4-Allylthiosemicarbazide (1), prepared from allyl isothiocyanate and hydrazine, reacted with butane-2, 3-dione, ninhydrin, or glyoxal to give the corresponding bsutane- 2, 3-dione bis-(4- allylthiosemicarbazone) (2), ninhydrin-1, 3-bis(4- allylthiosemicarbazone) (5), or glyoxal bis(4-allylthiosemicarbazone) (6), respectively. Butane-2, 3-dione bis-thiosemicarbazone(3) was obtained via the reaction of butane-2, 3-dione and aminothiourea. Cyclohexanone 4-allylthiosemicarbazone(4) was also prepared in a similar way. The complexation behavior of there compounds with some metal ions under different conditions was briefly investigated.

Key words: SUBSTITUTION DEGREE, THIOSEMICARBAZIDE P, ALLYL GROUP, SYNTHESIS, METAL COMPLEX, STRUCTURE CHARACTERISTICS, SPECTROMETRIC ANALYSIS