Electric Literature of 15804-19-0, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 15804-19-0, Quinoxaline-2,3(1H,4H)-dione, introducing its new discovery.
Complexes [Fe2(mu-S2Ar)(CO)6] (S2Ar) = benzene-1,2-dithiolate (1a) toluene-3,4-dithiolate (2a), 3,6-dichloro-1,2-benzenedithiolate (3a), quinoxaline-2,3-dithiolate (7a) have been prepared to investigate the electronic effect that different bridging arenedithiolate ligands have on the appended Fe2(CO)6 sites. Dinuclear complexes [Fe2(mu-S2Ar)(CO)4(PMe3)2] (1-3,7)b and mononuclear complexes [Fe(S2Ar)(CO)2(PMe3)2] (1-3,7)c were synthesized from their parent hexacarbonyl complexes (1-3,7)a. IR spectroscopic, crystallographic and electrochemical analyses show that an increase of the electron-withdrawing character (where quinoxaline-2,3-dithiolate > 3,6-dichloro-1,2-benzenedithiolate > 1,2-benzenedithiolate ? toluene-3,4-dithiolate) of the bridging ligand leads to a decreased electron density at the iron centers, which yield a milder reduction potential and higher eCO stretching frequencies. This effect is coherent for all of the investigated complexes. Electrocatalytic proton reduction by complex 3a (with trifluoromethanesulfonic acid) was evidenced by cyclic voltammetry. As a result of the milder reduction potential of 3a itself, proton reduction that is promoted by 3a proceeds at a potential that is milder than that for the 1a-catalyzed process.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Electric Literature of 15804-19-0. In my other articles, you can also check out more blogs about 15804-19-0
Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N391 | ChemSpider