Abstract

A novel ionic compound (3, [RuCl4(L)2]3PW12O40) containing the Ru(III)-complex cation and α-Keggin-type phosphotungstate anion was synthesized and proven to be the efficient catalyst for aerobic oxidations of alcohols free of base and nitroxyl radical. Specially, 3 could be reused at least five runs without obvious activity loss. The stability of 3 was dramatically improved due to the incorporation of [PW12O40]3 − as the counter-anions, leading to its available recyclability.

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