A cationic ruthenium carbyne complex was prepared and was found to initiate olefin metathesis reactions with good activities, which throws a new light on the design of a new type of ruthenium catalyst for RCM reactions. More importantly, no double bond isomerized by-product was observed even at elevated temperatures in reactions catalyzed by the new carbyne complex. A mechanism involving the in situ conversion of the ruthenium carbyne to a ruthenium carbene complex via addition of an iodide to the carbyne carbon was also proposed.

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A Unique Ruthenium Carbyne Complex: A Highly Thermo-Endurable Catalyst for Olefin Metathesis. -This is the first ruthenium-carbyne catalyst capable of catalyzing ring-closing metathesis reactions. No double-bond isomerization products are found even at elevated temperatures. -(SHAO, M.; ZHENG, L.; QIAO, W.; WANG, J.; WANG*, J.; Adv. Synth. Catal. 354 (2012) 14-15, 2743-2750, http://dx.

Ligands: Synthesis, Structure, Catalytic Investigation, and DFT Study on Initiation Mechanism. -(LIU*, G.; ZHENG, L.; SHAO, M.; ZHANG, H.; QIAO, W.; WANG, X.; LIU, B.; ZHAO, H.; WANG, J.; Tetrahedron 70 (2014) 32, 4718-4725, http://dx.