Silsesquioxane chemistry II. Tin(IV) and Hafnium(IV) compounds of silsesquioxanes

Yurii K. Gun'ko, László Nagy, Wolfgang Brüser, Volker Lorenz, Axel Fischer, Stephan Gießmann, Frank T. Edelmann, Klaus Jacob, Attila Vértes

Research output: Contribution to journalArticle

16 Citations (Scopus)


Four complexes of silsesquioxanes with di- and triorganotin(IV) cations have been prepared; their composition was determined by standard analytical and spectroscopic methods. The results show that complexes containing an organotin(TV) moiety and the ligand in a 1:1 ratio are formed. FTIR spectra are consistent with the presence of Sn-O vibrations in the compounds. The structure of the complexes is discussed on the basis of Möβbauer and multinuclear (1H, 13C, 119Sn, and 29Si) NMR spectroscopic measurements. Comparison of the experimental quadrupole splitting (QS) with that calculated on the basis of the partial quadrupole splitting (PQS) concept revealed that the complexes formed with dialkyltin(IV) cations as well as the trialkyl derivatives have a regular tetrahedral structure. A new organohafnium silsesquioxane derivative ([Cy7Si7O12Hf(C5Me5)], Cy = cyclohexyl, 5), was prepared by treatment of [Cy7Si7O9(OH)3] with (C5Me5)HfMe3 under elimination of methane. The molecular structure of 5 was determined by X-ray crystallography.

Original languageEnglish
Pages (from-to)45-54
Number of pages10
JournalMonatshefte fur Chemie
Issue number1
Publication statusPublished - Jan 1 1999


  • Möβbauer spectroscopy
  • Organohafnium(IV) compounds
  • Organotin(IV) compounds
  • Silsesquioxanes
  • X-Ray crystallography

ASJC Scopus subject areas

  • Chemistry(all)

Fingerprint Dive into the research topics of 'Silsesquioxane chemistry II. Tin(IV) and Hafnium(IV) compounds of silsesquioxanes'. Together they form a unique fingerprint.

  • Cite this

    Gun'ko, Y. K., Nagy, L., Brüser, W., Lorenz, V., Fischer, A., Gießmann, S., Edelmann, F. T., Jacob, K., & Vértes, A. (1999). Silsesquioxane chemistry II. Tin(IV) and Hafnium(IV) compounds of silsesquioxanes. Monatshefte fur Chemie, 130(1), 45-54.