In 2022,Li, Rongrong; Yang, Xinzheng; Ping, Hongming published an article in Catalysis Science & Technology. The title of the article was 《A radical mechanism for C-H bond cross-coupling and N2 activation catalysed by β-diketiminate iron complexes》.Related Products of 33100-27-5 The author mentioned the following in the article:
Our d. functional theory calculations reveal a radical mechanism for N2 fixation and conversion to N(SiMe3)3 and PhN(SiMe3)2 catalyzed by a diketiminate-supported iron system. We found that the Na(15-crown-5) radical plays an essential role as a co-catalyst in the reaction for the formation of the Me3Si radical and a stable intermediate. The attack of two Me3Si· radicals to distal nitrogen and the Ph migration to proximal nitrogen gradually weaken and activate the NN bond. The turnover-limiting step in the whole catalytic reaction is the activation of the C-H bond with a free energy barrier of 20.3 kcal mol-1. MO anal. of dinitrogen complexes indicates that the π back-bonding interactions between iron and N2 orbitals have major contributions to N2 fixation. In the experiment, the researchers used many compounds, for example, 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Related Products of 33100-27-5)
1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Related Products of 33100-27-5
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem