ISSN:
1572-9729
Keywords:
halobenzoates
;
halobenzenes
;
halophenols
;
haloanilines
;
halophenoxyacetates
;
halobiphenyls
;
halodibenzo-p-dioxins
;
halodibenzofurans
;
hydrolytic dehalogenation
;
oxidative dehalogenation
;
reductive dehalogenation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Energy, Environment Protection, Nuclear Power Engineering
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Due to their persistence, haloaromatics are compounds of environmental concern. Aerobically, bacteria degrade these compounds by mono- or dioxygenation of the aromatic ring. The common intermediate of these reactions is (halo)catechol. Halocatechol is cleaved either intradiol (ortho-cleavage) or extradiol (meta-cleavage). In contrast to ortho-cleavage, meta-cleavage of halocatechols yields toxic metabolites. Dehalogenation may occur fortuitously during oxygenation. Specific dehalogenation of aromatic compounds is performed by hydroxylases, in which the halo-substituent is replaced by a hydroxyl group. During reductive dehalogenation, haloaromatic compounds may act as electron-acceptors. Herewith, the halosubstituent is replaced by a hydrogen atom.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00058837
Permalink