Reactions of VX, HD, and Their Simulants with NaY and AgY Zeolites. Desulfurization of VX on AgY
| Autor: | George W. Wagner, Philip W. Bartram |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
chemistry.chemical_classification
Sulfide Chemistry Salt (chemistry) Surfaces and Interfaces Condensed Matter Physics Decomposition Medicinal chemistry Catalysis Hydrolysis chemistry.chemical_compound Yield (chemistry) Electrochemistry Magic angle spinning Organic chemistry General Materials Science Spectroscopy EMPA |
| Zdroj: | Langmuir. 15:8113-8118 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | The room-temperature reactions of the chemical warfare agents VX (O-ethyl S-2-(diisopropylamino)ethyl methylphosphonothioate), HD (2,2‘-dichloroethyl sulfide, or mustard), and their common simulants, O,S-diethyl phenylphosphonothioate (DEPPT) and 2-chloroethyl phenyl sulfide (CEPS), with NaY and silver-exchanged (AgY) zeolites have been studied using solid-state magic angle spinning NMR. VX hydrolyzes via exclusive cleavage of the P−S bond on both NaY and AgY to yield ethyl methylphosphonate (EMPA). The reaction is significantly faster on AgY than on NaY, suggesting catalysis by silver. On AgY, an intermediate silver salt of EMPA is apparently formed which is slowly converted to ethyl 2-(diisopropylamino)ethyl methylphosphonate (QB, the desulfurized analogue of VX) in about a 78% yield. DEPPT similarly hydrolyzes via P−S cleavage on AgY to yield an apparent silver salt of ethyl phenylphosphonate, which does not undergo further reaction to the desulfurized analogue. No reaction is observed for DEPPT on NaY... |
| Databáze: | OpenAIRE |
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