Oxidation, reduction, and copper-carbon bond formation in the reactions of copper(II) tetraglycine with pulse radiolytically generated free radicals
- Ben Gurion Univ., Negev, Israel
The reactions of copper(II) tetraglycine (Cu/sup II/G/sub 4/) with a variety of aliphatic free radicals and with .Br/sub 2//sup -/ and .OH have been investigated by the pulse radiolytic technique. Three types of reaction are observed: (i) oxidation of Cu/sup II/G/sub 4/ to Cu/sup III/G/sub 4/ by .Br/sub 2//sup -/ and .OH; (ii) rapid reduction to copper(I) by .CH/sub 2/OH, .CO/sub 2//sup -/, and (CH/sub 3/)/sub 2/COH; (iii) formation of unstable copper(III)-carbon-bonded intermediates with lifetimes from several milliseconds to several seconds with .CH/sub 2/C(CH/sub 3/)/sub 2/OH, .CH/sub 2/CO/sub 2//sup -/, and .CH/sub 2/C(OH)CH/sub 3/ radicals. Rate constants are reported for formation and decomposition of all intermediates, and the relative instability of neutral Cu/sup III/(H/sub -2/G/sub 4/) compared to Cu/sup III/(H/sub -3/G/sub 4/)/sup -/ is confirmed by direct observation.
- OSTI ID:
- 5183469
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 19:5; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400600* -- Radiation Chemistry
AMINO ACIDS
BROMINE
CARBOXYLIC ACIDS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
COPPER COMPOUNDS
DATA
DATA FORMS
DECOMPOSITION
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EXPERIMENTAL DATA
FERMIONS
GLYCINE
HALOGENS
HYDROXYL RADICALS
INFORMATION
ISOLATED VALUES
KINETICS
LEPTONS
NONMETALS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
OXIDATION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
REACTION KINETICS
REDUCTION
TRANSITION ELEMENT COMPOUNDS