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

TL;DR

This paper investigates the structure and magnetic properties of a dinuclear manganese complex with cyanopyridine-N-oxide bridging ligands, revealing exchange interactions and magnetic behavior through experimental and numerical analysis.

Contribution

It provides detailed structural and magnetic analysis of a new manganese complex, including evaluation of exchange interactions using exact diagonalization and numerical simulations.

Findings

Non-monotonous magnetic susceptibility dependence explained by exchange hierarchy

Mn-Mn exchange integral quantified

Thermodynamic behavior simulated for different spin states

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.