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arXiv · 1211.6288

Exchange Interactions in a Dinuclear Manganese (II) Complex with Cyanopyridine-N-oxide Bridging Ligands

A. S. Markosyan·I. Yu. Gaidukova·A. V. Ruchkin·A. O. Anokhin·V. Yu. Irkhin·M. V. Ryazanov·N. P. Kuz'mina·V. N. Nikiforov
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Abstract

The structure and magnetic properties of oligonuclear manganese complex [Mn(hfa)2cpo]2 (where hfa is hexafluoroacetylacetonate dehydrate and cpo is 4-cyanopyridine-N-oxide) are presented. In the unit cell, the dinuclear molecules are well isolated from each other. The non-monotonous dependence of magnetic susceptibility is explained in terms of the hierarchy of exchange parameters by using exact diagonalization. The thermodynamic behavior of pure cpo and [Mn(hfa)2(cpo)]2 is simulated numerically in a dimer approximation by an extrapolation to spin S = 5/2. The Mn-Mn exchange integral is evaluated.

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A. S. Markosyan, I. Yu. Gaidukova, A. V. Ruchkin, A. O. Anokhin, V. Yu. Irkhin, M. V. Ryazanov, N. P. Kuz'mina, V. N. Nikiforov. 2013-12-04. Exchange Interactions in a Dinuclear Manganese (II) Complex with Cyanopyridine-N-oxide Bridging Ligands. https://doi.org/10.1016/j.physb.2013.09.025

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