A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 13362-78-2, Name is (E)-1,2-Di(pyridin-4-yl)ethene, molecular formula is C12H10N2. In an article, author is Bruch, Quinton J.,once mentioned of 13362-78-2, Name: (E)-1,2-Di(pyridin-4-yl)ethene.
Dinitrogen Reduction to Ammonium at Rhenium Utilizing Light and Proton-Coupled Electron Transfer
The direct scission of the triple bond of dinitrogen (N-2) by a metal complex is an alluring entry point into the transformation of N-2 to ammonia (NH3) in molecular catalysis. Reported herein is a pincer-ligated rhenium system that reduces N-2 to NH3 via a well-defined reaction sequence involving reductive formation of a bridging N-2 complex, photolytic N-2 splitting, and proton-coupled electron transfer (PCET) reduction of the metal nitride bond. The new complex (PONOP)ReCl3 (PONOP = 2,6-bis(diisopropylphosphinito)pyridine) is reduced under N-2 to afford the trans,trans-isomer of the bimetallic complex RPONOP)ReCl2](2)(mu-N-2) as an isolable kinetic product that isomerizes sequentially upon heating into the trans,cis and cis,cis isomers. All isomers are inert to thermal N-2 scission, and the trans,trans-isomer is also inert to photolytic N-2 cleavage. In striking contrast, illumination of the trans,cis and cis,cis-isomers with blue light (405 nm) affords the octahedral nitride complex cis-(PONOP)Re(N)Cl-2 in 47% spectroscopic yield and 11% quantum yield. The photon energy drives an N-2 splitting reaction that is thermodynamically unfavorable under standard conditions, producing a nitrido complex that reacts with SmI2/H2O to produce a rhenium tetrahydride complex (38% yield) and furnish ammonia in 74% yield.
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Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem