On the other side of the hull in Figure sits the predicted C2/m phase of K6C6O6 (Figure ). This material is remarkable in terms of the large charges it permits on the relatively small rhodizonate ions. Our estimates of -4.9 (Table ) is close to the formal reduction by six electrons provided by a stochiometric amount of K. We emphasize that such highly charged organic anions are exceedingly rare, even exceeding the alkali metal -4 reduction of corannulene. The (C6O6) rhodizonates in this phase are subtly distorted from planarity: we predict them to be D2 symmetric and feature two different C-C distances (1.443Å and 1.442Å) and a C-C-C-C dihedral angle of 2.32°. Rhodizonates in the C2/m phase arrange in rows with each highly charged anion bridged by two K + cations (Figure ). The different rows of anions are offset relative to each other such that the bridging cations of one row also coordinate exactly in the middle of a neighboring anion. The band gap of this semiconducting phase exceeds 1.5 eV (Figure ). a predicted from the topology of the electron density using the quantum theory of atoms in molecules (QTAIM).