bis-(phosphine sulfide) (4) have been synthesized. A single crystal X-ray diffraction study was carried out for bis(phosphine oxide) 3, which revealed a pinched cone conformation for the calixarene core. In the solid state, each calixarene is linked to two other calixarenes via hydrogen bonds involving the phosphoryl groups as well as two of the four hydroxyl groups, thereby generating a supramolecular polymeric