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THE HABER‐WEISS CYCLE
Author(s) -
Koppenol Willem H.,
Butler John,
Leeuwen Johan W. van
Publication year - 1978
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1978.tb06989.x
Subject(s) - chemistry , atomic orbital , radiolysis , reaction rate constant , nitrogen , hydrogen peroxide , electron transfer , molecular orbital , hydrogen , oxygen , reaction rate , photochemistry , electron , medicinal chemistry , kinetics , catalysis , molecule , physics , organic chemistry , aqueous solution , quantum mechanics
— The Haber‐Weiss cycle:was investigated at low pH by radiolysis of oxygen or nitrogen saturated solutions of hydrogen peroxide. It was found that reaction 2 has a low rate constant: k 2 = 3.0 ± 0.6 M ‐1 s ‐1 (pH 2.3, 22°C). The rate determining step of reaction 2 is most probably the transfer of an electron from a π 8 * orbital of HO 2 to the empty s̀ u * orbital of H 2 O 2 . Overlap between these two orbitals is hindered by the filled π 8 * orbitals of H 2 O 2 . Fe(HI)EDTA catalyses reaction 2.