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Ein supramolekulares Ankermotiv aus Dodecaborat‐Dianionen (B12X122−; X=H, Cl, Br, I) besteht aus anorganischen Gastspezies und γ‐Cyclodextrin als makrocyclischem Wirt. K. Rissanen, D. Gabel, W. M. Nau et al. zeigen in ihrer Zuschrift auf S. 6956 ff., dass die Affinität dieses organisch‐anorganischen Wirt‐Gast‐Komplexes im mikromolaren Bereich auf die chaotrope Natur (Durchbrechen der Wasserstruktur)...
Dodecaborate anions of the type B12X122− and B12X11Y2− (X=H, Cl, Br, I and Y=OH, SH, NH3+, NR3+) form strong (Ka up to 106 L mol−1, for B12Br122−) inclusion complexes with γ‐cyclodextrin (γ‐CD). The micromolar affinities reached are the highest known for this native CD. The complexation exhibits highly negative enthalpies (up to −25 kcal mol−1) and entropies (TΔS up to −18.4 kcal mol−1, both for B...
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