Metallorganische Lewis-Säuren, LV [1] Darstellung und Reaktionen von Tetracarbonylmethyltetrafluoroboratoosmium, cis-(OC)4Os(FBF3)CH3/Organometallic Lewis Acids, LV [1] Preparation and Reactions of Tetracarbonylmethyltetrafluoroboratoosmium, cis-(OC)4Os(FBF3)CH3 (original) (raw)
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Zeitschrift für Naturforschung B, 1991
Pentalithium Octa(ter/-butoxy)samarat(III), Synthesis, X-Ray [Li(tmed)]3[Sm (CH3)6] reacts with te/7-butanol in diethyl ether to give [Li5S m (0-r-C 4 H 9)8] (1), the structure o f which has been elucidated by X-ray structure analysis. 1 crystallizes tetragonally with a = 1703(4) and c-3178(1) pm, space group P 4,2,2, Z = 8. The structure was refined to R = 0.042 for 4082 observed reflections (F0 > 6 er(F0)).
Zeitschrift für anorganische und allgemeine Chemie, 2003
den als Reaktionsprodukt von 2 mit dem Silikon-Schliffett bei Kristallisationsversuchen von 2 erhalten. Beim Versuch, 2 mit CS 2 in THF umzusetzen wurde das THF-Spaltungsprodukt [HC(PPh 3) 2 ][CH 3 CH 2 CH 2 OCS 2 ] (7) in 60 %iger Ausbeute erhalten. Sämtliche Verbindungen wurden durch Einkristallstrukturanalysen charakterisiert, inklusive das bei der Darstellung von 3 angefallene Nebenprodukt [Br 3 Al{OP(C 6 H 5) 2 CH 2 P(C 6 H 5) 3 }][AlBr 4 ] (8) sowie die zur Synthese von 1 verwendete salzartige Verbindung [ClC(PPh 3) 2 ]Cl (9). tallize 2. Attempts to react 2 with CS 2 in THF gave the THFdecomposition product [HC(PPh 3) 2 ][CH 3 CH 2 CH 2 OCS 2 ] (7) in 60 % yield. All compounds were characterized by X-ray analyses including the byproduct [Br 3 Al{OP(C 6 H 5) 2 CH 2 P(C 6 H 5) 3 }][AlBr 4 ] (8) obtained during the preparation of 3 and the precursor compound for the synthesis of 1, the salt like compound [ClC(PPh 3) 2 ]Cl (9).
Zeitschrift für Naturforschung B, 1975
The organotin compounds Me3SnE(CF3)2, Me3SnE(H)CF3 and (Me3Sn)2ECF3 (Me = CH3, E = P, As) are obtained in good yield by the reaction of E2(CF3)4 and (CF3E)n (n = 4,5), respectively, with trimethylstannane.
Zeitschrift für Naturforschung B, 1996
The title compounds have been prepared from tetraphenylphosphonium chloride and N,N′- dimethylurea in acetonitrile using different molar ratios of the educts. Both compounds were characterized by IR spectroscopy and by crystal structure determinations. PPh4[Cl(H2,Me2,N2,CO)]: Space group P1̅, Z = 4 ,a = 1021.8(2), b = 1192.7(2), c = 2143.9(4) pm, α = 87.21(3)°, β = 85.95(3)°, γ = 74.16(3)° (-50°C). (PPh4)2[Cl(H2Me2N2CO)]Cl: Space group P21/n, Z = 4, a = 1138.4(2), b = 2855.4(3), c = 1394.0(1) pm, β = 91.19(10)° (-60°C). In both compounds the N.N′-dimethylurea molecule acts as a chelating Lewis acid via two Cl···H hydrogen bonds forming nearly planar ClH2N2C-six-membered heterocycles.
Zeitschrift für Naturforschung B, 1992
In order to obtain soluble molybdenum sulfur oxo complexes, [Mo(O)2('buS4')] (1) ('buS4'2- = 1,2-bis(2-mercapto-3,5-di-t-butylphenylthio)ethane(2-)) was synthesized by reaction of [Mo(O)2(acac)2] (acac- = acetylacetonate(1-) ) with 'buS4'-Li2. Treatment of 1 with PPh3 yielded [μ-O{Mo(O)('buS4')}2] (2) and OPPh3 in an oxo transfer reaction. [Mo(PMe3)2('buS2')2] (3) ('buS2'2- = 3,5-di-t-butyl-1,2 -benzenedithiolate(2-)) was obtained by twofold desoxygenation of 1 with excess PMe3 via a redox coupled addition elimination reaction. 2 reacts with the oxo group donor DMSO to yield 1 and Me2S. The system 1/2 then catalyses the oxo transfer reaction from DMSO to PPh3 and, therefore, shows properties modelling the co-factor in oxotransferases. In contrast to the parent compound [Mo(O)2('S4')] ('S4'2- = 1,2-bis(2-mercaptophenylthio)ethane(2-)), 1 is reactive towards hydrazine and its derivatives. Reactions with hydrazine and alky...