Lanthanide Perchlorate Complexes of 1,4-Bis(Phenylsulfinyl)Butane

Seven trivalent lanthanide perchlorate complexes of the types [Ln(bphsb)4C104](C104)2 (where Ln = La(III), Pr(III), Nd(III) and Eu(III)) and [Ln(bphsb)3C104](C104)2 (where Ln = Ho(III), Er(III) and Lu(III), and bphsb = 1,4-bis(phenylsulfinyl) butane) have been synthesized by the reaction of bphsb with lanthanide (III) perchlorate in methanol-chloroform mixture. The complexes have been characterized by elemental analyses, molar conductance, electronic and infrared spectral techniques. Several bonding parameters have been calculated from the absorption spectra of the Pr(III), Nd(III), Ho(III) and Er(III) complexes. Infrared spectral data suggest that bphsb acts as bidentate ligand coordinating through the oxygen atoms of the S=0 moieties.