Radical Exchanges and Structural Transformations on the Iron Carbonyl-Bulky Tin Cluster Complex, Fe 2(μ-SnBu 2 t) 2(CO) 8 by Solvents Toluene, Xylenes and Ethylbenzene

Lei Zhu, Veeranna Yempally, Derek Isrow, Perry J. Pellechia, Burjor Captain

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

The reaction of Fe 2(CO) 9 and Bu 3 tSnH yielded the bimetallic cluster complexes Fe 2(μ-SnBu 2 t) 2(CO) 8, 1, and Fe 44-Sn)(μ-SnBu 2 t) 2(CO) 16, 3. Compound 3 contains two Fe 2(CO) 8(μ-SnBu 2 t) groups held together by a central quadruply bridging tin atom, giving an overall bow-tie structure for the one tin and four iron atoms. Refluxing compound 1 in toluene solvent affords the complex Fe 2[μ-SnBu t(CH 2Ph)] 2(CO) 8, 4, where two of the Bu t groups in 1 have been replaced with benzyl groups, as a result of selective benzylic C-H bond activation of solvent toluene. Similarly refluxing compound 1 in ortho-, meta- and para-xylene solvents gives the complexes where two, three and four of the Bu t groups in 1 have been replaced by the respective xylyl groups. Compound 1 also reacts with ethylbenzene to furnish the complex Fe 2[μ-SnBu t(MeCHPh)] 2(CO) 8, 14, where two of the Bu t groups in 1 have been replaced as a result of the benzylic C-H activation of ethylbenzene. A mechanism based on a radical pathway is proposed for the selective C-H bond activation by 1.

Original languageEnglish (US)
Pages (from-to)627-648
Number of pages22
JournalJournal of Cluster Science
Volume23
Issue number3
DOIs
StatePublished - Sep 1 2012

Keywords

  • Bimetallic clusters
  • C-H activation
  • Ethylbenzene
  • H atom abstraction
  • Iron
  • Tin
  • Toluene
  • Xylene

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Biochemistry

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