complexes of the M(L)(2) type. K2PdCl4 (1 mole) reacts with HL(1) and HL(2) (1 mole) t o yield complexes of the general formula PdLCl, the ligands behaving a s monobasic tridentates. The electronic spectral and magnetic data sho w the complexes to be high-spin octahedral, whereas the palladium(II) complexes are diamagnetic square planar. The complexes were characteri zed by elemental analyses, conductance measurements and i.r. and elect ronic spectra as well as magnetic susceptibility measurements and ther mal (t.g.a. and d.t.a.) analysis.