Even in the absence of hydrogen bonding functionality, [CpFe(arene)]+ derivatized cyclotriveratrylenes 5 will bind anionic substrates (i.e. [PF6]–, halides) deep within their preorganized molecular cavities. The crystal structure of 5b[PF6]3·(CH3CH2OCH2CH3)1.5·(H2O) demonstrates the [5b⊂(PF6)]2+ complex and solution halide binding is monitored by 1H NMR spectroscopy.
K. Travis Holman, G. William Orr, J. L. Atwood and J. W. Steed, Chem. Commun., 1998, 2109 DOI: 10.1039/A805397I
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