Secondary interactions as defined by 35Cl NQR spectra in cesium decachloro-closo-decaborates prepared in non-aqueous solutions

Abstract

Two solvates of cesium decachloro-closo-decaborate, Cs2[B10Cl10]·2CH3CN and Cs2[B10Cl10]·4DMF, are synthesized and characterized by IR-, 11B NMR, and 35Cl NQR-spectroscopies as well as X-ray diffraction and powder diffraction analyses. The weak secondary interactions involving chlorine atoms were selected by the 35Cl NQR spectra of the full set of interatomic contacts characterized by X-ray diffraction. It has been found that the chlorine atoms form numerous secondary interactions with solvate molecules (B−Cl…H and B−Cl…C interactions with methyl groups and p…π with CN groups), whereas no noticeable perturbation of the chlorine electron density distribution, which could result in the splitting of the 35Cl NQR spectra, has been found due to the cesium cations or Cl…Cl interactions.