Abstract Rigid trigonal tris (3-pyridylduryl) borane L was synthesized through four steps in good overall yield from readily available 1, 2, 4, 5-tetramethylbenzene and was used to construct two porous cadmium (II) complexes Cd (L) X 2· G (X= Cl, Br; G= guset molecules), 1 (Cd (L) Cl 2· EtOH· i PrOH· 3H 2 O) and 2 (Cd (L) Br 2· MeOH· C 7 H 8· 3H 2 O), under mild reaction conditions. 1 and 2 are isostructural and featured with 3D porous metal- ...