2-PHENYL- AND 2,2-DIMETHYL-O-ALKYLHYDRAZINECARBOTHIOATES AS NEW COMPLEXING REAGENTS

In this paper synthesis and extraction properties of 2-phenyl- and 2,2-dimethy-О-alkylhydrazinecarbothioates have been described. The compounds obtained are characterized with melting points. Their composition has been supported with IR and 1H NMR spectra. Z, E-isomerism is found to exist in these compounds. It connects with rotation around C−N bond parts of molecule. Extraction properties of these compounds have been studied with О-buthylhydrazinecarbothioate derivatives. Ions of nonferrous (Cu(II), Ni(II), Co(II), rare (Re(VII) and noble (Pd(II), Pt(IV), Ag(I)) metals were chosen. Both reagents were established to demonstrate extraction properties towards these metals. Reagent with phenylic radical does not extract Ni(II) and Co(II) till рН 5. Extraction degree of these metals in the range of рН 8-10 achieves 95-98%. Ions of Cu(II) begin to be extracted in slightly more acidic solutions and in the range of рН 5-12 reagent extracts 94-99% of Cu(II). 2,2-dimethylderivative starts to reсover nonferrous metals from more acidic solutions. In the range of рН 3-12 it extracts 98-99.5% of Cu(II). In the range of рН 2-10,5 extraction degree of Re(VII) equals 85-90%. 2-phenyliderivative extracts 94-99% of Pd(II) in the range of СHCl = 6 моль/л – рН 4, whereas its extraction degree with 2,2-dimethylderivative achieves 95-99% only in the range of рН 1-4. 2-phenylicderivative extracts 85-90% of Pt(IV) from subacidic media. With an increase in acid concentration extraction degree of Pt(IV) is decreased. 2,2-dimethylderivative extracts 20-30% of Pt(IV) in the all acidity range under investigation. Both reagents extract 80-85% of Ag(I) in the very narrow range of HCl concentration. For citation: Gusev V.Yu., Batueva T.D. 2-phenyl- and 2,2-dimethyl-O-alkylhydrazinecarbothioates as new complexing reagents. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2025. V. 68. N 1. P. 23-30. DOI: 10.6060/ivkkt.20256801.7114.