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. 2023 Aug 8;52(31):10905-10910.
doi: 10.1039/d3dt01847d.

Photochemically generated reactive sites at ruthenium/gallium complexes: catalysis vs. cluster growth

Raphael Bühler  1 , Maximilian Muhr  1 , Johannes Stephan  1 , Robert A Wolf  1 , Max Schütz  1 , Christian Gemel  1 , Roland A Fischer  1
Affiliations

Photochemically generated reactive sites at ruthenium/gallium complexes: catalysis vs. cluster growth

Raphael Bühler et al. Dalton Trans. .

Abstract

Irradiation of [Ru(GaCp*)3(SiEt3)H3] (1) at 350 nm induces reductive elimination of dihydrogen and triethylsilane and generates unsaturated Ru/Ga species. This photochemically induced cascading reductive elimination processes generate the reactive intermediate [Ru(GaCp*)3], which can be trapped by diphosphine coordination to yield the stable complex [(dppe)Ru(GaCp*)3] (4). The photochemically generated RuGa3 species is catalytically active in the hydrogenation of alkynes, which is further investigated by 1H NMR and mass spectrometry. Formation of intermetallic Ru/Ga clusters is observed as a competing and for the catalytic activity of the species limiting side reaction.

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