1-Isonicotinoyl-2-furfurylidene Hydrazine-Cu(II) 착화합물에 관한 분석화학적연구

Studies on 1-Isonicotinoyl-2-furfurylidene hydrazine-Cu(II) Complex Compound.

A new organic reagent, 1-isonicotinoyl-2-furfurylidene hydrazine was synthesized from isonicotinic acid hydrazide and furfural, gives precipitate with copper(II), mercury(II) and argent(I), whereas, it gives a water soluble yellow complex with iron(III). Copper complex of the reagent is soluble in EtOH, MtOH, pyridine, dioxane and dimethylformamide with green yellow coloration. The complex has a maximum absorption at 385mmc and molar ratio of copper: reagent was estimated as 1 : 1 by continuous variation method, slop method and chelate titration method. Molar extinction coefficient (9600) and apparent formation constant of this complex was spectrophotometrically determined. K=1.7 X 107 (Babko''s method) K=2.1 X 107 (Anderson''s method). This reagent reacted with copper so sensitive that it would be available for determination of Cu (II).