title: An infinite chainmail of M6L6 metallacycles featuring multiple Borromean links.
abstract: Borromean rings or links are topologically complex assemblies of three entangled rings where no two rings are interlinked in a chain-like catenane, yet the three rings cannot be separated. We report here a metallacycle complex whose crystalline network forms the first example of a new class of entanglement. The complex is formed from the self-assembly of CuBr2 with the cyclotriveratrylene-scaffold ligand (±)-tris(iso-nicotinoyl)cyclotriguaiacylene. Individual metallacycles are interwoven into a two-dimensional chainmail network where each metallacycle exhibits multiple Borromean-ring-like associations with its neighbours. This only occurs in the solid state, and also represents the first example of a crystalline infinite chainmail two-dimensional network. Crystals of the complex were twinned and have an unusual hollow tubular morphology that is likely to result from a localized dissolution-recrystallization process.
authors.affiliation: School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.
authors.forename: Flora L
authors.initials: FL
authors.lastname: Thorp-Greenwood
authors.affiliation: School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.
authors.forename: Alexander N
authors.initials: AN
authors.lastname: Kulak
authors.affiliation: School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.
authors.forename: Michaele J
authors.initials: MJ
authors.lastname: Hardie