Ion association trends in alkaline earth-metal tetraphenylborates

Abhilasha Verma, Marites Guino-O, Miriam Gillett-Kunnath, Weijie Teng, Karin Ruhlandt-Senge

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


A family of cationic heavy alkaline earth-metal complexes based on the weakly coordinating tetraphenylborate anion [BPh4]provides unique insight into ion association trends within this family of compounds. The compounds were prepared by protonolysis of the respective alkaline earth-metal bis[bis(trimethylsilyl)]amides M[N(SiMe3)2] 2(thf)2 (M = Ca, Sr, Ba) with ammonium tetra-phenylborates [R3NH][BPh4] (R = Me, Et) in various stoichio-metric ratios, resulting in the separated ions [M(donor)n][BPh 4]2 (M = Ca, Sr, Ba; n = number of donors). All compounds but [Ba(hmpa)6][BPh4]2 (3c) were characterized using single-crystal X-ray diffraction, 1H and 13C NMR, IR spectroscopy and melting point.

Original languageEnglish (US)
Pages (from-to)903-913
Number of pages11
JournalZeitschrift fur Anorganische und Allgemeine Chemie
Issue number6-7
StatePublished - May 2009


  • Alkaline earth metals
  • Ion association
  • Tetraphenylborate
  • Weakly coordinating anion

ASJC Scopus subject areas

  • Inorganic Chemistry


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