Carcerand
2126.jpg")
![Synthesis of a carcerand from two calixarenes.](/Images/godic/202501/03/Synthesis_of_a_Carcerand_Cartoon2126.jpg")
A carcerand is a host molecule that completely entraps its guest so that it will not escape even at high temperatures. This type of molecule was first described by Donald J. Cram in 1985 and is derived from the Latin carcer, or prison. The complexes formed by a carcerand with permanently imprisoned guests are called carceplexes.