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Direct Observation of Intermediates in the Reaction of Peroxynitrite with Carbon Dioxide
Author(s) -
Meli Roger,
Nauser Thomas,
Koppenol Willem H.
Publication year - 1999
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/(sici)1522-2675(19990505)82:5<722::aid-hlca722>3.0.co;2-#
Subject(s) - chemistry , peroxynitrite , carbon dioxide , photochemistry , organic chemistry , enzyme , superoxide
Peroxynitrite (ONOO − , oxoperoxonitrate(1−)) reacts with carbon dioxide to form an adduct that absorbs with a maximum at 640 nm and an extinction coefficient of ca . 2 × 10 2 M −1 cm −1 . Within 0.1 s at 4°, this absorption decreases while the maximum is shifted to lower wavelengths, which indicates that trioxocarbonate(1−) radicals (CO 3 . − ) are formed. This interpretation is supported by the observation of a weak ESR signal at g =2.013.