Hydrogen gas (H2) may be produced by the anoxic corrosion of steel components in underground structures, such as geological repositories for radioactive waste. In such environments, hydrogen was shown to serve as an electron donor for autotrophic bacteria. High gas overpressures are to be avoided in radioactive waste repositories and, thus, microbial consumption of H2 is generally viewed as ben...

In the title compound, C(10)H(16)N(2) (2+)·2HSO(4) (-), the S atoms adopt slightly distorted tetra-hedral geometry and the diprotonated piperazine ring adopts a chair conformation. In the crystal, the 1-phenyl-piperazine-1,4-diium cations are anchored between chains formed by the sulfate entities via inter-molecular bifurcated N-H⋯(O,O) and weak C-H⋯O hydrogen bonds. These hydrogen bonds contri...

In the cation of the title compound, C(7)H(9)BrN(+)·HSO(4) (-), the amino N atom is protonated. In the crystal, inter-molecular O-H⋯O and N-H⋯O hydrogen bonds generate an infinite two-dimensional network parallel to (001).

Acetate is a major product of fermentation processes and an important substrate for sulfate reducing bacteria and methanogenic archaea. Most studies on acetate catabolism by sulfate reducers and methanogens have used pure cultures. Less is known about acetate conversion by mixed pure cultures and the interactions between both groups. We tested interspecies hydrogen transfer and coexistence betw...

a highly efficient and environmentally friendly synthesis of various 1,5-diaryl-3-(arylamino)-1h-pyrrol-2(5h)-ones catalyzed by 1-methylpiperidinium hydrogen sulfate via one-pot cyclo-condensation reaction ofaldehydes, amines and ethyl 2-oxopropanoate under ambient conditions has been explored. the presentmethodology offers several advantages such as good yields, simple procedure, shorter react...

In the asymmetric unit of the title hydrated salt, 2C6H6N3 (+)·SO4 (2-)·2H2O, there are two independent sulfate ions, one lying on a twofold axis, and the other in a general position. There are three independent benzotriazolium cations and three independent water mol-ecules. The sulfate ion in a general position forms hydrogen-bonded chains of stoichiometry SO4 (2-)·3H2O in the b-axis direction...

Hydrolysis of pyrosulfate was studied by electrochemical experiments and quantum mechanical calculations, revealing Gibbs transfer energies for pyrosulfate, hydrogen sulfate anions at the liquid-liquid interface.

a mild and efficient method has been developed for the preparation of substituted coumarins from reaction of various phenols with different β-ketoesters via pechmann condensation in the presence of brønsted acidic ionic liquid (n-(4-sulfonic acid) butyl triethylammonium hydrogen sulfate) as an effective catalyst under solvent-free conditions. different phenols reacted with ethyl acetoacetate to...

a convenient and efficient direct protocol for the preparation of antibacterial azo dyes by the reaction of 2-naphthol with aromatic amines in the presence of catalytic amount of n-methyl-2-pyrrolidonium hydrogen sulfate ([h-nmp]hso4) was carried out under solvent free conditions. this method has some advantages such as: easy work-up and easy separation of catalyst from the reaction mixture. th...

a series of 2-amino pyridine-3-carbinitrile derivatives incorporated coumarin moiety has developed via multicomponent condensation of 3-acetyl-2h-chromen-2-one, arylaldehydes, malononitrile and ammonium acetate utilizing brønsted acidic ionic liquid, (4-sulfobutyl)tris(4-sulfophenyl)phosphonium hydrogen sulfate as catalyst under solvent-free conditions. good yields, short reaction times, straig...