LANTHANIDE PERCHLORATE COMPLEXES OF 1,4-BIS(PHENYLSULFINYL)BUTANE

Seven trivalent lanthanide perchlorate complexes of the types [Ln(bpha b)(4)ClO4] (ClO4)2 (where La = La(III), Pr(III), Nd(III) and Eu(III)) and [Ln(bphab)(3)ClO4] (ClO4)(2) (where Ln = Ho(III), Er(III) and Lu(I II), and bphab = 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 techniq ues. Several bonding parameters have been calculated from the absorpti on spectra of the Pr(III), Nd(III), Ho(III) and Er(III) complexes. Inf rared spectral data suggest that bphsb acts as bidentate ligand coordi nating through the oxygen atoms of the S=O moieties.