Novel C–H activation and C–S formation reactions on disulfide and diselenide ligands in dinuclear ruthenium complexes

Ring Expansion versus exo−endo Isomerization in (2-Pyridyl)methylenecyclobutane Coordinated to Hydrido(trispyrazolyl)borate- and Cyclopentadienyl-Osmium Complexes

“…Alkylidenecyclobutanes are a class of moderately strained alkenes, which have an extremely limited transition metal chemistry and have received significantly less attention than their three-membered counterparts in organic synthesis . The results reached with alkylidenecyclopropanes prompted us to investigate the reactions of the [OsTp(P i Pr 3 )] + and [OsCp(P i Pr 3 )] + metal fragments with (2-pyridyl)methylenecyclobutane (Scheme ).…”

C–H Activation by a Diselenido Dinickel(II) Complex

“…Metal-selenide C−H activation is rarely seen across the periodic table and unprecedented for nickel. 6 The reaction of elemental selenium with the nickel(I) complex 7 [Ni(Me 4 [12]aneN 4 )CO]PF 6 resulted in a rapid color change from light green to dark brown. Recrystallization lead to isolation of the diselenido dinickel(II) complex, {[(Ni-(Me 4 [12]aneN 4 )] 2 (μ-η 2 :η 2 -Se 2 )}(PF 6 ) 2 (1) in 70% yield (see Supporting Information for synthetic and spectroscopic details).…”

“…The resulting diselenido dinickel(II) complex exhibits the capacity to activate C–H bonds, a transformation of potential synthetic utility. Metal-selenide C–H activation is rarely seen across the periodic table and unprecedented for nickel …”

Reactivity of bis(ferrocenyl)ethynylthioether towards triruthenium dodecacarbonyl

“…Studies on cleavage and formation of S-C bonds in the presence of transition metal complexes are of interest due to their implications in the hydrodesulfurization processes (HDS) [1][2][3][4] and syntheses of organosulfur compounds, respectively [5]. Also, the activation of S-C bonds followed by C-C coupling reactions in alkynylthioethers may be used as strategy to form unsaturated polycarbon chains [6].…”