Russian Journal of Coordination Chemistry

, Volume 31, Issue 11, pp 775–779 | Cite as

Interaction of Fluosilicic Acid with N-tert-Butyl-Substituted Urea. Crystal Structure of N,N-Di-tert-butylurea

  • V. O. Gel'mbol'dt
  • L. V. Koroeva
  • Ya. E. Filinchuk


Fluosilicic acid reacts with solutions of N,N-di-tert-butylurea (DTBU) in methanol or acetone to form crystalline compounds 2DTBU ⋅ H2SiF6 and 2DTBU ⋅ H2SiF6 ⋅ Me2CO, which were characterized by the IR and 19F NMR spectra and mass spectroscopy supplemented by theoretical calculations. According to the data of IR and 19F NMR spectra, the complexes are hexafluorosilicates of O-protonated DTBU. They undergo hydrolysis in organic media with water traces; their solubility in water is very low (0.10 and 0.14 wt %, respectively). In the DTBU structure, two independent ligand molecules are joined by hydrogen bonds NH⋯O(N⋯O) 2.888(5)–2.944(5) Å).


Methanol Hydrolysis Mass Spectroscopy Crystal Structure Acetone 
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Copyright information

© MAIK "Nauka/Interperiodica" 2005

Authors and Affiliations

  • V. O. Gel'mbol'dt
    • 1
  • L. V. Koroeva
    • 1
  • Ya. E. Filinchuk
    • 2
  1. 1.Physicochemical Institute for Human and Environmental Protection, Education DepartmentNational Academy of Sciences of UkraineOdessaUkraine
  2. 2.University of GenevaGenevaSwitzerland

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