126823-27-6Relevant articles and documents
Reactions of HC≡CCMe2NHCOR alkynes with M3(CO)12 carbonyls (M = Ru, R = C6H9, Ph; M = Os, R = C6H9). Synthesis and crystal structure of Ru4(CO)11(HC≡CCMe2NHCOC6H 9), a butterfly cluster showing an interaction between a wingtip metal and the amide CO
Predieri, Giovanni,Tiripicchio, Antonio,Camellini, Marisa Tiripicchio,Costa, Mirco,Sappa, Enrico
, p. 1729 - 1734 (2008/10/08)
The alkynes HC≡CCMe2NHCOR react with M3(CO)12 (M = Ru or Os) giving, upon oxidative addition, the expected hydrides (μ-H)M3(CO)9(μ3-η 2-C≡CCMe2NHCOR) and the unprecedented butterfly clusters M4(CO)11(μ4-η2-Hc≡CCMe 2NHCOR). These complexes have been characterized by spectroscopic studies; the structure of the ruthenium butterfly cluster with R = C6H9 has been determined by X-ray diffraction methods. Crystals, containing CHCl3 as solvation molecules, are triclinic with Z = 2 in a unit cell of dimensions a = 13.521 (6), b = 14.617 (6), c = 9.049 (5) A?, α = 79.28 (2), β = 108.79 (2), γ = 111.85 (2)°. The structure has been solved from diffractometer data by direct and Fourier methods and refined by full-matrix least-squares to R = 0.0425 for 4586 observed reflections. The organic ligand interacts with all the metals of the butterfly cluster in μ4-η2 fashion through the alkyne moiety and with a wingtip metal through the amide CO group. Evidence has been obtained for the formation of the butterfly clusters via metal fragment condensation on the HM3(CO)9(C≡CCMe2NHCOR) clusters, which may be obtained in a retrosynthetic pattern via protonation of the butterfly derivatives.
