Fig. 2
From: Mixed valence salts based on carbon-centered neutral radical crystals

1D π-stacked radical polymers of TOT. a (t-Bu)3TOT, b (n-BuO)3TOT, c F3TOT, d Br3TOT. Labels s1 and s2 are the intradimer and interdimer overlap integrals, respectively. In a and b, the butyl groups are omitted for clarity