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Exhaustively Methylated Azacalix[4]arene:  Preparation, Conformation, and Crystal Structure with Exclusively CH/π-Controlled Crystal Architecture

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posted on 26.05.2005, 00:00 by Hirohito Tsue, Koichi Ishibashi, Hiroki Takahashi, Rui Tamura
Described are the preparation, conformation, and crystal structure of exhaustively methylated azacalix[4]arene involving nitrogen atoms as bridging units. NMR and X-ray crystallographic analysis have demonstrated that this novel azacalix[4]arene adopts a 1,3-alternate conformation both in solution and in the solid state. The crystal structure has been characterized solely by intermolecular CH/π interactions, by which the azacalix[4]arenes mutually interact with each other outside the cavity to furnish a two-dimensional network structure.

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