Synthesis and structures of bis(silylene)iron complexes containing new six-membered chelate rings

Hiromi Tobita, Takahiro Sato, Masaaki Okazaki, Hiroshi Ogino

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Reaction of Cp′Fe(CO)2SiMe2SiMe2Cl (1a: Cp′ = η5-C5H5 (Cp), 1b: Cp′ = η5-C5Me5 (Cp*)) with acetic acid in the presence of base (pyridine or Et3N) afforded Cp′Fe(CO)2SiMe2SiMe2OCOMe (2a: Cp′ = Cp, 77%; 2b: Cp′ = Cp*, 87%). Similarly, the reaction of 1b with 2-pyridone in the presence of Et3N gave Cp*Fe(CO)2SiMe2SiMe2O(2-C 5H4N) (3, 43%). Photolysis of 2a, 2b, and 3 produced Cp′(CO)Fe {SiMe2⋯OC(Me)O⋯SiMe2} (4a: Cp′ = Cp, 4b: Cp′ = Cp*) and Cp*(CO)Fe{SiMe2⋯O(2-C5H 4N)⋯SiMe2} (5) quantitatively, in which an acetoxy or 2-pyridyloxy group bridges two silylene ligands to form a six-membered chelate ring. 4a and 5 were structurally characterized by single-crystal X-ray diffraction experiments. All the Fe-Si bonds are significantly shorter than normal Fe-Si single bonds and are consistent with their unsaturated bond character. The six-membered chelate ring consists of two entirely different and delocalized unsaturated bond systems.

Original languageEnglish
Pages (from-to)314-322
Number of pages9
JournalJournal of Organometallic Chemistry
Volume611
Issue number1-2
DOIs
Publication statusPublished - 2000 Oct 6

Keywords

  • Chelate
  • Iron complex
  • Photolysis
  • Silylene complex
  • X-ray structure analysis

ASJC Scopus subject areas

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

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