Figure explains how the e1g SOMO of (C6O6) shown in Figure can spread into highly dispersed π-bands along the stackingdirection of the rhodizonates, and how the partial occupation of these bands renders them exclusively bonding. Our band structure calculation (Figure ) shows that these two frontier π-bands are not always degenerate across the Brillouin zone, but that they are on average one quarter occupied, reflecting the (e1g) 1 configuration of the (C6O6) 3-rhodizonates SOMO. Density of state (DOS) calculations show K3C6O6 to be distinctly metallic (Figure ). And as expected, the DOS near the Fermi level share a distinct similarity to that we expect from a onedimensional system. This electronic structure give rise to clear Van Hove singularities at the band edges at 𝛤, A, L, M, H and K, which explain the sizable DOS just below the Fermi level, and the inherent metallicity of the material. Figure provides an example of how weaker bonding interactions orthogonal to the stacking direction can give rise to flatter band regions. A Crystal Orbital Hamilton Population (COHP) analysis shown in Figure also confirms that the interactions between stacked anions are indeed exclusively, and substantially, bonding. Using COHP, we can estimate the bonding interaction between neighboring anions in K3C6O6 to -0.44 eV (-10.2 kcal mol -1 ). The type of bonding we describe in Figures is a kind of inter-molecular multi-center bonding but infinitely extended along the face-to-face stacking direction of rhodizonates anions. The closest molecular analogy to this kind of extended interaction is the sharing of electrons between face-to-face stacked planar radicals, often referred to as pancake bonds. Pancake bonds are distinct from van der Waals interactions and π-stacking both in terms of structure and bond strength. These kinds of spin-pairing interactions are covalent in nature, and are formed between planar radicals with a ring-to-ring dissmaller than the sum of van der Waals radii of neighboring atoms. Our COHP estimate of the inter-rhodizonate interaction energy (Figure ) is, possible fortuitously, in good agreement with expectations for strong pancake bonded dimers, which range from -0.52 to 0.78 eV (-12 to -18 kcal mol -1 ). The rhodizonates we study also orient close to the shortest molecular pancake bonds, ca. 2.93 Å.