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Calculated minimum energy adsorption configuration of borazines 2 (a) and 1 (b) on a Cu(111) surface. The steric hindrance between the Ph and Mes substituents results in the effective decoupling of the central borazine core from the surface for both molecules, whereas only the peripheral Ph rings of the phenylethynyl protrusions in borazine 1 experience a strong interaction with the metal surface.
