Electronic Structure Determination of Co(II)-Nucleotide Complexes by Using Magnetic and Mößbauer Emission Measurements

A. Caubet 1 , V. Moreno 1 , A. Labarta 2  and J. Tejada 2
  • 1 Departament de Química Inorgànica, Facultat de Química, Universitat de Barcelona, Diagonal 647; Barcelona 08028, Spain
  • 2 Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, Diagonal 647; 08028 Barcelona, Spain

Mößbauer emission spectroscopic and susceptibility measurements of several Co(II)-nucleotide complexes have been carried out. The electronic structure derived from these data for the Co(II) central cation has been related to the distortion and the symmetry of its environment. The susceptibility data are indicative of short antiferromagnetic ordering in the majority of the samples. For the hydrated Co-5′UMP (5′-uridine monophosphate) and Co-5′CMP (5′-cytidine-monophosphate) complexes, magnetic models involving Co(II) dimers and linear chains, respectively, are proposed to explain the susceptibility data observed below 50 K.

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Zeitschrift für Naturforschung B is an international scientific journal which publishes original papers, microreviews, and letters from all areas of inorganic chemistry, solid state chemistry, coordination chemistry, molecular chemistry, and organic chemistry.