Canadian Journal of Chemistry p. 1785 - 1788 (1994)
Update date:2022-08-29
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Kubaisi
Ismail
Dehydroacetic acid Schiff bases DAE (1) and DATS (2) were isolated from the reaction of dehydroacetic acid (2-acetyl-5-hydroxy-3-oxo-4-hexenoic acid-δ-lactone) with hydrazine-S-methylcarbodithioate and the corresponding acid amide, thiosemicarbazide, respectively. Reaction of such Schiff bases with nickel(II) and palladium(II) ions afforded the dimeric monoligand chelates [M(DAE-2H)]2 and [M(DATS-2H)]2; M = Ni(II) or Pd(II). In the presence of monodentate Lewis bases, B, square-planar chelates [M(DAE-2H)B] and [M(DATS-2H)B], in which B = pyridine or triphenylphosphine, were isolated. The stoichiometry and structure of the isolated organic ligands and their chelates were confirmed through elemental analyses, molecular weight determination, and infrared, ultraviolet-visible, and 1H and 13C nuclear magnetic resonance spectroscopy.
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