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The point symmetries of the halogenohydrohexaborates within the nearly complete series X n B 6 H 6-n  2- , X = Cl, Br, I; n = 1-5, are determined from the  11 B and  11 B{ 1 H} NMR spectra, which show characteristic features for homologous isostructural compounds related to the electronegativity of the substituents. The chemical shifts are mainly influenced by -I, +M, and in the case of X = I by the heavy atom effect. Along with a strong antipodal effect a slight vicinal influence between neighbours in the B 6  cage is observed, increasing with the number of substituted atoms

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closo-Halogenohydrohexaborate, II  11 B-NMR-Spektren der closo-Halogenohydrohexaborate X n B 6 H 6-n  2- , n = 0-6; X = Cl, Br, I / closo-Halogenohydrohexaborate, II  11 B NMR Spectra of the closo-Halogenohydrohexaborates X n B 6 H 6-n  2- , n = 0-6; X = Cl, Br, I