Scientists of the Zelinsky Institute have proved the participation of a “cocktail” type catalytic system in alkynes and alkenes hydrosilylation

The addition of molecules with a heteroatom-hydrogen bond to unsaturated compounds, catalyzed by transition metals, is an actively developing area of modern organic chemistry. Using this approach, it is possible to implement with high efficiency, as well as stereo- and regioselectivity, the formation of carbon-nitrogen, carbon-sulfur, carbon-phosphorus and other bonds. Particular attention in industry and organic chemistry is paid to the formation of a carbon-silicon bond in the hydrosilylation reaction of alkynes catalyzed by platinum complexes. This area continues to develop rapidly, but the high cost of platinum and the lack of stability of homogeneous catalysts based on it stimulate the search of heterogeneous catalysts that can be isolated and reused after the reaction. It should also be noted that the improvement of catalytic systems and the development of new generation catalysts require a deep understanding of the reaction mechanisms.

Scientists from the Laboratory of Metal Complex and Nanoscale Catalysts for the first time proved the participation of a "cocktail" type catalytic system in alkynes and alkenes hydrosilylation in the presence of carbon-supported platinum. Cocktail type catalysts are dynamic systems in which an equilibrium is observed between metal complexes, as well as their nanoparticles and clusters. During this research on the nature of the catalytic system, a number of modern physico-chemical methods of analysis were used, including high-resolution mass spectrometry and electron microscopy. The results obtained are of fundamental importance for the development of active, stable, and recyclable catalytic systems. The study of the reaction mechanism is of great importance for the development of catalytic systems based on a new generation catalyst in the hydrosilylation reaction.

Source:

Evgeniia E. Ondar, Julia V. Burykina, Valentine P. Ananikov Evidence for the “cocktail” nature of platinumcatalyzed alkyne and alkene hydrosilylation reactions Catal. Sci. Technol., 2022, accepted manuscript. DOI: 10.1039/d1cy02006d.