NMP and O₂ as Radical Initiator: Trifluoromethylation of Alkenes to Tertiary β‑Trifluoromethyl Alcohols at Room Temperature

A novel strategy was developed to trigger ·CF₃ by using <i>in situ</i> generated peroxide in NMP under O₂ or air as the radical initiator. Radical trifluoromethylation of alkenes was achieved toward tertiary β-trifluoromethyl alcohols. Various tertiary β-trifluoromethyl alcohols can be synthesized in good yields without extra oxidants or transition metal catalysts. Preliminary mechanistic investigation revealed that O₂ diffusion can influence the reaction rate

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14 juin 19231923/06/14 (A52).Appartient à l’ensemble documentaire : PoitouCh

Emergent Intrinsic Ferromagnetism in Two-Dimensional Trigonal Rhodium Oxide

Two-dimensional (2D) van der Waals single crystals with long-range magnetic order are the precondition and urgent task for developing a 2D spintronics device. In contrast to graphene and transition metal dichalcogenides, the study of 2D single-crystal metal oxides with intrinsic ferromagnetic properties remains a huge challenge. Here, we report a large-size trigonal single-crystal rhodium oxide (SC-Tri-RhO2), with crystal parameters of a = b = 3.074 Å, c = 6.116 Å, and a space group of P3̅m1 (164), exhibiting strong ferromagnetism (FM) at a rather high temperature. Furthermore, theoretical calculations suggest that the ferromagnetism in SC-Tri-RhO2 originates from spin splitting near the Fermi level, and the total magnetic moment is contributed mainly by the Rh atom