Cluster fragmentation and facile cleavage of phenyl groups from the SnPh 3 ligand in reactions of Os 3(CO) 11(SnPh 3)(μ-H) with CO and HSnPh 3

Richard D. Adams, Burjor Captain, Lei Zhu

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Two new cluster complexes, Os 3(CO) 12(Ph)(μ 3-SnPh), 8 (35% yield), and Os 4(CO) 164-Sn), 9 (10% yield), were formed when the complex Os 3(CO) 11(SnPh 3)(μ-H), 6, was heated to reflux in toluene solvent under a CO atmosphere. Compound 8 was transformed to 9 in 28% yield when a solution in octane solvent was heated to reflux under a CO atmosphere. Biphenyl was a coproduct in this reaction. Compound 8 contains three osmium atoms with a triply bridging SnPh group. The triosmium cluster has opened and there is only one Os-Os bond between the three osmium atoms. Compound 9 contains two Os 2(CO) 8 groups held together by a central quadruply bridging tin atom, giving an overall bow-tie structure for the five metal atoms. Two other new compounds, Os 2(CO) 6(μ-SnPh 2) 2(SnPh 3) 2, 10, and HOs(CO) 4(SnPh 3), 11, were formed in 51% and 20% yields, respectively, from the reaction of 6 with HSnPh 3. Compound 10 contains only two osmium atoms linked by an Os-Os bond and two bridging SnPh 2 ligands. Each osmium atom also contains one terminal SnPh 3 ligand. Compound 11 contains only one osmium atom. It has one SnPh 3 ligartd and a hydrido ligand in cis position in the six-coordinate pseudo-octahedral complex. All four new compounds were characterized by single-crystal X-ray diffraction analysis.

Original languageEnglish (US)
Pages (from-to)4183-4187
Number of pages5
JournalOrganometallics
Volume25
Issue number17
DOIs
StatePublished - Aug 14 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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