‘Single molecule magnets’ (abbreviated SMMs) offer intriguing new possibilities for storing and processing data: lanthanoids, due to their large number of unpaired electrons, are attracting a great deal of interest. The triangular complex [Dy₃(OH)₂(o-van)₃(H₂O)₅Cl]³⁺ (25) consists of three Dy³⁺, each coordinated by a molecule of vanillin and interlinked by hydroxide ions. With reference to the article by R. Sessoli and A.K. Powell (Coord. Chem. Rev., 2009, 253, 2328), explain why Dy(III) triangles are particularly interesting to those working in the SMM field.

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CI H 25 Dy