Reversible Encapsulation of Xenon and CH ₂ Cl ₂ in a Solid‐State Molecular Organometallic Framework (Guest@SMOM)

Reversible encapsulation of CH 2 Cl 2 or Xe in a non‐porous solid‐state molecular organometallic framework of [Rh(Cy 2 PCH 2 PCy 2 )(NBD)][BAr F 4 ] occurs in single‐crystal to single‐crystal transformations. These processes are probed by solid‐state NMR spectroscopy, including 129 Xe SSNMR. Non‐covalent interactions with the ‐CF 3 groups, and hydrophobic channels formed, of [BAr F 4 ] − anions are shown to be important, and thus have similarity to the transport of substrates and products to and from the active site in metalloenzymes.