Synthesis and Characterization of Some 4f-Metal Ion Complexes of 4[N-(3´ -Nitrobenzalidene)Amino] Antipyrine Thiosemicarbazone

Abstract

Some 4f-block metal ion coordination compounds of 4[N-(3'nitrobenzalidene)
aminol antipyrine thiosemicarbazone (3'-NO₂BAAPTS)
with the general composition [Ln(3'-NO₂BAAPTS)₂](ClO₄)₃ (Ln = La, Pr,
Nd, Sm, Gd, Th, Dy or Ho) have been synthesized. The conductance values
of these metal coordination compounds in nitrobenzene suggest that the
compounds are ionic in nature and all the three perchlorato ions are present
outside the coordination sphere. Magnetic, spectral and thermal properties
of the compounds have also been investigated. The infrared studies reveal
that 3'-NO₂ BAAPTS acts as neutral tridentate (N,N,S) ligand. The coordination
number of central metal ion is six in all these compounds.