The (phosphino)tetraphenylborate ligand in ruthenium-arene chemistry

Michael T. Beach, Jesse M. Walker, Timothy G. Larocque, Justin L. Deagle, Ruiyao Wang, Gregory J. Spivak*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The synthesis of a series of anionic half-sandwich ruthenium-arene complexes [E][RuCl26-p-cymene){PR2(p-Ph3BC6H4)}] (E = Bu4N+: R = Ph, 1a, iPr, 1b or Cy, 1c; E = bis(triphenylphosphine)iminium or PNP+: R = Ph, 1a′, iPr, 1b′ or Cy, 1c′) are reported. X-ray crystallographic studies of 1a′ and 1b′ confirmed the three-legged piano-stool coordination geometry. In solution, complexes 1a-c and 1a′-c′ are proposed to form monomer-dimer equilibria as a result of chloride ligand dissociation. Complexes 1a-c and 1a′-c′ also form the formally neutral zwitterionic complexes [RuCl(L)(η6-p-cymene){PR2(p-Ph3BC6H4)}] (L = pyridine: R = Ph, 2a, iPr, 2b or Cy, 2c; L = MeCN: R = Ph, 3a, iPr, 3b or Cy, 3c) via chloride ligand abstraction using AgNO3 or MeOTf.

Original languageEnglish
Pages (from-to)2921-2928
Number of pages8
JournalJournal of Organometallic Chemistry
Issue number17
Publication statusPublished - 15 Aug 2008
Externally publishedYes


  • (Phosphino)tetraphenylborate
  • Anionic phosphine
  • Arene
  • Half-sandwich
  • Ruthenium
  • Zwitterionic


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