The extraction of UO₂²⁺ from nitrate and thiocyanate media at pH 2.0 has been carried out using N,N-methylbutyldecanamide(MBDA),N,N-dibutyldecanamide (DBDA), and N,N-dihexylde-canamide (DHDA) in dodecane, chlorobenzene,o-dichloroben-zene, and xylene. Thermodynamic parameters for the extraction of UO₂²⁺ in the system NO₃^—SCN^–DHDA in dodecane have been calculated from the temperature dependence of the log Kexvalues. UO₂²⁺–SCN–amide complexes have been synthesized,characterized, and compared with the species extracted in the organic phase from such systems.