Aliphatic and aromatic C-H activation of benzo[h]quinolines by Rh(I). Unique precursor dependent formation of mono-, di- and trinuclear complexes

Hiyam Salem, Gregory Leitus, Linda J.W. Shimon, Yael Diskin-Posner, David Milstein

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Treatment of 7,8-benzo[h]quinoline (bhq-H, 1) and 10-methyl benzo[h]quinoline (bhq-Me, 3) with [Rh(C2H4) 2(THF)2][BF4] resulted in double C-H activation of aliphatic and aromatic C-H bonds, yielding the Rh(III) complexes 4 and 5, respectively. The structures of 4 and 5 were revealed by X-ray diffraction. The reaction of 1 with two other slightly different rhodium precursors, [Rh(olefin)n(THF)2][BF4] (COE (n = 2), COD (n = 1)), led to completely different products, a dinuclear complex 7 and a trinuclear complex 6, respectively, which were characterized by X-ray diffraction. Complex 6 exhibits a rare linear Rh-Rh-Rh structure. Utilizing excess of 1 with [Rh(COD)(THF)2][BF4] led to the formation of a new product 8 with no C-H bond activation taking place. Additional C-H activation products of 1, cationic and neutral, in the presence of P iPr3 (9a, 9b and 10) are also presented.

Original languageEnglish
Pages (from-to)260-269
Number of pages10
JournalInorganica Chimica Acta
Volume369
Issue number1
DOIs
Publication statusPublished - Apr 15 2011

Keywords

  • 10-Methyl benzo[h]quinolone
  • 7,8-Benzo[h]quinolone
  • C-H bond activation
  • Rhodium complexes
  • Trinuclear complex

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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