Darstellung und Eigenschaften des Selentrioxyds

Toul, F.; Dostál, K.

doi:10.1135/cccc19510531

Cited by 27 publications

(6 citation statements)

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“…Selenium trioxide is a strong oxidising agent and extremely sensitive to moisture. The first synthesis of selenium trioxide was reported in the last century1, 2 and the compound was studied later by Kempe 3. Since then, selenium trioxide has been studied by various experimental techniques,4–6 and also by mass spectrometry7, 8 in a few literature sources.…”

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confidence: 99%

Laser ablation synthesis of selenium superoxide anion SeO via selenium trioxide photolysis. Time‐of‐flight mass spectrometry and ab initio calculations

Alberti

Špalt

Peña‐Méndez

et al. 2005

Rapid Comm Mass Spectrometry

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Laser desorption/ionisation and laser ablation of solid selenium trioxide, as well as the gas-phase behaviour of selenium trioxide, were studied. Selenium trioxide undergoes photochemical decomposition and, from the mass spectra obtained by laser desorption/ionisation time-of-flight mass spectrometry (LDI-TOF-MS), the following species were identified: O-, O2-, O3-, SeO-, SeO2-, SeO3-, SeO4-, Se2O7-, Se3O11-, and Se4O14-. Formation of the selenium superoxide SeO4- anion is described in this work for the first time. In addition, low-abundance selenium species such as Se2O8H2-, Se3O11H-, and Se4O15H2- were also detected. The stoichiometry of all ions was confirmed via isotopic pattern modeling and/or post-source decay (PSD) analysis. Photolysis of selenium trioxide leads partly to ozone formation. It was found that the most likely mechanisms of selenium superoxide formation are oxidation of selenium trioxide with ozone and/or reactive oxygen radicals, or photolysis of selenium trioxide tetramer (SeO3)4. Therefore, ab initio calculations were performed to support the mass spectrometric evidence and to suggest probable geometries for selenium superoxide anion SeO4- and diselenium superoxide anion Se2O7-, as well as to provide insight into and/or predict possible formation pathways. It has been found that both cyclic and non-cyclic peroxide structures of SeO4- and Se2O7- ions are possible. In addition, the SeO4 structure was also calculated guided by thermodynamic considerations using Gaussian-2 methodology, and the inferred stability of the SeO4 neutral molecule was supported by ab initio calculations.

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confidence: 99%

Laser ablation synthesis of selenium superoxide anion SeO via selenium trioxide photolysis. Time‐of‐flight mass spectrometry and ab initio calculations

Alberti

Špalt

Peña‐Méndez

et al. 2005

Rapid Comm Mass Spectrometry

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“…Selenium trioxide was prepared by dehydration of anhydrous selenic acid over P 4 O 10 . 8 Anhydrous selenic acid (20 mL) was distributed evenly over P 4 O 10 (60 g) in a large grease-free sublimation apparatus. After 4 h, the sublimation was started, and crude SeO 3 sublimed at 160 °C in a dynamic vacuum.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Exposing 1 to temperatures over 15 °C or any attempt to recrystallize it led to its decomposition. Raman spectrum: ν̃(int) 109 (33), 128 (46), 135 (39), 177 (59), 204 (43), 278 (33), 331 (31), 393 (15), 408 (25), 473 (31), 594 (6), 716 (5), 826 (53), 849 (10), 876 (6), 926 (100), 987 (34), 994 (80), 1012 (34), 1039 (5), 1089 (6), 1129 (15), 1221 (10), 1298 (6), 1308 (16), 1338 (5), 1376 (5), 1446 (16), 1460 (12), 2670 (2), 2723 (3), 2744 (3), 2782 (3), 2867 (7), 2875 (8), 2900 (10), 2919 (11), 2933 (15), 2948 (12), 2986 (22), 2996 (14), 3013 (17) cm −1 .…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Compound 2 is isolated by filtration and drying in vacuum in 80% yield. Raman spectrum: ν̃(int) 113 (22), 147 (29), 181 (58), 212 (10), 234 (9), 258 (5), 281 (14), 323 (33), 337 (28), 394b (9), 426 (3), 447 (14), 460 (5), 484 (17), 548b (11), 568sh (5), 819 (50), 824 (69), 847 (10), 852 (8), 921 (75), 958 (36), 987 (100), 1011 (30), 1038 (3), 1086 (3), 1125 (13), 1218 (10), 1225 (6), 1295sh (4), 1301sh (5), 1308 (17), 1335 (3), 1374 (5), 1383 (5), 1399 (2), 1443 (19), 1460 (13), 2732 (5), 2737 (6), 2791 (5), 2869 (21), 2895 (20), 2911 (21), 2925 (22), 2971 (21), 2985 (29), 2991sh (26) cm −1 .…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Taming the Oxidative Power of SeO₃ in 1,4-Dioxane, Isolation of Two New Isomers of Mixed-Valence Selenium Oxides, and Two Unprecedented Cyclic Esters of Selenic Acid

