Studies on co-ordination compounds of silver(II). Part I. Magnetic and spectral properties of complexes with pyridine carboxylic acids

Abstract

The magnetic susceptibility of seven pyridine carboxylic acid complexes of silver(II) have been measured over the temperature range 300–80°K. All the complexes show Curie or Curie–Weiss behaviour but silver(II) nicotinate (θ= 52°) is believed to be antiferromagnetic. I.r. and electronic spectronic spectral data are also reported and correlated with the structures of the complexes. Silver(II) dipicolinate tetrahydrate (dipicolinic acid = pyridine-2,6-dicarboxylic acid) probably has a pseudo-tetrahedral configuration. The spectral and magnetic properties of related copper(II) and silver(II) complexes with pyridine monocarboxylic acids are compared.