STUDIES ON SOME MIXED-LIGAND CHELATES OF MERCURY-(II) WITH O-ACETO-ACETOTOLUIDIDE O-ACETOACETANISIDIDE AND BIOLOGICALLY-ACTIVE 2-OR 3-PYRAZOLINE-5-ONE DERIVATIVES/

New mixed-ligand chelates of mercury(II) of the composition [Hg(CI) (A -A) (L)], where (A-A)H = o-acetoacetotoluidide (OAATH) or o-acetoaceta nisidide (OAAANH) and L = 3-methyl-pyrazoline-5-one (MP), 3-methyl-1-p henyl-2-pyrazoline-5-one (MPHP), 2,3-dimethyl-4-methyl-aminomethane-su lphonate sodium monohydrate-1-phenyl-3-pyrazoline-5-one (DMMASDHP), or 4-amino-2, 3-dimethyl-1-phenyl-3-pyrazoline-5-one (ADMPHP), have been synthesized and characterised by analytical data, molar conductances, magnetic measurements, TGA and H-1 N.M.R. and I.R. spectral studies. The overall I.R. studies suggest that o-acetoacetotoluidide (OAATH)/o- acetoacetanisidide (OAAANH) behave as monobasic bidentate oxygen donor s and the 2- or 3-pyrazoline-5-one derivatives as monodentate oxygen d onors. A tetrahedral structure has been proposed for these chelates.