Magnetic interactions through fluoride: magnetic and spectroscopic characterization of discrete, linearly bridged [MnIII2(μ-F)F4(Me3tacn)2(PF6)

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  • Kasper Steen Pedersen
  • Marc Sigrist
  • Weihe, Høgni
  • Andrew Bond
  • Christian Aagaard Thuesen
  • Kim P. Simonsen
  • Torben Birk
  • Hannu Mutka
  • Anne-Laure Barra
  • Bendix, Jesper

The nature of the magnetic interaction through fluoride in a simple, dinuclear manganese(III) complex (1), bridged by a single fluoride ion in a perfectly linear fashion, is established by experiment and density functional theory. The magnitude of the antiferromagnetic exchange interaction and the manganese(III) zero-field-splitting parameters are unambiguously determined by inelastic neutron scattering to yield J = 33.0(2) cm(-1) (Ĥ = JŜ1·Ŝ2 Hamiltonian definition) and single-ion D = -4.0(1) cm(-1). Additionally, high-field, high-frequency electron paramagnetic resonance and magnetic measurements support the parameter values and resolve |E| ≈ 0.04 cm(-1). The exchange coupling constant (J) is 1 order of magnitude smaller than that found in comparable systems with linear oxide bridging but comparable to typical magnitudes through cyanide, thus underlining the potential of fluoride complexes as promising building blocks for novel magnetic systems.

TidsskriftInorganic Chemistry
Udgave nummer10
Sider (fra-til)5013-5019
Antal sider7
StatusUdgivet - 2014

ID: 120580044