Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 38-39, Pages 4425-4429Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201700361
Keywords
Carboranes; Manganese; Cobalt; Oxidation; Carboxylates
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Funding
- Spanish Ministerio de Economia y Competitividad [CTQ2015-66143-P, CTQ2016-75150-R]
- Generalitat de Catalunya [2014-SGR-149]
- Generalitat de Catalunya
- COST [CM 1302]
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This work presents the first examples of carboranylcarboxylate complexes as precatalysts in epoxidation reactions with the use of peracetic acid as the oxidant. The manganese [Mn(mu-H2O)(1-CH3-2-CO2-1,2-closo-C2B10H10)(2)](n)(H2O)(n) (1), [Mn-2(1-CH3-2-CO2-1,2-closo-C2B10H10)(4)(2,2'-bpy)(2)] (2, bpy = bipyridine), [Mn(1-CH3-2-CO2-1,2-closo-C2B10H10)(2)(bpm)](n) (3, bpm = bipyrimidine), and [Mn(1-CH3-2-CO2-1,2-closo-C2B10H10)(2)(2,2'-bpy)(2)] (4) complexes and the cobalt [Co-2(mu-H2O)(1-CH3-2-CO2-1,2-closo-C2B10H10)(4)(thf)(4)] (6) complex, all containing the carboranylcarboxylic 1-CH3-2-CO2H-1,2-closo-C2B10H10 (LH) ligand, together with Mn-3(OAc)(6)(2,2'-bpy)(2) (5) displayed good performance with high conversions and selectivity values in short reaction times, in most cases. This work highlights that the coordination of the carboranylcarboxylic ligand to the metal ions is crucial to the performance of the complexes as catalysts.
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