Search results
Results from the WOW.Com Content Network
A hydrogen-donor solvent is hydrocarbon that transfers hydrogen to hydrogen-poor substrates, such as coal.The hydrogen-poor substrates could be a solute or suspension. The classic hydrogen-donor solvent (or just donor solvent) is tetrahydronaphthalene, [1] which converts to naphthalene by transfer of two equivalents of H 2 to the substrate.
Organocatalytic transfer hydrogenation has been described by the group of List in 2004 in a system with a Hantzsch ester as hydride donor and an amine catalyst: [12] In this particular reaction the substrate is an α,β-unsaturated carbonyl compound. The proton donor is oxidized to the pyridine form and resembles the biochemically relevant ...
This page was last edited on 9 June 2009, at 17:36 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply ...
In a hydrogen bond, the electronegative atom not covalently attached to the hydrogen is named the proton acceptor, whereas the one covalently bound to the hydrogen is named the proton donor. This nomenclature is recommended by the IUPAC. [6] The hydrogen of the donor is protic and therefore can act as a Lewis acid and the acceptor is the Lewis ...
Gaseous hydrogen is produced industrially from hydrocarbons by the process known as steam reforming. [2] For many applications, hydrogen is transferred from donor molecules such as formic acid, isopropanol, and dihydroanthracene. [3] These hydrogen donors undergo dehydrogenation to, respectively, carbon dioxide, acetone, and anthracene.
Tetralin is used as a hydrogen-donor solvent, for example in coal liquifaction.It functions as a source of H 2, which is transferred to the coal.The partially hydrogenated coal is more soluble.
Thioureas are often found to be stronger hydrogen-bond donors (i.e., more acidic) than ureas [7] because their amino groups are more positively charged. Quantum chemical analyses revealed that this counterintuitive phenomenon, which is not explainable by the relative electronegativities of O and S, results from the effective steric size of the ...
Organotrophs use organic compounds as electron/hydrogen donors. Lithotrophs use inorganic compounds as electron/hydrogen donors.. The electrons or hydrogen atoms from reducing equivalents (electron donors) are needed by both phototrophs and chemotrophs in reduction-oxidation reactions that transfer energy in the anabolic processes of ATP synthesis (in heterotrophs) or biosynthesis (in autotrophs).