Carbonyltris(trifluoromethyl)borane, (CF3)3BCO, An Unusual Boron Carbonyl This work was supported by the Deutsche Forschungsgemeinschaft, the Fonds der Chemischen Industrie (D.F.G), Merck KGaA, Darmstadt, and the Heinrich Hertz Stiftung (Grant to F.A.)
Tris(trifluoromethyl)borane Carbonyl, (CF<sub>3</sub>)<sub>3</sub>BCOSynthesis, Physical, Chemical and Spectroscopic Properties, Gas Phase, and Solid State Structure
Tris(trifluoromethyl)borane carbonyl, (CF(3))(3)BCO, is obtained in high yield by the solvolysis of K[B(CF(3))(4)] in concentrated sulfuric acid. The in situ hydrolysis of a single bonded CF(3) group is found to be a simple, unprecedented route to a new borane carbonyl. The related, thermally unstable borane carbonyl, (C(6)F(5))(3)BCO, is synthesized for comparison purposes by the isolation of (C(6)F(5))(3)B in a
Rearrangement Reactions of the Transient Lewis Acids (CF<sub>3</sub>)<sub>3</sub>B and (CF<sub>3</sub>)<sub>3</sub>BCF<sub>2</sub>: An Experimental and Theoretical Study
are modeled by density functional calculations. The energybarriers of the transition states are low in agreement with the experimental results that (CF(3))(3)B and (CF(3))(3)BCF(2) are short-lived intermediates. Since CF(2) complexes are key intermediates in the rearrangement reactions of (CF(3))(3)B and (CF(3))(3)BCF(2), CF(2) affinities of some perfluoroalkylfluoroboranes are presented. CF(2) affinities
Perfluoroalkyltricyanoborate and Perfluoroalkylcyanofluoroborate Anions: Building Blocks for Low-Viscosity Ionic Liquids
作者:Johannes Landmann、Jan A. P. Sprenger、Philipp T. Hennig、Rüdiger Bertermann、Matthias Grüne、Frank Würthner、Nikolai V. Ignat'ev、Maik Finze
DOI:10.1002/chem.201703685
日期:2018.1.12
K[CnF2 n+1B(CN)3] [n=1 (1 d), 2 (2 d)] and the potassium mono(perfluoroalkyl)cyanofluoroborates K[CnF2 n+1BF(CN)2] [n=1 (1 c), 2 (2c)] and [CnF2 n+1BF2(CN)]− [n=1 (1 b), 2 (2 b), 3 (3 b), 4 (4 b)] are accessible with perfect selectivities on multi‐gram scales starting from K[CnF2 n+1BF3] and Me3SiCN. The K+ salts are starting materials for the preparation of salts with organic cations, for example, [EMIm]+ (EMIm
全氟烷基三氰基硼酸钾K [C n F 2 n +1 B(CN)3 ] [ n = 1(1 d),2(2 d)]和单(全氟烷基)氰基氟硼酸钾K [C n F 2 n +1 BF(CN)2 ] [ n = 1(1 c),2(2 c)]和[C n F 2 n +1 BF 2(CN)] − [ n = 1(1 b),2(2 b),3(3 b),4(从K [[C n F 2 n +1 BF 3 ]和Me 3 SiCN开始,可以在几克尺度上以完美的选择性访问4 b)] 。K +盐是制备带有有机阳离子的盐的原料,例如[EMIm] +(EMIm = 1-乙基-3-甲基咪唑鎓)。这些[EMIm] +盐是疏水性室温离子液体(RTIL),在热,化学和电化学方面非常坚固,可提供高达5.8 V的电化学窗口。本文所述的RTIL具有非常低的粘度,最低为14.0 mPa s [EMIm] 1 c在20°C时,[EMIm]的低熔点低至-57°C2
Syntheses, Solution Multi-NMR Characterization, and Reactivities of [C<sub>6</sub>F<sub>5</sub>Xe]<sup>+</sup> Salts of Weakly Coordinating Borate Anions, [BY<sub>4</sub>]<sup>-</sup> (Y = CF<sub>3</sub>, C<sub>6</sub>F<sub>5</sub>, CN, or OTeF<sub>5</sub>)
作者:Karsten Koppe、Vural Bilir、Hermann-J. Frohn、Hélène P. A. Mercier、Gary J. Schrobilgen
DOI:10.1021/ic7010138
日期:2007.10.1
New examples of [C6F5Xe]+ salts of the weaklycoordinatinganions [B(CF3)4]-, [B(C6F5)4]-, [B(CN)4]-, and [B(OTeF5)4]- have been synthesized by metathesis reactions of [C6F5Xe][BF4] with the corresponding MI[BY4] salts (MI = K or Cs; Y = CF3, C6F5, CN, or OTeF5). The salts were characterized in solution by multi-NMR spectroscopy. Their stabilities in prototypic solvents (CH3CN and CH2Cl2) and decomposition
[H(OEt<sub>2</sub>)<sub>2</sub>]<sup>+</sup> and [Ph<sub>3</sub>C]<sup>+</sup> Salts of the Borate Anions [B(CF<sub>3</sub>)<sub>4</sub>]<sup>-</sup>, [(CF<sub>3</sub>)<sub>3</sub>BCN]<sup>-</sup>, and [B(CN)<sub>4</sub>]<sup>-</sup>
作者:Maik Finze、Eduard Bernhardt、Michael Berkei、Helge Willner、Joyce Hung、Robert M. Waymouth
DOI:10.1021/om050463j
日期:2005.10.1
with K[B(CF3)4] in diethyl ether gave the oxonium acid [H(OEt2)2][B(CF3)4] as a stable salt at room temperature. Syntheses of [Ph3C][B(CF3)4] and [Ph3C][(CF3)3BCN] were accomplished from the corresponding potassium salts and Ph3CCl. The metathesis reaction of Ag[B(CN)4] with trityl bromide resulted in formation of [Ph3C][B(CN)4]. Treatment of Cp2ZrMe2 with [H(OEt2)2][B(CF3)4], [Ph3C][B(CF3)4], [Ph3C][(CF3)3BCN]