SYNTHESIS, MAGNETIC AND SPECTRAL STUDIES OF SOME MIXED-LIGAND CHELATES OF MERCURY(II) WITH ACETOACETANILIDE (O)UNDER-BAR-HYDROXYACETOPHENONE AND 2 3-PYRAZOLINE-5-ONE DERIVATIVES/

Novel mixed-ligand tetra-coordinated chelates of mercury(II) of the co mposition [Hg(Cl)(L-L)(L)], where (L-L)H = acetoacetanilide or o under bar-hydroxyacetophenone and L = 3-methyl-2-pyrazoline-5-one, 3-methyl- 1-phenyl-2-pyrazoline-5-one, 2,3-dimethyl-4-methyl-aminomethanesulphon ate sodium monohydrate-1-phenyl-3-pyrazoline-5-one, 2,3-dimethyl-1-phe nyl-3-pyrazoline-5-one or 3-dimethyl-1-(4'-methylphenyl)-3-pyrazoline- 5-one, have been synthesized and characterized by analytical data, mol ar conductances, magnetic measurements, nuclear magnetic resonance and infrared spectral studies. The overall I. R. studies suggest that ace toacetanilide-o underbar-hydroxyacetophenone behave as a monobasic bid entate oxygen donor and the 2/3-pyrazoline-5-one derivatives as monode ntate 0-donors. A suitable tetrahedral structure has been proposed for the chelates.