Selective dynamics of [Rh(1,5-COD)(bidentate)]BF4 complexes via NMR exchange spectroscopy

Massimiliano Valentini, Kumaravel Selvakumar, Michael Wörle, Paul S. Pregosin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


NMR exchange measurements on [Rh(1,5-COD)(bidentate)]BF4 complexes (bidentate = chiral bis-phosphine, a P,N-phosphino-oxazoline, a P,S-phosphito-thioether and a bis-pyrazolylborate) show selective 1,5-COD dynamics which can be superficially attributed to olefin rotation. It is suggested that the mechanism actually involves: (i) M-L1 bond breaking (L1 = N or S-donor); (ii) isomerization of the T-shaped species; (iii) rotation around the remaining M-L2 bond and (iv) recomplexation. The solid state structures of the two compounds [M(1,5-COD)(10)]BF4, M = Rh, Ir and 10=(S,R)-2-[4-(isopropyl)oxazol-2-yl]-2′-diphenylphosphino-1,1′- binaphthyl, were determined by X-ray diffraction methods.

Original languageEnglish
Pages (from-to)244-251
Number of pages8
JournalJournal of Organometallic Chemistry
Issue number2
Publication statusPublished - Sept 25 1999
Externally publishedYes


  • 2 D-exchange NMR
  • X-ray diffraction
  • [Rh(1,5-COD)(bidentate)]

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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