5,7 -二溴-8-羟基喹啉锰配合物催化H2O2 选择氧化乙苯

doi:10.3866/PKU.WHXB20100936

Abstract

Abstract:

Two 5,7-dibromo-8-quinolinolato manganese complexes in tetradentate (Q₂Mn^II) and hexadentate (Q₃Mn^III) modes were prepared and then characterized by Fourier transform infrared (FT-IR) spectrometry. We found that both Mn complexes, together with NH₄OAC and HOAc, efficiently catalyzed the oxidation of ethylbenzene to acetophenone by hydrogen peroxide in an acetone -water medium at 20 ^oC. Q₃Mn^IIIshowed much higher catalytic activity for this reaction thanQ₂Mn^II, affordinga 27% ethylbenzene conversion and more than 95% selectivity for acetophenone under optimum conditions.Q₃Mn^IIIwas reused three times without significant deactivation, indicating good stability.

Key words: 5,7-Dibromo-8-guinolinolato Mn(III) complex, Hexadentate mode, Ethylbenzene, Acetophenone, Selective oxidation

MSC2000:

O643

LU Chun-Li, FU Zai-Hui, LIU Ya-Chun, LIU Feng-Lan, QIN Jin-Wei, HE Xiang-Ling, YIN Du-Lin. Selective Oxidation of Ethylbenzene with Hydrogen Peroxide Catalyzed by 5,7-Dibromo-8-quinolinolato Manganese Complexes[J].Acta Phys. -Chim. Sin., 2010, 26(10): 2705-2710.

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Selective Oxidation of Ethylbenzene with Hydrogen Peroxide Catalyzed by 5,7-Dibromo-8-quinolinolato Manganese Complexes

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