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New crystalline complexes of hexapodal pyrazole-based hosts with NH4+PF6−and/or solvent molecules were obtained and detailed analysed. The binding motifs observed between the binding partners give valuable insights into the phenomena of molecular recognition processes. Analyses of the conformations of the hexasubstituted benzene derivatives have shown that both ababab as well as abbabb and aaabbb...
A series of calix[4]arenes bearing various substituents including alkyl, p-bromobenzyl, carboxy and allyl at opposite methylene bridges has been synthesized via successive metallation followed by nucleophilic substitution. In a first step, mono-lithiated calix[4]arenes react with terminal bromoalkanes to give 2-alkylated calix[4]arenes or with CO 2 the respective calixarene-2-carboxylic acid...
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