Abstract
The first adamantyl platinum complexes were isolated and characterized, namely [(COD)Pt(2‐Ad)Cl], [(dppe)Pt(2‐Ad)Cl], [(COD)Pt(2‐Ad)Me] and, [(dppe)Pt(2‐Ad)Me] {COD = 1,5‐ cyclooctadiene, dppe = 1,2‐bis(diphenylphosphino)ethane, Ad = adamantyl}. These complexes show considerable stability, including resistance to heating to 125° C in solution for several days. It is therefore concluded that previously existing road blocks to synthesizing platinum adamantyls were due to complications in the transmetallation step, and not due to intrinsic instability of the final product. Counterintuitively, the key to successful transmetallation from ZnII onto PtII is imposing slow reaction progress via use of a solvent in which both the platinum chloride precursor and adamantyl anion precursor are poorly soluble.
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