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Updated: Jul 24, 2025

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
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Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

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洞察背后的机制Dehalococcoides mccartyi菌株CBDB1-介导B12-依赖芳香降解脱化

Shangwei Zhang1,2,3, Wu Wen4, Xinghui Xia3

  • 1Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai 519087, China.

Environmental science & technology
|July 10, 2023
PubMed
概括

厌氧细菌使用维生素B12从芳香化合物中去除素. 一项新的量子化学研究揭示了一种合质子的两电子转移机制是这种脱过程的关键途径.

关键词:
德哈洛科科伊德 (Dehalococcoides) 是一种除类植物.芳香化物 有机化物反应机制的反应机制.降低性脱化降低性脱化热力学 热力学 热力学

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Benzene to 1,4-Cyclohexadiene: Birch Reduction Mechanism

Birch reduction uses solvated electrons as reducing agents. The reaction converts benzene to 1,4-cyclohexadiene. The reaction proceeds by the transfer of a single electron to the ring to form a benzene radical anion. This anion is highly basic—it abstracts a proton from the alcohol to form a cyclohexadienyl radical. Another single electron transfer gives the cyclohexadienyl anion. A proton transfer from the alcohol forms 1,4-cyclohexadiene. Since this reduction occurs via radical anion...
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Nucleophilic Aromatic Substitution: Elimination–Addition

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Acid halides are reduced to alcohols in the presence of a strong reducing agent like lithium aluminum hydride.
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
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