The oxidation of trans-stilbene, phenylacetylene, and diphenylacetylene by TI(0Ac)s in aqueous acetic acid medium in the presence of HC104 follows the rate law The formation constants K for the Ru(II1)-alkene a complex at 40,50, and 60°C are 90.14M-', 105.2M-l, and 127.7M-l, respectively. Interestingly the oxidation of phenylacetylene and diphenylacetylene does not undergo catalysis by Ru(II1). The mechanism involving the metal-arene K complex is discussed.
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