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|a (DE-627)NLM150414412
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|a (NLM)15366056
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Haire, D Lawrence
|e verfasserin
|4 aut
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|a Electron spin resonance study of phosphorus-nitroxides from 1,3-additions of silicon-phosphorus reagents to nitrones
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|c 2004
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 17.03.2005
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|a Date Revised 24.11.2016
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|a published: Print
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|a Citation Status MEDLINE
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|a Copyright 2004 John Wiley & Sons, Ltd.
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|a This article explores a new, convenient route to beta-phosphorus nitroxides. Specifically, the reaction sequence involves the novel 1,3-addition of trimethylsilyl phosphites (e.g. diethyl) or trimethylsilyl phosphines (e.g. diphenyl) to aldo-nitrones [e.g. alpha-phenyl-N-tert-butylnitrone (PBN) or 5,5-dimethyl-l-pyrroline-N-oxide (DMPO)] or keto-nitrones [e.g. 2-ethyl-5,5-dimethyl-1 pyrroline-N-oxide (2-Et-DMPO) or 2-phenyl-5,5-dimethyl-l-pyrroline-N-oxide (2-Ph-DMPO)] to form alpha-phosphityl- or alpha-phosphinyl-O-silylhydroxylamines. Acidic hydrolysis provides the corresponding hydroxylamines that are easily oxidized to the title beta-phosphorus-nitroxides. ESR spectroscopic analysis revealed some very large beta-phosphorus hyperfine splittings (i.e. in excess of 5 mT). For this reason and their remarkable stability (persistence) some of these nitroxides show promise as integral components in new, improved weak-field dynamic nuclear polarization (DNP) magnetometers
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Cyclic N-Oxides
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|a Hydroxylamines
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|a Nitrogen Oxides
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|a Organometallic Compounds
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|a Organosilicon Compounds
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|a Phosphorus Compounds
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|a nitrones
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|a Phosphorus
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|a 27YLU75U4W
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|a phenyl-N-tert-butylnitrone
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|a 5,5-dimethyl-1-pyrroline-1-oxide
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|a nitroxyl
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|a Silicon
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|a Janzen, Edward G
|e verfasserin
|4 aut
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|a Robinson, Valerie J
|e verfasserin
|4 aut
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|a Hrvoic, Ivan
|e verfasserin
|4 aut
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 42(2004), 10 vom: Okt., Seite 835-43
|w (DE-627)NLM098179667
|x 0749-1581
|7 nnns
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| 773 |
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|g volume:42
|g year:2004
|g number:10
|g month:10
|g pages:835-43
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|d 42
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