THE EFFECT OF 4-ACYL SUBSTITUENTS ON THE INFRARED STRETCHING FREQUENCIES OF SOME 1-PHENYL -3- METHYL -4- ACYLPYRAZOL -5-ONES AND THEIR MAGNESIUM (II) ,COBALT(II) COPPER (II) AND ZINC (II) CHELATES
ABSTRACT The divalent metal chelates of Mg,Co,Cu and Zn with 4-acetyl (hpmap), 4- benzoyl(hpmbp),4-butyryl(hpmbup),4-capyroyl(hpmcp),4-propiony (hpmprp) and 4-palmitoyl(hpmpp) derivatives of 1-phenyl -3-methyl pyrazol-5-one have been synthesized and characterized by UV ,IR, and conductivity measurements. It is shown that the ligands behaved like bidentate enols, all forming neutral chelates with the metal ions , bonding through oxygen of the enolic hydroxyl group and /or the oxygen atom of the carbonyl group of ...
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