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
Por:
Richtera L., Jancik V., Martínez-Otero D., Pokluda A., Zak Z., Taraba J., Touzin J.
Publicada:
7 jul 2014
Resumen:
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)(2)SeO2 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).
Filiaciones:
Richtera L.:
Institute of Materials Chemistry, Faculty of Chemistry, Brno University of Technology, Purkynova 118, 612 00 Brno, Czech Republic
Jancik V.:
UAEM UNAM, Ctr Conjunto Invest Quim Sustentable, Toluca 50200, Estado De Mexic, Mexico
Martínez-Otero D.:
UAEM UNAM, Ctr Conjunto Invest Quim Sustentable, Toluca 50200, Estado De Mexic, Mexico
Pokluda A.:
Department of Chemistry, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
Zak Z.:
Department of Chemistry, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
Taraba J.:
Department of Chemistry, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
Touzin J.:
Department of Chemistry, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic
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