Rational Design of Porous Coordination Polymers Based on Bis(phosphine)MCl₂ Complexes That Exhibit High-Temperature H₂ Sorption and Chemical Reactivity

MCl2 complexes of a new p-carboxylated 1,2-bis­(diphenylphosphino)­benzene ligand are effectively utilized as tetratopic building blocks to prepare isostructural porous coordination polymers with accessible reactive metal sites (M = Pd, Pt). The crystalline materials exhibit unusual and fully reversible H2 sorption at 150 °C. Post-synthetic reactivity is also possible, in which Pt–Cl bonds can be activated to provide organometallic species in the pores.