Lifetime of Veratryl Alcohol Radical Cation Electrogenerated in Acetonitrile

2004 ◽  
Vol 33 (4) ◽  
pp. 408-409 ◽  
Author(s):  
Shin-ya Kishioka ◽  
Akifumi Yamada
Keyword(s):  
Radical Cation ◽  
Veratryl Alcohol ◽  
Alcohol Radical

The mediation of veratryl alcohol in oxidations promoted by lignin peroxidase: the lifetime of veratryl alcohol radical cation

2002 ◽  
Vol 293 (2) ◽  
pp. 832-835 ◽  
Author(s):  
Enrico Baciocchi ◽  
Massimo Bietti ◽  
Maria Francesca Gerini ◽  
Osvaldo Lanzalunga
Keyword(s):  
Radical Cation ◽  
Lignin Peroxidase ◽  
Veratryl Alcohol ◽  
Alcohol Radical

scholarly journals Lifetime and Reactivity of the Veratryl Alcohol Radical Cation.

1995 ◽  
Vol 270 (28) ◽  
pp. 16745-16748 ◽  
Author(s):  
Luis P. Candeias ◽  
Patricia J. Harvey
Keyword(s):  
Radical Cation ◽  
Veratryl Alcohol ◽  
Alcohol Radical

Oxygen Acidity of 1-Arylalkanol Radical Cations. 4-Methoxycumyloxyl Radical as −C(Me)2−O--to-Nucleus Electron-Transfer Intermediate in the Reaction of 4-Methoxycumyl Alcohol Radical Cation with OH-

1998 ◽  
Vol 120 (44) ◽  
pp. 11516-11517 ◽  
Author(s):  
Enrico Baciocchi ◽  
Massimo Bietti ◽  
Osvaldo Lanzalunga ◽  
Steen Steenken
Keyword(s):  
Electron Transfer ◽  
Radical Cation ◽  
Radical Cations ◽  
Alcohol Radical

The role of peroxidases, radical cations and oxygen in the degradation of lignin

1987 ◽  
Vol 321 (1561) ◽  
pp. 495-505 ◽  
Keyword(s):  
Radical Cation ◽  
Active Oxygen Species ◽  
Bond Cleavage ◽  
White Rot Fungi ◽  
Radical Cations ◽  
Veratryl Alcohol ◽  
White Rot ◽  
Oxygen Species ◽  
Lignin Model

Ligninase is an extracellular peroxidase produced by several species of white-rot fungi. It is able to oxidize methoxylated substrates to radical cation intermediates that can undergo C—H or C—C bond cleavage, thereby providing the basis for the oxidation of veratryl alcohol or degradation of lignin model compounds respectively. In some cases, the radical cation intermediate can act as an oxidant, accepting an electron from a suitable donor. It can thus function as a mediator, causing oxidation in a polymer not immediately accessible to the enzyme. This could be important in the degradation of natural lignocellulose substrates. However, the removal of a single electron by a mediator would leave a radical in the polymer. We propose that oxygen will bind to this radical to generate active oxygen species. This provides a potential mechanism for the auto-oxidation of lignin at a distance from the enzyme. A scheme is presented to account for the observation that ligninase can open the ring of veratryl alcohol.

Peculiarities of the synthesis, structure and properties of ET radical cation salts prepared in the presence of the rare-earth metal complex anions

2004 ◽  
Vol 114 ◽  
pp. 527-528 ◽  
Author(s):  
N. D. Kushch ◽  
A. V. Kazakova ◽  
L. I. Buravov ◽  
A. N. Chekhlov ◽  
E. B. Yagubskii
Keyword(s):  
Rare Earth ◽  
Metal Complex ◽  
Radical Cation ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Structure And Properties ◽  
Rare Earth Metal Complex ◽  
Radical Cation Salts ◽  
Complex Anions ◽  
The Rare Earth

The electronic properties of a radical cation salt of bis-ethylenedioxodibenzofuran, [(bEDODBF)5 (AsF6)2(CH2Cl 2)0.2]

1988 ◽  
Vol 49 (4) ◽  
pp. 667-673 ◽  
Author(s):  
S. Söderholm ◽  
J. Hellberg ◽  
G. Ahlgren ◽  
M. Krebs ◽  
J.U. von Schütz ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Radical Cation ◽  
Radical Cation Salt

Synthesis of a Condensed Phenoxazine Dimer and Its Radical Cation Salt

Synfacts ◽  
2020 ◽  
Vol 16 (12) ◽  
pp. 1421
Keyword(s):  
Radical Cation ◽  
Radical Cation Salt

Effects of Ultrasounds on Neat nitrobenzene

2019 ◽  
Vol 70 (8) ◽  
pp. 3085-3088
Author(s):  
Carmen Eugenia Stavarache ◽  
Yasuaki Maeda ◽  
Mircea Vinatoru
Keyword(s):  
Nitro Group ◽  
Radical Cation ◽  
Reaction Mechanisms ◽  
Diphenyl Ether ◽  
Argon Atmosphere ◽  
Phenyl Radical ◽  
Dissolved Gas ◽  
Decomposition Products ◽  
Oxygenated Compounds ◽  
Phenyl Cation

Neat nitrobenzene was continuously irradiated at two ultrasonic frequencies: 40 and 200 kHz, under air and argon atmosphere, respectively. Samples taken at intervals of 1, 5, 10 and 24 h were analyzed by GC-MS and decomposition products were identified. Possible reaction mechanisms are discussed. Presence of air as dissolved gas leads to oxygenated compounds such as 1,4-benzoquinone, 2,4-dinitrophenol, m-dinitrobenzene while argon inhibits the decomposition of nitrobenzene, especially at sonication times under 5 h. Based on the nature of the compounds identified we advanced a mechanism, involving a divergent splitting of unstable radical cation of NB in air and argon respectively. Thus, under air, the phenyl cation formation is preferred leading to 1,4-benzoquinone nitro-biphenyls and dinitrobenzene, while under argon, the phenyl radical formation seems to be favored, leading to phenol and diphenyl ether. The oxygenated compounds detected under argon clearly are a consequence of the nitro group splitting.

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