Dioxidomolybdenum(VI) and -tungsten(VI) complexes with tripodal amino bisphenolate ligands as epoxidation and oxo-transfer catalysts

Research output: Contribution to journalArticle

Abstract

The molybdenum(VI) and tungsten(VI) complexes [MO2(L)] (M = Mo (1), W (2), H2L = bis(2-hydroxy-3,5-di-tert-butybenzyl)morpholinylethylamine) were synthesized and the complexes were used to catalyze oxotransfer reactions, viz. sulfoxidation, epoxidation and benzoin oxidation. For comparison, the same reactions were catalyzed using the known complexes [MO2(L′)] (M = Mo (3), W (4), H2L′ = bis(2-hydroxy-3,5-di-tert-butybenzyl)ethanolamine) and [MO2(L″)] (M = Mo (5), W (6), H2L″ = bis(2-hydroxy-3,5-di-tert-butybenzyl)diethyleneglycolamine). The oxo atom transfer activity between DMSO and benzoin at 120 °C was identical for all studied catalysts. Reasonable catalytic activity was observed for sulfoxidation by the molybdenum complexes, but all tungsten complexes were found to be inactive. Similarly, the molybdenum complex 1 exhibited relatively good epoxidation activity, while the corresponding tungsten complex 2 catalyzed only the epoxidation of cis-cyclooctene with low activity.

Details

Authors
  • Kamal Hossain
  • Jörg A. Schachner
  • Matti Haukka
  • Ari Lehtonen
  • Nadia C. Mösch-Zanetti
  • Ebbe Nordlander
Organisations
External organisations
  • University of Jyväskylä
  • University of Turku
  • Karl-Franzens-University of Graz
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Materials Chemistry
  • Inorganic Chemistry

Keywords

  • Epoxidation, Molybdenum, Oxygen atom transfer, Sulfoxidation, Tungsten
Original languageEnglish
Pages (from-to)275-281
Number of pages7
JournalPolyhedron
Volume134
StatePublished - 2017 Sep 25
Peer-reviewedYes