20.500.12556/RUL-174627 Identifying the true catalyst a Mn(II) salt versus Mn(II) complexes in epoxidation with m-chloroperbenzoic acid The oxidant meta-chloroperbenzoic acid (m-CPBA) is used widely for the epoxidation of alkenes, yet its efficiency is often limited under ambient conditions. This study investigates the catalytic activity of a Mn(II) salt and mononuclear Mn(II) complexes, two of which are reported here for the first time, in the epoxidation of alkenes with m-CPBA under ambient conditions. Time-resolved Raman spectroscopy is used to monitor substrate conversion, oxidant consumption, and product formation. The data reveal that simple Mn(II) salts exhibit significantly higher catalytic activity than Mn(II) complexes, indicating that ligand coordination inhibits the reactivity of the manganese center. The catalytic efficiency of Mn(II) perchlorate is particularly notable, achieving near-complete oxidation of styrene within minutes under mild conditions. Furthermore, epoxidation of a range of alkenes demonstrates that Mn(II) salts provide broad substrate scope and high selectivity. These findings suggest that simple Mn(II) salts can serve as highly efficient and cost-effective catalysts in alkene epoxidations with m-CPBA. catalysis epoxidations manganese perbenzoic acid Raman spectroscopy kataliza epoksidacije mangan peroksibenzojska kislina Ramanska spektroskopija true false true Angleški jezik Slovenski jezik Članek v reviji 2025-10-08 04:36:53 2025-10-08 14:06:02 2025-11-25 03:48:58 0000-00-00 00:00:00 2025 0 0 9 str. iss. 30, art. e202500432 Vol. 28 19 Aug. 2025 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 2025-08-19 546.712:544.47 1434-193X 10.1002/ejoc.202500432 251610371 RAZ_Savic_Milica_2025.pdf RAZ_Savic_Milica_2025.pdf 1 26E2A9D0628930E3762E0376CD94152A 460a8e6ddc2cd6a7ee6a1df5bc890db2fd7615607ea66208af096dca85747afa c00c8607-a434-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=219542 https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/ejoc.202500432 1 6bee9ea4-a3ef-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=219475 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0