title: Solvent extraction studies on the mixed ligand complexes of lanthanides with antipyrine and perchlorate.
abstract: Lanthanide ions are found to form colourless mixed-ligand complexes with antipyrine in presence of perchlorate at pH 4.0, and these are quantitatively extractable into nitrobenzene. The composition of the extracted species is shown to be metal:antipyrine:perchlorate = 1:6:3. The variation of the extraction constants with atomic number of the lanthanides is attributed to the "tetrad effect".
authors.affiliation: Department of Chemistry, Andhra University, Waltair, India.
authors.forename: M V
authors.initials: MV
authors.lastname: Murthy
authors.forename: D
authors.initials: D
authors.lastname: Satyanarayana