91463-50-2Relevant academic research and scientific papers
Clusters containing a quadruply bridging CO ligand. Syntheses, crystal structures, and solution dynamics of CpWRu4(CO)14H and Cp*MRu4(CO)14H (M = Mo, W)
Su, Chi-Jung,Chi, Yun,Peng, Shie-Ming,Lee, Gene-Hsiang
, p. 4286 - 4293 (2008/10/09)
The pentametal carbonyl cluster compounds CpWRu4(CO)14(μ3-H) (4), Cp*MoRu4(CO)14-(μ3-H) (5), and Cp*WRu4(CO)14(μ3-H) (6) were obtained by condensation of Ru3(CO)12 with the corresponding anionic reagents [CpW(CO)3][PPN] and [Cp*M(CO)3][PPN] (M = Mo, W) in the ratio 3:2 in refluxing THF solution, followed by treatment with excess CF3CO2H in CH2Cl2 at room temperature. The Cp derivative 4 possesses a trigonal-bipyramidal Ru4W core in which the W atom is located at an equatorial position and the hydride lies on a WRu2 triangular face. In contrast, the Cp* derivatives 5 and 6 adopt an edge-bridged tetrahedral geometry with a tentacle Cp*M fragment bridging a Ru-Ru edge, on which the novel μ4-η2-CO ligand is associated with the local butterfly Ru3M array (M = Mo, W). The solution dynamics of these three cluster compounds are discussed.
Synthesis and reactivity of [PPh4][MRu3Cp(CO)12] clusters (M = Mo, W)
Cazanoue, Martine,Lugan, No?l,Bonnet, Jean-Jacques,Mathieu, René
, p. 2480 - 2486 (2008/10/08)
The clusters [PPh4][MRu3Cp(CO)12] (1a, M = Mo; 1b, M = W) have been synthesized in 70-75% yield by the reaction of [PPh4][MCp(CO)3] with Ru3(CO)12 in boiling THF. The structure of 1a has been established: monoclinic; space group C2h5-P21/c; a = 12.427 (2) ?, b = 13.637 (4) ?, c = 23.811 (4) ?; β = 86.02 (1)°; Z = 4. The reactivity of 1a,b toward H+, H2, and alkynes has been studied. The unstable complexes (μ-H)MRu3Cp(CO)12 (2a, M = Mo; 2b, M = W) have been obtained by protonation. Molecular hydrogen reacts with 1a,b in boiling THF to give [PPh4][(μ-H)2MRu3Cp(CO)11] (3a, M = Mo; 3b, M = W) in good yield. They are fluxional on the NMR time scale. The alkynes MeC≡CMe or PhC≡CH react with 1a,b in boiling THF to give respectively [PPh4][MRu3Cp(CO)10(μ4-η 2-MeC≡CMe)] (4a, M = Mo; 4b, M = W) and [PPh4][MRu3Cp(CO)10(μ4-η 2-PhC≡CH)] (5a, M = Mo; 5b, M = W). The structure of 4b has been determined at -150°C: triclinic; space group Ci1-P1; a = 14.035 (2) ?, b = 14.818 (5) ?, c = 10.311 (3) ?; α = 98.70 (3)°, β = 108.48 (3)°, γ = 86.65 (2)°; Z = 2. It consists of a butterfly arrangement of metal atoms, the tungsten atom being on the hinge and the alkyne being μ4-η2 bonded. Compounds 3a,b react also with an excess of the same alkynes affording respectively 4a,b and 5a,b and the corresponding alkenes.
EINE VERBESSERTE SYNTHESE DER TRICARBONYL(CYCLOPENTADIENYL)METALLAT-ANIONEN DES CHROMS, MOLYBDAENS UND WOLFRAMS
Behrens, Ulrich,Edelmann, Frank
, p. 179 - 182 (2007/10/02)
Treatment of (CH3CN)3M(CO)3 complexes with C5H5Na in THF is an efficient method for the preparation in high yields of pure Na salts (M = Cr, Mo, W).The preparation of tetraethylammonium and tetraphenylphosphonium salts of the (C5H5)M(CO)3su
