Alkylrhenium Oxides from Perrhenates: A New, Economical Access to Organometallic Oxide Catalysts

Abstract

Methyltrioxorhenium in an Erlenmeyer flask: An in situ activation with chloroalkylsilanes converts readily available perrhenates into organorhenium(VII) oxides (as depicted below), which are valuable and diverse homogeneous catalysts. Reaction intermediates are trimethylsilyl perrhenate, dirhenium heptoxide, and chlorotrioxorhenium. The application of methyltrioxorhenium CH3ReO3 (1) in industrial processes might become feasible, particularly since the catalyst can be recycled.

Kinetic and Equilibrium Studies of Reactions of N‐Heterocycles with Dimeric and Monomeric Oxorhenium(V) Complexes

“…[16] It was then used to prepare the rhenium complex that is the focus of this study, the dimer [MeReO(edt)] 2 , which was known from previous research. [17] A new and more efficient synthetic procedure has since been devised.…”

Kostengünstige, effiziente und umweltfreundliche Synthese des vielseitigen Katalysators Methyltrioxorhenium (MTO)

“…b) Die Alkylierung von Re 2 O 7 in Gegenwart von Trifluoressigsäureanhydrid [6] ("Anhydridroute") führt in nahezu quantitativen Ausbeuten zu MTO -allerdings wird auch hier ein toxisches Methylzinnreagens eingesetzt. c) Die Synthese aus anorganischen Perrhenaten über das kovalente Trimethylsilylperrhenat [7] nutzt ebenfalls Tetramethylzinn als Methylierungsmittel. Es ist bekannt, dass Alkylrhenium(VII)-oxide auch mithilfe von Dialkylzink-Verbindungen hergestellt werden können.…”

Method of Preparation for High-Purity Nanocrystalline Anhydrous Cesium Perrhenate

“…It should be noted that, currently, at the large-laboratory scale, MTO is manufactured from silver perrhenate, while Re 2 (CO) 10 is manufactured from ammonium perrhenate [25,26]. Cesium perrhenate has similar properties to silver and ammonium perrhenates and, therefore, it may be applied in MTO and Re 2 (CO) 10 synthesis.…”