Competing ferro- and antiferromagnetic interactions in a hexagonal bipyramidal nickel thiolate cluster†
Abstract
A new hexagonal bipyramidal Ni8 cluster is reported and its magnetic behaviour is analyzed. The molecular structure consists of a hexagonal wheel capped by two additional apical Ni2+ ions. This structure supports ferromagnetic superexchange interactions between adjacent Ni2+ ions in the wheel and an antiferromagnetic superexchange interaction between the wheel and apical Ni2+ ions.