title: Magnetic interactions through fluoride: magnetic and spectroscopic characterization of discrete, linearly bridged [Mn(III)2(μ-F)F4(Me3tacn)2](PF6).
abstract: 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.
authors.affiliation: Department of Chemistry, University of Copenhagen , Universitetsparken 5, DK-2100 Copenhagen, Denmark.
authors.forename: Kasper S
authors.initials: KS
authors.lastname: Pedersen
authors.forename: Marc
authors.initials: M
authors.lastname: Sigrist
authors.forename: Høgni
authors.initials: H
authors.lastname: Weihe
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Bond
authors.forename: Christian Aa
authors.initials: CA
authors.lastname: Thuesen
authors.forename: Kim P
authors.initials: KP
authors.lastname: Simonsen
authors.forename: Torben
authors.initials: T
authors.lastname: Birk
authors.forename: Hannu
authors.initials: H
authors.lastname: Mutka
authors.forename: Anne-Laure
authors.initials: AL
authors.lastname: Barra
authors.forename: Jesper
authors.initials: J
authors.lastname: Bendix