The Biicosahedral Complex Anions [M(B11H11)2]3− (M = Cu, Ag, Au): Synthesis and Unexpected Low‐Temperature Phase Transition of [Ag(η5‐B11H11)2]3− to [Ag(η2‐B11H11)2]3− - Bernhardt, Eduard; Knuplez, Tanja; Preitschopf, Tobias; Drichel, Andreas; Beele, Björn; Maximenko, Alexey; Finze, Maik; Slabon, Adam (Angewandte Chemie International Edition, 2026)