Hypervalent iron-oxo porphyrin cation radical formation on reaction of H2O2 with the cytochrome-c-derived haem octapeptide microperoxidase-8 (MP-8) in aqueous solution

1990 ◽  
pp. 97 ◽  
Author(s):  
Paul A. Adams ◽  
Richard D. Goold
Keyword(s):  
Aqueous Solution ◽  
Cytochrome C ◽  
Cation Radical ◽  
Radical Formation ◽  
Microperoxidase 8 ◽  
Porphyrin Cation

Observation of a radical intermediate in the one electron oxidation of 5-methyl-1-thia-5-azacyclooctane by •Br2−

1984 ◽  
Vol 62 (9) ◽  
pp. 1874-1876 ◽  
Author(s):  
Warren Kenneth Musker ◽  
Parminder S. Surdhar ◽  
Rizwan Ahmad ◽  
David A. Armstrong
Keyword(s):  
Aqueous Solution ◽  
Rate Constant ◽  
Half Life ◽  
Cation Radical ◽  
Order Rate Constant ◽  
Type Structure ◽  
Radical Intermediate ◽  
Text Type ◽  
First Order ◽  
The One

The one electron oxidant •Br2− reacts with 5-methyl-1-thia-5-azacyclooctane (4) in aqueous solution at high pH with an overall rate constant of ~2 × 108 M s−1. The radical intermediate produced has a broad maximum at 500 nm with ε = 2400 M−1 cm−1 and at pH 10 decays with a first order rate constant of 2.3 ± 0.3 × 104 s−1, first half-life of 30 ± 5 μs. Its characteristics do not correspond to those of the [Formula: see text] species reported by Asmus and co-workers. The species appears to be the same as the cation radical reported earlier in the one electron oxidation of 4 in acetonitrile. This species is considered to have an [Formula: see text] type structure, which provides transannular stabilization.

ChemInform Abstract: AMINE DIMER CATION RADICAL FORMATION UPON QUENCHING OF TRANS-STILBENE-AMINE EXCIPLEXES BY AMINES

1984 ◽  
Vol 15 (5) ◽  
Author(s):  
W. HUB ◽  
S. SCHNEIDER ◽  
F. DOERR ◽  
J. D. OXMAN ◽  
F. D. LEWIS
Keyword(s):  
Cation Radical ◽  
Radical Formation ◽  
Trans Stilbene

scholarly journals Conformational Degradation of Cytochrome-C by Gamma Irradiation in Aqueous Solution

1967 ◽  
Vol 8 (1) ◽  
pp. 14-19
Author(s):  
Kotaro YAMAUCHI ◽  
Takahiro MASUDA ◽  
Masaharu KONDO
Keyword(s):  
Aqueous Solution ◽  
Cytochrome C ◽  
Gamma Irradiation

10-Methylphenothiazine cation radical formation on alumina and silver or palladium doped alumina

1979 ◽  
Vol 10 (2) ◽  
pp. 113-117 ◽  
Author(s):  
A. Sh. Grigorian ◽  
K. C. Khulbe ◽  
R. S. Mann ◽  
P. D. Grover
Keyword(s):  
Cation Radical ◽  
Radical Formation

Triplet ESR spectrum of the copper porphyrin cation radical

1982 ◽  
Vol 104 (7) ◽  
pp. 2057-2059 ◽  
Author(s):  
S. Konishi ◽  
M. Hoshino ◽  
M. Imamura
Keyword(s):  
Cation Radical ◽  
Esr Spectrum ◽  
Copper Porphyrin ◽  
Porphyrin Cation
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