Stable and catalytically highly active ansa compounds with cycloalkyl moieties as bridging units

Alejandro Capapé, Alexander Raith, Fritz E. Kühn

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

The complexes Mo{η5-C5H4[CH(CH 2)3]-η1-CH}(CO)3 (2a) and W{η5-C5H4[CH(CH2) 3]-η1-CH}CO)3 (2b) were synthesized by reacting spiro-[4.2]bicyclo[4.1]deca-6,8-diene (1) with the tri(acetonitrile) tri(carbonyl)metal complexes M(CO)3(CH3CN)3 (M=Mo, W). Thermogravimetric (TGA) measurements confirm that the complexes are stable up to 140°C in air in the solid state. The complexes 2a and 2b are very active catalysts at room temperature for the epoxidation of cyclooctene with tert-butyl hydroperoxide (TBHP) as oxidant, reaching TOFs of up to 3650 h-1. Complex 2a achieves a quantitative product yield without formation of any by-products within 1.5 h, outperforming previously published ansa compounds and performing on par with the cyclopentadienyltri-(carbonyl) (halo)- or (alkyl)molybdenum compelxes CpMo(CO)3R (R=Hal, Me, Et).

Original languageEnglish
Pages (from-to)66-70
Number of pages5
JournalAdvanced Synthesis and Catalysis
Volume351
Issue number1-2
DOIs
StatePublished - Jan 2009

Keywords

  • ansa compounds
  • Catalyst design
  • Epoxidation
  • Molybdenum
  • Tungsten

Fingerprint

Dive into the research topics of 'Stable and catalytically highly active ansa compounds with cycloalkyl moieties as bridging units'. Together they form a unique fingerprint.

Cite this