et al. 2014

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The reaction of (SeO3)4 with 1,4-dioxane (diox, dioxane) with or without diluting solvent led to the isolation of the unprecedented esters of selenic acid-1,2-ethyl selenate (CH2O)2SeO2 and the glyoxal diselenate O2Se[(OCHO)2]SeO2. It was possible to isolate an unknown dimeric form of Se2O5 (Se4O10·(diox)2) and a geometrical isomer of the mixed-valence oxide trans-Se3O7, both stabilized by dioxane. The dioxane adduct of monomeric selenium trioxide SeO3·diox was obtained from the reaction of (SeO3)4 with dioxane in liquid SO2. The reaction mechanism for the formation of these compounds was elucidated, and the molecular structure of the unstable form of the selenium trioxide was determined, consisting in a trimeric arrangement (SeO3)3.

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“…By analogy with the green colour of selenium formed in concentrated H 2 S0 4 , they ascribed the green colour in selenic acid to Se203. A more recent paper describing the preparation of pure Se03 (10) states that selenium reacts with SeOa to give a green substance, probably Se203. Wiberly (11) et al have suggested the use of the green selenium and red tellurium solutions as a spectrophotometric method of analysis for these elements.…”

Section: Introductionmentioning

confidence: 99%

Polyatomic Cations of Sulfur, Selenium, and Tellurium

Dean

Gillespie

Ummat

et al. 1974

Inorganic Syntheses

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Absorption spectrum of the Se~+ cation in HS0 3 F Structures of the•Se!+ cation . • . • . Absorption spectrum of the Te:+ cation in HS0 3 F Raman spectrum of the red solution of tellurium in HS03F Absorption spectrum of a HS0 3 F solution of the product obtained from the reaction between tellurium and S03 . . Raman spectrum of the product obtained from the reaction between tellurium and SO a • • • • • • • • • • • • • • Absorption spectrum of the Te~+ cation is HS0 3 F-SbF 5 Raman spectrum of Te~+(SbF;)n at -90°C . . • . . . • 14.

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Darstellung und Eigenschaften des Selentrioxyds

Cited by 27 publications

References 0 publications

Laser ablation synthesis of selenium superoxide anion SeO via selenium trioxide photolysis. Time‐of‐flight mass spectrometry and ab initio calculations

Laser ablation synthesis of selenium superoxide anion SeO via selenium trioxide photolysis. Time‐of‐flight mass spectrometry and ab initio calculations

Taming the Oxidative Power of SeO₃ in 1,4-Dioxane, Isolation of Two New Isomers of Mixed-Valence Selenium Oxides, and Two Unprecedented Cyclic Esters of Selenic Acid

Polyatomic Cations of Sulfur, Selenium, and Tellurium

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Darstellung und Eigenschaften des Selentrioxyds

Cited by 27 publications

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Laser ablation synthesis of selenium superoxide anion SeO via selenium trioxide photolysis. Time‐of‐flight mass spectrometry and ab initio calculations

Laser ablation synthesis of selenium superoxide anion SeO via selenium trioxide photolysis. Time‐of‐flight mass spectrometry and ab initio calculations

Taming the Oxidative Power of SeO3 in 1,4-Dioxane, Isolation of Two New Isomers of Mixed-Valence Selenium Oxides, and Two Unprecedented Cyclic Esters of Selenic Acid

Polyatomic Cations of Sulfur, Selenium, and Tellurium

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Taming the Oxidative Power of SeO₃ in 1,4-Dioxane, Isolation of Two New Isomers of Mixed-Valence Selenium Oxides, and Two Unprecedented Cyclic Esters of Selenic Acid