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a) Structure of [Br20]2− in [C4Mpyr]2[Br20]. Cations are omitted for clarity. Reproduced with permission. [158] Copyright 2011 Wiley‐VCH. b) Structure of the highest known polybromide anion [Br24]2− in [P4444]2[Br24]. Cations are omitted for clarity. Reproduced with permission.[ 159 , 160 ] Copyright 2015 and 2020 Wiley‐VCH.
