Related Products of 2920-38-9, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. 2920-38-9, Name is [1,1′-Biphenyl]-4-carbonitrile, SMILES is N#CC1=CC=C(C2=CC=CC=C2)C=C1, belongs to nitriles-buliding-blocks compound. In a article, author is Lv, Kang, introduce new discover of the category.
Mechanistic insights into the Rh(i)-catalyzed transannulation of 1,2,3-thiadiazoles with alkenes, alkynes, and nitriles: Does the intermediacy of alpha-thiavinyl Rh-carbenoids play an important role?
Density functional theory (DFT) calculations were performed to gain an in-depth mechanistic understanding of the Rh(i)-catalyzed transannulation of 1,2,3-thiadiazoles with alkenes, alkynes, and nitriles. Computational results indicate that the denitrogenation of 1,2,3-thiadiazoles promoted by the Rh(i) catalyst may not afford the commonly proposed alpha-thiavinyl Rh-carbenoid intermediate. Instead, the four-membered cyclometalated Rh(iii) complex is suggested to be the key intermediate, which could be formed via the cleavage of the S-N bond of 1,2,3-thiadiazoles to generate a six-membered cyclometalated Rh(iii) complex followed by N-2 extrusion. The easy chelation of the S atom with Rh is mainly responsible for the favorable formation of the four-membered cyclometalated Rh(iii) intermediate. Next, the substrates alkenes, alkynes, and nitriles could undergo migratory insertion with the four-membered rhodacycle followed by reductive elimination to furnish the corresponding products. The origins of divergent regioselectivities for the Rh(i)-catalyzed transannulation of 1,2,3-thiadiazoles with alkenes, alkynes, and nitriles are discussed, respectively, which are not only determined by the feasible migratory insertion pathway, but also by the feasibility of the subsequent reductive elimination.
Related Products of 2920-38-9, Consequently, the presence of a catalyst will permit a system to reach equilibrium more quickly, but it has no effect on the position of the equilibrium as reflected in the value of its equilibrium constant.I hope my blog about 2920-38-9 is helpful to your research.