“…The lack of signals for B and Cl can be attributed to the small elemental concentration of both elements (~1 atomic %) and the large surface area per molecule leading to a small surface density of BCl moieties in a monolayer. A loss of the axial Cl ligand upon adsorption on gold is highly unlikely, since such a process has never been observed for Cl [8a,8b,8d,11] or other, more extended ligands. [4,9,12] Thirdly, the SAM contains small amounts of oxygen.…”