Carbon-carbon bond formation promoted by organoruthenium complexes. The first unsubstituted π-metallabenzene complex, Cp*2Ru2(n2:n5-C 5H5)(SiMe3), and synthesis of the tetramethyleneethane complex Cp*2Ru2(n3:n3-C 6H8)Cl4

Wenbin Lin, Scott R. Wilson, Gregory S. Girolami

Research output: Contribution to journalArticle

Abstract

Treatment of the methylene/silyl complex Cp*2Ru2(μ-CH2)(SiMe 3)(μ-Cl) with ethyne in toluene gives several products resulting from carbon-carbon bond coupling reactions; these include the first unsubstituted π-metallabenzene complex, Cp*2Ru2(n2:n5-C 5H5)(SiMe3), 1, the arene complex [Cp*Ru(n6-C6H6)]Cl, 2, and the bridging metallacyclopentadiene complex Cp*2Ru2(n2:n4-C 4H4)Cl2,3. Treatment of [Cp*RuCl2]2 with propadiene also leads to a carbon-carbon bond coupling reaction, and the product is the tetramethyleneethane (i.e., 2,2'-biallyl) complex Cp*2Ru2(n3:n3-C 6H6)Cl4, 4. A single-crystal X-ray diffraction study of 1 shows that the metallabenzene ring is π-bonded to a second metal center and that the trimethylsilyl group is a terminal ligand on the ruthenium center that lies in the metallabenzene ring plane. The aromaticity of the metallabenzene ring in 1 is also discussed.

Original languageEnglish (US)
Pages (from-to)2356-2361
Number of pages6
JournalOrganometallics
Volume16
Issue number11
DOIs
StatePublished - 1997

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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