title: High nuclearity manganese(III) compounds containing phenol-pyrazole ligands: the influence of the ligand on the core geometry.
abstract: Three high-nuclearity manganese(III) clusters have been synthesized and characterized: [Mn₈(μ₄-O)₄(phpzH)₈(thf)₄] (1), [Mn₈(μ₄-O)₄(phpzH)₄(EtOH)₄]·2EtOH (2), and [Mn₆(μ₃-O)₄(μ₃-Br)₂(HphpzEt)₆(phpzEt)] (3). Compounds 1 and 2 contain a [Mn₈(μ₄-O₄)(phpzH)₈] core in which antiferromagnetic interactions between the manganese(III) ions are found. Compound 3 is a hexanuclear manganese(III) cluster in which weak ferromagnetic interactions appear to be operative. The formation and the stability of the cluster cores in relation to the type of phenol-pyrazole ligand and the reaction conditions are discussed.
authors.affiliation: Gorlaeus Laboratories, Leiden Institute of Chemistry, Leiden University, P. O. Box 9502, 2300, RA, Leiden, The Netherlands.
authors.forename: Marta
authors.initials: M
authors.lastname: Viciano-Chumillas
authors.forename: Graham
authors.initials: G
authors.lastname: de Ruiter
authors.forename: Stefania
authors.initials: S
authors.lastname: Tanase
authors.forename: Jan M M
authors.initials: JM
authors.lastname: Smits
authors.forename: René
authors.initials: R
authors.lastname: de Gelder
authors.forename: Ilpo
authors.initials: I
authors.lastname: Mutikainen
authors.forename: Urho
authors.initials: U
authors.lastname: Turpeinen
authors.forename: L Jos
authors.initials: LJ
authors.lastname: de Jongh
authors.forename: Jan
authors.initials: J
authors.lastname: Reedijk
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry; D018360:Crystallography, X-Ray; D008024:Ligands; D008280:Magnetics; D008345:Manganese / Q000737:chemistry*; D008968:Molecular Conformation; D010636:Phenols / Q000737:chemistry*; D011720:Pyrazoles / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D008024:Ligands; D010636:Phenols; D011720:Pyrazoles; C031280:pyrazole; D008345:Manganese