Synthesis, structure, and oxidation-induced dimerization of a cheating bis(phosphite) Ruthenium carbonyl

Bahram Moasser, Christopher Gross, Wayne L Gladfelter

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16 Scopus citations


The novel bis(phosphite) compound Ru(bbmb)(CO)3 (1) {bbmb: 2,2′-bis[(1,1′-bipheny]-2,2′-diyl)phosphite]-3,3′-di-t- butyl-5,5′-di-methoxy-1,1′-biphenyl} was synthesized by the high pressure reaction of Ru3(CO)12 with bbmb, and fully characterized by combustion, spectroscopic, spectrometric and structural analysis. The structure of 1, as determined by X-ray diffraction, is a nearly perfect trigonal bipyramid with the bbmb ligand coiled about Ru in an overall C2 fashion. Reaction of 1 with [Cp2Fe][PF6] gave [Ru2(μ-bbmb)2(CO)6][PF6]2 (2) whose formulation is based on combustion and spectroscopic analysis. It is shown that 2 contains a pair of bridging bbmb ligands. The significance of 1 in relation to structure- activity in the regioselectivity of the hydroformylation reaction is discussed. Formation of 2 from 1 is addressed in the context of the reactivity of pentacoordinate radical cation complexes.

Original languageEnglish (US)
Pages (from-to)201-209
Number of pages9
JournalJournal of Organometallic Chemistry
Issue number1-2
StatePublished - May 31 1994

Bibliographical note

Funding Information:
The researchw as supported by a grant from the National ScienceF oundation( CHE-9223433).


  • Bis(phosphite)
  • Carbonyl
  • Crystal structure
  • Ruthenium


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