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Efficient Metathesis of Terminal Alkynes

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Abstract

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Now even terminal: The 2,4,6-trimethylbenzylidyne complexes [MesC[TRIPLE BOND]M{OC(CF3)2Me}3] (M=Mo, W) were synthesized from [Mo(CO)6] and [W(CO)6], respectively. The molybdenum complex is an efficient catalyst for the metathesis of internal and terminal alkynes and also for the ring-closing metathesis of internal and terminal α,ω-diynes at room temperature and low catalyst concentrations.

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