Studies on metal carboxylates. Part III. Pyridine-2,6-dicarboxylates of the lanthanides. Synthesis and spectral studies and the X-ray photoelectron spectra of several pyridine carboxylate complexes
- 1 January 1973
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 2,p. 200-204
- https://doi.org/10.1039/dt9730000200
Abstract
The lanthanide(III) acetates react with aqueous solutions of pyridine-2,6-dicarboxylic acid (dipicolinic acid, dpcH2) to afford two series of complexes, Ln(dpc)(dpcH),6H2O (Ln = La, Ce, Pr, Nd, Sm, Gd, and Tb) and Ln(dpcH)3,H2O (Ln = Sm, Gd, Tb, Dy, Ho, or Yb). The samarium complex Sm(dpc)(dpcH),6H2O was isolated in α- and β-forms. X-Ray powder data show that within each series the complexes are isostructural. The electronic absorption spectra of the complexes have also been recorded. The X-ray photoelectron spectra of the dehydrated species Ln(dpc)(dpcH)(Ln = Ce or Pr) and Dy(dpcH)3 have been investigated and the C(1s), N(1s), and O(1s) binding energies measured. Attempts to determine the Ce, Pr, and Dy 4s binding energies were unsuccessful. Related measurements of the C(1s), N(1s), and O(1s) binding energies of several pyridine carboxylates of manganese(II), cobalt(II), nickel(II), and silver(II) are also described.Keywords
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