Metallo-supramolecular assembly of protic pincer-type complexes: encapsulation of dinitrogen and carbon disulfide into a multiproton-responsive diruthenium cage.

Partial dehydrobromination of a diprotic pincer-type ruthenium complex in the presence of a rigid 1,3-bis(diphenylphosphino)benzene linker provided a dinuclear cage containing a guest template KBr surrounded by hydrogen bonds and electrostatic interactions. Dinitrogen and carbon disulfide were encapsulated into the cage with proton channels formed by the pyrazole arms in the pincer ligands.