Abstract
AbstractThe cover picture shows the structures of the empty dimethoxy‐substituted clip and the host−guest complex between the hydroquinone clip and 1,2,4,5‐tetracyanobenzene (TCNB) calculated by force field. The calculations are in good agreement with single‐crystal structure analyses. The compression of the naphthalene sidewalls of the clip by 2.2 A? during the complexation, which is necessary to obtain binding arene−arene interactions in the complex, is calculated to be a low‐energy process. The complementary nature of the electrostatic potential surface (EPS) of the tetramethylene‐bridged naphthalene tweezer and TCNB (calculated by AM1) explains the high selectivity of this class of receptors toward electron‐deficient substrates. Details are discussed in the article by F.‐G. Klärner et al. on p. 1405 ff. Cover art by Björn Kahlert.
Published Version
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