Syntheses of new ruthenium clusters containing sulfur, ynyl and diynyl ligands. Crystal structures of [Ru3(CO)9(µ-η2-SCCSiMe3)(µ3-η2-CCSiMe3)], [Ru4(CO)12(µ4-S)(µ-η2-CCSiMe3)2] and [Ru4(CO)9(µ-CO)2(µ4-S)(µ4-η2-C(SiMe3)C(CCSiMe3)]

Abstract

3 )] 5. All compounds have been characterized by IR and NMR techniques as well as FAB ϩ mass spectrometry. Crystal structures of 1, 4, and 5 have been determined by X-ray diffraction methods. The pathways of the thermolysis of 1 to give 2-5 have been investigated.

Activation of C−S Bonds in Organosulfur Compounds Containing α,β‐Unsaturated Ketone Systems by Carbonylruthenium and ‐iron Complexes

“…[3,12] Although compounds [Ru 4 (CO) 10 (µ 4 ,η 2 -CϭCHiPr)(OR)(PPh 2 )] (R ϭ H, Et) [7] and [Fe 4 (CO) 12 {µ 4 ,η 2 -CϭC(OMe)R}] (R ϭ OMe, Me) [9a] show a butterfly geometry, a rhombus frame has been observed in the compound [Os 4 (CO) 12 (µ 3 -S){µ 4 ,η 2 -Cϭ C(Ph)H}].…”

“…The remaining vinylidene group is coordinated to the four metal atoms at the C-α atom while the C-β atom is only attached to the Ru (2) (7) and 2.4337 (7) Å ] [3] and…”

“…[1] The activation of SϪC bonds is known in the synthesis of sulfur cluster compounds. [2] We have previously reported [3] that the reaction between Ru 3 (CO) 12 and S(CϵCSiMe 3 ) 2 affords two compounds [Ru 3 (CO) 9 (µ,η 2 -SCϵCSiMe 3 )-(µ 3 ,η 2 -CϵCSiMe 3 )] and [Ru 4 (CO) 9 (µ-CO) 2 (µ 4 -S)(µ 4 ,η 2 -C(SiMe 3 )C(CϵCSiMe 3 )] by cleavage of one or two of the SϪC bonds in the sulfide ligand.…”

Nickel(II)–PPh3 Complexes of S,N‐Substituted Thiosemicarbazones – Structure, DFT Study, and Catalytic Efficiency

“…Here, we present new nickel(II)-PPh 3 complexes with ONSor ONN-chelating 2-hydroxyacetophenone thiosemicarbazones 4 -methyl-substituted thiosemicarbazidato ligand, are reported. The complexes crystallize in the monoclinic space group P2 1 /n, and the nickel centers have a distorted squareplanar environment.…”

“…[1,2] Furthermore, a number of metal complexes with phosphine ligands have been found to catalyze carbon-carbon bond formation. [3][4][5][6] These complexes are generally homogeneous catalysts and find use in Heck [7] and Suzuki [8] reactions, among others. In recent years, many mixed-ligand complexes of biologically important chelating agents having triphenylphosphine as co-ligand have been reported.…”