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

Abstract

M ößbauer Emission, M etal-Nucleotide Complexes, Electronic Structure M ößbauer 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 environ ment. The susceptibility data are indicative of short antiferromagnetic ordering in the majority of the samples. For the hydrated Co-5'UM P (5'-uridine-monophosphate) and Co-5'CM P (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.