The reaction of Ru5(CO)15(μ5-C) 1, with triethylsilane in the presence of UV-vis irradiation has yielded two new cluster complexes: Ru5(CO)14(SiEt3)(μ5-C)(μ-H), 2, in 11% yield and Ru5(CO)15(SiEt3)(μ5-C)(μ-H), 3, in 4% yield. Compound 2 can be converted to 3 in 89% yield under an atmosphere of CO at 25 °C. Compound 3 is converted back to 2 when heated to 97 °C. Compounds 2 and 3 were both characterized by single-crystal X-ray diffraction analyses. Compound 2 contains a square pyramidal cluster of five ruthenium atoms with a μ5-carbido ligand. The SiEt3 ligand is coordinated to one of the basal ruthenium atoms. The Ru-Ru bond from this ruthenium atom to the apical ruthenium atom is unusually long at 3.1353(8) Å. Compound 3 contains an open Ru5(μ5-C) cluster where one ruthenium atom bridges a butterfly arrangement of four ruthenium atoms. The silyl group is bonded to the bridging ruthenium atom, and the hydride ligand bridges the hinge bond of the butterfly.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry