Journal of Structural Chemistry

, Volume 34, Issue 2, pp 244–247 | Cite as

Structural features of potassium and cesium dodecahydro-closo-dodecaborates(2-) according to1H and11B NMR data

  • S. G. Kozlova
  • N. K. Moroz
  • V. V. Volkov
Article

Abstract

The structural and dynamic characteristics of the salts K2B12H12 (I) and Cs2B12H12 (II), containing an icosahedral closo-anion B12H122-, were investigated by the NMR method. Disagreement was found between the obtained NMR data and the published results from an x-ray crystallographic analysis with respect to the position of the H and B atoms in the crystal lattices of the compounds. The1H and11B NMR data give reason to suppose that compounds (I) and (II) can be assigned to the quasiperiodic crystal class with respect to the positions of the H and B atoms. From analysis of the line shapes in the1H NMR spectra the interatomic separations r(B-H) in the B12H122− anion in the salts (I) and (II) were determined (1.21±0.01 Å). Activation dynamics characterized by activation barriers of 54.4 and 38.9 kJ/mole respectively were obtained for the B12H122− anions.

Keywords

Potassium Physical Chemistry Inorganic Chemistry Structural Feature Crystal Lattice 

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Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • S. G. Kozlova
  • N. K. Moroz
  • V. V. Volkov

There are no affiliations available

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