Reactivity of bromine atom complexes with organic compounds

Journal Article · Thu Sep 06 00:00:00 EDT 1990 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100381a042· OSTI ID:5478615

Shoute, L C.T.; Neta, P ^[1]

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1. National Institute of Standards and Technology, Gaithersburg, MD (USA)

Complexes of bromine atoms with bromo compounds (C{sub 2}H{sub 5}Br{center dot}Br, CH{sub 2}Br{sub 2}{center dot}Br, CHBr{sub 3}{center dot}Br, and CBr{sub 4}{center dot}Br) were produced by pulse radiolysis of the corresponding bromoalkane dissolved in cyclohexane. With benzene as solvent, the complex C{sub 6}H{sub 6}{center dot}Br was produced. These complexes oxidized phenols to phenoxyl radicals and abstract reactive hydrogens from various compounds. Absolute rate constants for these reactions were determined by following the decay of the Br atom complexes (at 370, 390, 425, 480 and 540 nm, respectively) as a function of substrate concentration. The rate constants varied from 10{sup 5} to 10{sup 10} M{sup {minus}1} s{sup {minus}1} and were strongly dependent on the nature of the Br atom complex and of the organic substrate.

• OSTI ID: 5478615
• Journal Information: Journal of Physical Chemistry; (United States), Vol. 94:18; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
BROMINE COMPLEXES
ACTIVATION ENERGY
CHEMICAL REACTIONS
KINETICS
ORGANIC COMPOUNDS
RADICALS
RADIOLYSIS
SPECTROSCOPY
CHEMICAL RADIATION EFFECTS
COMPLEXES
DECOMPOSITION
ENERGY
RADIATION EFFECTS
400201* - Chemical & Physicochemical Properties
400600 - Radiation Chemistry