Recommanded Product: 4-AcetylpyridineIn 2019 ,《CoII Complexes with a Tripyridine Ligand, Containing a 2,6-Di-tert-butylphenolic Fragment: Synthesis, Structure, and Formation of Stable Radicals》 appeared in ACS Omega. The author of the article were Dorofeeva, Victoria N.; Pavlishchuk, Anna V.; Kiskin, Mikhail A.; Efimov, Nikolay N.; Minin, Vadim V.; Lytvynenko, Anton S.; Gavrilenko, Konstantin S.; Kolotilov, Sergey V.; Novotortsev, Vladimir M.; Eremenko, Igor L.. The article conveys some information:
Interaction of tripyridine ligand, bearing 2,6-di-tert-butylphenolic fragment (L, 2,6-di-tert-butyl-4-(3,5-bis(4-pyridyl)pyridyl)phenol) with CoII pivalate or chloride gave 1D coordination polymers [Co(L)Cl2]n·nEtOH (1) and [Co3(L)2(OH)(Piv)5]n (2) or trinuclear complex Co3(H2O)4(L)2Cl6 (3) (Piv- = pivalate). Chem. oxidation of L, 1-3 by PbO2 or K3[Fe(CN)6], as well as exposure of L (in solution or solid state) and 2 (in solid state) to UV-irradiation gave free radicals with g = 2.0024, which probably originated due to oxidation of 2,6-di-tert-butylphenolic groups. These radicals were stable during several days in solutions and more than one month in solid samples. Irradiation and oxidation of the solid samples probably caused formation of the phenoxyl radical only on their surface. It was shown by DFT calculations that exchange coupling between the unpaired electron of the phenoxyl and CoII ions were negligibly weak and could not affect EPR signal of the radical, as well as exchange coupling of CoII ions could not be transmitted by L. The latter conclusion was confirmed by the anal. of magnetic properties of 1: temperature dependency of magnetic susceptibility (χM) of 1 could be simulated by a simple model for isolated CoII ions.4-Acetylpyridine(cas: 1122-54-9Recommanded Product: 4-Acetylpyridine) was used in this study.
4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. The basicity and metallophilic high donor number of these π-deficient systems has long favored them as ligands in metal catalysis. The last decade saw pyridine assume a stronger role as functional group for directed C–H oxidation/activation.Recommanded Product: 4-Acetylpyridine