title: Spirobis(pentagerma[1.1.1]propellane): a stable tetraradicaloid.
abstract: In this contribution, we report a spirobis(pentagerma[1.1.1]propellane) derivative as a novel type of molecular architecture in cluster chemistry that features two spiro-fused [1.1.1]propellane units and represents a stable tetraradicaloid species. The crucial issue of the nature of the interaction between the germanium bridgeheads was probed computationally, revealing weak bonding interactions between the formally unpaired electrons.
authors.affiliation: Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Ito
authors.forename: Vladimir Ya
authors.initials: VY
authors.lastname: Lee
authors.forename: Heinz
authors.initials: H
authors.lastname: Gornitzka
authors.forename: Catharina
authors.initials: C
authors.lastname: Goedecke
authors.forename: Gernot
authors.initials: G
authors.lastname: Frenking
authors.forename: Akira
authors.initials: A
authors.lastname: Sekiguchi
mesh_terms: D001952:Bridged-Ring Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry; D005857:Germanium; D015394:Molecular Structure; D017646:Organosilicon Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D013141:Spiro Compounds / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D001952:Bridged-Ring Compounds; D005609:Free Radicals; D017646:Organosilicon Compounds; D013141:Spiro Compounds; D005857:Germanium