engleski

Adamantane as a building block in the construction of crown ethers and cryptands: synthesis, structure and properties

Several new adamantane- and oxaadamantane-containing crown ethers and cryptands have been synthesized, and their ability to complex metal cations has been studied. In molecules of this type, the adamantane moiety functions as a rigid spacer that lowers the conformational mobility of the host molecule and also affects the size and shape of the host cavity relative to the corresponding parent non-substituted system. The results of the extraction experiments combined with the molecular modeling studies of the corresponding K+complexes showed, that preorganization in given host-molecules exerts a dramatic influence upon that molecule's ability to interact effectively with guest metal ions to form corresponding host-guest complex.

Adamantane-crown ethers; oxaadamantane-crown ethers; extraction experiments; cation complexation; cation transport

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