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Titolo:
INVESTIGATION OF THE DECOMPOSITION OF COMPOUNDS CONTAINING AZO GROUPSBY EPR SPECTROSCOPY
Autore:
STASKO A; ERENTOVA K; RAPTA P; NUYKEN O; VOIT B;
Indirizzi:
SLOVAK TECH UNIV,DEPT PHYS CHEM,RADLINSKEHO 9 SK-81237 BRATISLAVA SLOVAKIA TECH UNIV MUNICH,LEHRSTUHL MAKROMOL STOFFE D-85747 GARCHING GERMANY
Titolo Testata:
Magnetic resonance in chemistry
fascicolo: 1, volume: 36, anno: 1998,
pagine: 13 - 34
SICI:
0749-1581(1998)36:1<13:IOTDOC>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRON-SPIN-RESONANCE; RADICAL-ANIONS; PHOTOCHEMICAL DECOMPOSITION; PARAMAGNETIC-RESONANCE; CYCLIC AZOALKANES; TRIPLE-RESONANCE; FREON MATRICES; ESR; CATION; ENDOR;
Keywords:
EPR; ESR; AZO COMPOUNDS; FREE RADICALS; SPIN TRAP;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
54
Recensione:
Indirizzi per estratti:
Citazione:
A. Stasko et al., "INVESTIGATION OF THE DECOMPOSITION OF COMPOUNDS CONTAINING AZO GROUPSBY EPR SPECTROSCOPY", Magnetic resonance in chemistry, 36(1), 1998, pp. 13-34

Abstract

In photochemically, electrochemically and thermally initiated decomposition, compounds containing the azo group ((RN)-R-1=(NR)-R-2) usuallyform reactive, short-lived radicals R-1(.) and R-2(.) which corresponds to synchronous splitting. As examples, aliphatic azo compounds, 1-aryl-2-alkylazo compounds, azophosphonates, azosulfonates, azosulfones,azosulfides, triazenes, pentazadienes, hexazadienes, acyl- and diacylazo compounds, diazonium salts and cyclic azo compounds have been studied. R-1(.) and R-2(. ) Were characterized by means of the EPR spin trap technique. These reactive radicals may abstract hydrogen from the solvent or any neighborhood functions, or dimerize (R-1-R-2). Some azo compounds trap R-1(.) and R-2(.) and thus form the corresponding hydrazyl radicals. In cathodic reduction, prior to the initiation of decomposition, corresponding anion radicals centered on the azo group were observed which have considerable stability if R-1 and R-2 are conjugatedstructures. (C) 1998 John Wiley & Sons, Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 13:43:43