Recent advances in the chemistry of rhenium

Rouschias, G.

doi:10.1021/cr60291a002

Cited by 226 publications

(105 citation statements)

References 146 publications

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“…[25] Re 3+ , Re 2+ and Re 1+ are not known to exist as oxides, but have been reported in metal complexes -for example, using carbonyl or organo-metallic ligands. [21] Rhenium has been the focus of catalysis research for several decades, and the oxidation states of rhenium catalysts have traditionally been determined using thermo-gravimetric titration measurements. [3,19,[26][27][28][29] These methods yield stoichiometries indirectly, and often require one to speculate the surface species present in the working catalyst.…”

Section: -315mentioning

confidence: 99%

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The Oxidation of Rhenium and Identification of Rhenium Oxides During Catalytic Partial Oxidation of Ethylene: An In-Situ XPS Study

Greiner

Rocha

Johnson

et al. 2014

Zeitschrift Für Physikalische Chemie

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Rhenium is catalytically active for many valuable chemical reactions, and consequently has been the subject of scientific investigation for several decades. However, little is known about the chemical identity of the species present on rhenium surfaces during catalytic reactions because techniques for investigating catalyst surfaces in-situ -such as near-ambient-pressure X-ray photoemission spectroscopy (NAP-XPS) -have only recently become available. In the current work, we present an in-situ XPS study of rhenium catalysts. We examine the oxidized rhenium species that form on a metallic rhenium foil in an oxidizing atmosphere, a reducing atmosphere, and during a model catalytic reaction (i.e. the partial-oxidation of ethylene). We find that, in an oxidizing environment, a Re 2 O 7 film forms on the metal surface, with buried layers of sub-oxides that contain Re 4+ , Re 2+ and Re

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Section: -315mentioning

confidence: 99%

“…Note that the oxides tend to form a surface layer of Re 2 O 7 when exposed to air, because Re 2 O 7 is thermodynamically most stable. [21] Furthermore, Re 2 O 7 is very hygroscopic, so this surface layer adsorbs water. [21] Thus the spectra of ReO 3 (Figure 1-ii) exhibits features from a ca.…”

Section: Rhenium Oxide Referencesmentioning

confidence: 99%

The Oxidation of Rhenium and Identification of Rhenium Oxides During Catalytic Partial Oxidation of Ethylene: An In-Situ XPS Study

Greiner

Rocha

Johnson

et al. 2014

Zeitschrift Für Physikalische Chemie

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“…In summary, this comparison suggests that the structures of the anions in the title compound are affected The two cations have almost linear axes P-Au-P with angles of 178.1(1) [Au (1)] and 172.58 (7) • [Au (2)]. The two Ph 3 P ligands at each gold atoms are in a staggered corformation with dihedral angles close to 60 • : C(1)-P(1)-P(2)-C(31) 56.0 • , C(37)-P(3)-P(4)-C(61) 65.9 • .…”

Section: Reomentioning

confidence: 92%

Bis(triphenylphosphine)gold(I) Perrhenate

Baer

Pöthig

Bawaked

et al. 2013

Zeitschrift Für Naturforschung B

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Dedicated to Professor Bernd Krebs on the occasion of his 75 th birthdayBis(triphenylphosphine)gold(I) perrhenate [Ph 3 PAuPPh 3 ] + ReO 4 − has been prepared in high yield from Ph 3 PAuCl, Ph 3 P and AgReO 4 in a mixed solvent. The compound is stable in air and decomposes at 235 • C. In the crystal structure, the two independent perrhenate anions are not approaching the gold centers of the two independent cations, but weak interionic interactions are entertained via π-π stacking of phenyl groups and C-H···O contacts. As three-blade chiral rotors, the Ph 3 P ligands of the cations are in a staggered conformation at the gold atoms with only slightly bent P-Au-P axes. IR and NMR data show no anomalies and are close to those of alkali or onium perrhenates.

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“…Rather weak bands in the visible region at λ max = 430 nm and 570 nm appeared but could not be assigned. They are attributed to some kind In previous studies attempts to isolate rhenate(V) failed owing to its subsequent disproportionations [13]. However, the presence of weak bands of the photolysis products in the spectrum of Fig.…”

Section: Introductionmentioning

confidence: 96%

Photooxidation of Methane to Methanol by Perrhenate in Water under Ambient Conditions

Kunkely

Vogler

2013

Zeitschrift Für Naturforschung B

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The oxidation of methane to methanol takes place selectively by the photolysis of perrhenate in aqueous solution in the presence of methane. This photoreaction is formally an oxygen atom transfer. Because the reoxidation of the reduced perrhenate is accomplished with hydrogen peroxide the overall process can be viewed as photocatalytic oxidation of methane to methanol: CH 4 + H 2 O 2 → CH 3 OH + H 2 O.

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Recent advances in the chemistry of rhenium

Cited by 226 publications

References 146 publications

The Oxidation of Rhenium and Identification of Rhenium Oxides During Catalytic Partial Oxidation of Ethylene: An In-Situ XPS Study

The Oxidation of Rhenium and Identification of Rhenium Oxides During Catalytic Partial Oxidation of Ethylene: An In-Situ XPS Study

Bis(triphenylphosphine)gold(I) Perrhenate

Photooxidation of Methane to Methanol by Perrhenate in Water under Ambient Conditions

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