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  4. The mixed-metal carbonyl cluster anion [Os3Ir(CO)(13)](-): Synthesis, structure, reactivity and catalytic activity in the carbonylation of methanol
 
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The mixed-metal carbonyl cluster anion [Os3Ir(CO)(13)](-): Synthesis, structure, reactivity and catalytic activity in the carbonylation of methanol

Auteur(s)
Süss-Fink, Georg 
Institut de chimie 
Haak, Susanne
Ferrand, Vincent
Stoeckli-Evans, Helen 
Institut de physique 
Date de parution
1999
In
Journal of Molecular Catalysis a-Chemical
Vol.
1-3
No
143
De la page
163
A la page
170
Mots-clés
  • methanol carbonylation
  • acetic acid
  • methyl acetate
  • homogenous
  • catalysis
  • methyl iodide
  • hydriodic acid
  • cluster
  • osmium
  • iridium
  • MOLECULAR-STRUCTURE
  • methanol carbonylatio...

  • acetic acid

  • methyl acetate

  • homogenous

  • catalysis

  • methyl iodide

  • hydriodic acid

  • cluster

  • osmium

  • iridium

  • MOLECULAR-STRUCTURE

Résumé
The cluster anion [Os3Ir(CO)(13)](-) (1) was prepared in 50% yield by reaction of Os-3(CO)(12) with [Ir(CO)(4)](-). The single-crystal X-ray structure analysis of the bis(triphenylphosphoranylidene)ammonium salt shows 1 to consist of a tetrahedral metal core with one of the 13 carbonyl ligands being bridging. Protonation of 1 led to the neutral cluster HOs3Ir(CO)(13) (2), whereas the hydrogenation gave the cluster anion [H2Os3Ir(CO)(12)](-) (3). The catalytic activity of 1 for the carbonylation of methanol was studied. Using CH3I as co-catalyst, catalytic turnover numbers up to 1800 were obtained (140 degrees C, 30 bar) within 14 h. (C) 1999 Elsevier Science B.V. All rights reserved.
Identifiants
https://libra.unine.ch/handle/123456789/13499
Type de publication
journal article
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