Through-space interaction of sulphur in lanthanide(III) complexes of (phenylthio)acetic acid

The (phenylthio)acetates of lanthanum(III), praseodymium(III), neodymium(II I), samarium(III), gadolinium(III), terbium(III) and dysprosium(III) have b een synthesized and characterized by elemental analysis, spectroscopic, mag netic and thermal data. The IR data show that the carboxylato group is bond ed to the metal ion in a bidentate chelate mode. A coordination number of s even is suggested for the rare earth metal ions in these complexes. Through -space interaction of sulphur has been suggested for the low M-L covalency in these complexes.