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

Hossain, Kamal LU ; Schachner, Jörg A.; Haukka, Matti; Lehtonen, Ari; Mösch-Zanetti, Nadia C. and Nordlander, Ebbe LU (2017) In Polyhedron 134. p.275-281
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... (More)

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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Epoxidation, Molybdenum, Oxygen atom transfer, Sulfoxidation, Tungsten
in
Polyhedron
volume
134
pages
7 pages
publisher
Elsevier
external identifiers
  • scopus:85021884119
ISSN
0277-5387
DOI
10.1016/j.poly.2017.04.036
language
English
LU publication?
yes
id
c9cad2ed-04c0-4e19-adbc-69ad80df4140
date added to LUP
2017-07-24 08:45:47
date last changed
2017-07-24 08:45:47
@article{c9cad2ed-04c0-4e19-adbc-69ad80df4140,
  abstract     = {<p>The molybdenum(VI) and tungsten(VI) complexes [MO<sub>2</sub>(L)] (M = Mo (1), W (2), H<sub>2</sub>L = 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 [MO<sub>2</sub>(L′)] (M = Mo (3), W (4), H<sub>2</sub>L′ = bis(2-hydroxy-3,5-di-tert-butybenzyl)ethanolamine) and [MO<sub>2</sub>(L″)] (M = Mo (5), W (6), H<sub>2</sub>L″ = 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.</p>},
  author       = {Hossain, Kamal and Schachner, Jörg A. and Haukka, Matti and Lehtonen, Ari and Mösch-Zanetti, Nadia C. and Nordlander, Ebbe},
  issn         = {0277-5387},
  keyword      = {Epoxidation,Molybdenum,Oxygen atom transfer,Sulfoxidation,Tungsten},
  language     = {eng},
  month        = {09},
  pages        = {275--281},
  publisher    = {Elsevier},
  series       = {Polyhedron},
  title        = {Dioxidomolybdenum(VI) and -tungsten(VI) complexes with tripodal amino bisphenolate ligands as epoxidation and oxo-transfer catalysts},
  url          = {http://dx.doi.org/10.1016/j.poly.2017.04.036},
  volume       = {134},
  year         = {2017},
}