Experimental Synthesis of M6L4 Cage

The authors would like to express sincere thanks to many co-workers who, with their efforts and creative minds, have significantly contributed to the development of the chemistry discussed in this article. Their names are found in many of the following references. 

18 Gokel, G.W. (1991) Crown Ethers and Cryptands, Royal Society of Chemistry, Cambridge. 

19 Szejtli, J. (1988) Cyclodextrin Technology, Kluwer Academic Publishers, Dordrecht. 

21 Asfari, Z. Bohmer, V. Harrowfield, J. Vicens, J. and Saadiouli, M. (eds) (2001) Calixarenes, Kluwer Academic Publishers, Dordrecht. 

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