Methanol, anaerobic oxidation

Giiven D et al. (2005) Propionate oxidation by and methanol inhibition of anaerobic ammonium-oxidizing bacteria. Appl Environ Microbiol 71 1066-1071. 

ESR studies 112,114-118a) are also consistent with the formation of free radicals upon photolysis of alkylcobalamin and coenzyme Bi2- For example, Lappert and co-workers 116) demonstrated that homolysis of the cobalt-alkyl bond occurs upon photolysis of coenzyme B12 and ethylcobalamin by trapping the S -deoxyadenosyl and ethyl radicals produced with (CH3)3CN0. They were able to detect the spin-trapped (CH3)3CN(0)R radicals by ESR spectroscopy. Homolysis of the cobalt-methyl bond was also shown to occur upon anaerobic photolysis of methylcobalamin 117). However, the presence of traces of oxygen in the methanol solvent was shown to affect signiflcantly the photochemistry of methylcobalamin 118). Indeed, under those conditions, the 5,S-dimethyl-1-pyrroline iV-oxide (DMPO) spin adducts of both the methyl and hydrogen radicals, 113 and 114, respectively, were detected by ESR spectro-... 

Sprensen K. B., Finster K., and Ramsing N. B. (2001) Thermodynamic and kinetic requirements in anaerobic methane oxidizing consortia exclude hydrogen, acetate, and methanol as possible electron shuttles. Microbial. Ecol. 42, 1-10. 

Figure 7. Electrolytic oxidation of 2,6-dimethylphenol. Key O, poly(2,6-dimethyl phenylene oxide) , oligo(2,6-dimethyl phenylene oxide) (1, 2,2 6,6 -tetramethylbiphenoquinone, 0,1 M dimethylphenol in 20% methanol-dichloro-methane containing 0,2 M tetraethyl ammonium bromide, current density 10 mA/cm platinum counter electrodes with saturated calomel reference under anaerobic condition at room temperature.

The methane-producing bacteria derive their energy from the oxidation of simple organic corn-pounds such as methanol and acetate, or from molecular hydrogen. Methane is the reduced product of their metabolism. These are among the most strictly anaerobic organisms. They are responsible for swamp gas (methane) production in the... 

The ligand HL is air stable. HL reacts with methanol solution of CuBr2 in air to afford HOL, bis(2-picolinyl)ketone (bpk), and MeOL.7a With catalytic amount of CuBr2, the bridgehead oxidation is quantitative. Under anaerobic conditions, HL and CuBr2 react to give CuBr2(HL) quantitatively. 

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