As shown in Figure , the dimers exhibit a wide range of magnetic couplings, spanning from -0.05 meV to -128 meV. This diversity of spin interactions can provide a valuable toolkit for designing novel metal-free magnetic materials and offers fundamental insights into the magnetic behavior of 1D and 2D polymers. It is worth noting that the value of J for TRI-TRI as a distorted free molecule is -7.7 meV, whereas it is -16 meV for the planar configuration (Table ). This is in agreement with the previously reported experimental observation of -14 meV for the triangulene dimer on the Au(111) surface. TRI-Ph-TRI also has an experimentally known singlet-triplet energy gap of 2 meV, which matches our calculation (Table ). Among these molecules, TAM-TAM shows a remarkably strong magnetic interaction of -128 meV, which is more than 10 times larger than that in TRI-TRI, indicating a robust anti-parallel spin ordering at high temperatures, but also other dimers show strong couplings. For example, TOT-TOT, TOT-CC-TOT and PLY-PLY have J values of -60, -55, and -22 meV, respectively, and exceed the Landauer limit of minimum energy dissipation of 18 meV. This makes them potential candidates for spin logic operations at ambient temperature (Table and Figure ).