乙醚 、 三(五氟苯基)硼烷 以100%的产率得到ether adduct of tris(pentafluorophenyl)boron
参考文献:
名称:
具有二乙基醚的第13组元素三亚五氟苯基配合物的结构和能量特征
摘要:
合成了13族元素三五氟苯基衍生物E(C 6 F 5)3(E = B,Al,Ga,In)与组成为1:1的二乙醚的配合物。所有化合物都是同构的。热稳定性研究表明,在升高的温度下,所有配合物都会随着五氟苯的分解而分解。已使用三种DFT方法计算了化合物离解反应的几何形状和热力学特性。氘苯和CD 2 Cl 2中配位醚的1 H NMRα-质子化学位移溶液与配合物的气相解离焓相关。B(C 6 F 5)3可能具有较高的Lewis酸度,这是因为受体部分的金字塔效应较大。
Synthesis and Structure of the Dimethyl Sulfide Adducts of Mono- and Bis(pentafluorophenyl)borane
作者:Anna-Marie Fuller、David L. Hughes、Simon J. Lancaster、Callum M. White
DOI:10.1021/om100152v
日期:2010.5.10
The borane dimethyl sulfide adduct H3B·SMe2 and the diethyl ether adduct of tris(pentafluorophenyl)borane, (C6F5)3B·OEt2, undergo facile exchange of hydride and pentafluorophenylligands, yielding (C6F5)2HB·SMe2 (1) and (C6F5)H2B·SMe2 (2) depending upon the ratio of reagents used. In the presence of excess dimethyl sulfide, both compounds can be isolated as colorless crystals, which have been structurally
硼烷二甲硫醚加合物H 3 B·SMe 2和三(五氟苯基)硼烷二乙醚加合物(C 6 F 5)3 B·OEt 2易于氢化物和五氟苯基配体交换,生成(C 6 F 5)2 HB·SMe 2(1)和(C 6 F 5)H 2 B·SMe 2(2)取决于所用试剂的比例。在过量的二甲基硫醚存在下,两种化合物都可以分离为无色晶体,这在结构上已经得到了表征。
Lewis Acid Enhancement of Proton Induced CO<sub>2</sub> Cleavage: Bond Weakening and Ligand Residence Time Effects
作者:Joshua A. Buss、David G. VanderVelde、Theodor Agapie
DOI:10.1021/jacs.8b05874
日期:2018.8.15
Though Lewisacids (LAs) have been shown to have profound effects on carbon dioxide (CO2) reduction catalysis, the underlying cause of the improved reactivity remains unclear. Herein, we report a well-defined molecular system for probing the role of LA additives in the reduction of CO2 to carbonmonoxide (CO) and water. Mo(0) CO2 complex (2) forms adducts with a series of LAs, demonstrating CO2 activation
尽管路易斯酸 (LA) 已被证明对二氧化碳 (CO2) 还原催化具有深远的影响,但反应性提高的根本原因仍不清楚。在此,我们报告了一个明确定义的分子系统,用于探索 LA 添加剂在将 CO2 还原为一氧化碳 (CO) 和水方面的作用。Mo(0) CO2 复合物 (2) 与一系列 LA 形成加合物,表明 CO2 活化与 LA 的强度呈线性相关。质子诱导这些 LA 加合物的 CO 裂解,这与主要在不存在 LA 的情况下观察到的 CO2 置换形成对比。CO2 裂解显示出依赖于键活化和结合小分子的停留时间,证明了动力学和热力学因素对促进生产性 CO2 还原化学的影响。
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-catalysed isomerization of terminal olefins
作者:He Wang、Fanwei Meng、Xin Tao
DOI:10.1039/d4nj00113c
日期:——
Selective isomerization of terminalolefins to afford new internal olefins is an atom economic reaction that is usually catalysed by metal catalysts. Here, we present a tris(pentafluorophenyl)borane [B(C6F5)3]-catalysed isomerization of olefins. Linear α-olefins are converted to 2-olefins in high yields with unsatisfactory stereoselectivity under the applied reaction conditions. At the same time, the
末端烯烃的选择性异构化以提供新的内烯烃是通常由金属催化剂催化的原子经济反应。在这里,我们提出了三(五氟苯基)硼烷[B(C 6 F 5 ) 3 ]催化的烯烃异构化。在所应用的反应条件下,直链 α-烯烃以高产率转化为 2-烯烃,但立体选择性不令人满意。同时,通过烯丙基苯的异构化可以获得具有高区域和立体选择性的生物相关的苯丙烯类产品。
Synthesis, Structure, and Stability of Adducts between Phosphide and Amide Anions and the Lewis Acids Borane, Tris(pentafluorophenyl)borane, and Tris(pentafluorophenyl)alane
作者:Anna-Marie Fuller、Andrew J. Mountford、Matthew L. Scott、Simon J. Coles、Peter N. Horton、David L. Hughes、Michael B. Hursthouse、Simon J. Lancaster
DOI:10.1021/ic901799q
日期:2009.12.7
The phosphinoborane adduct H3P center dot B(C6F5)(3) can be deprotonated using LiN(SiMe3)(2) to give the phosphidoborate salt Li[H2PB(C6F5)(3)], which was converted to the phosphidodiborates Li[H2PB(C6F5)(3)}(2)] and Li[H2PB(C6F5)(3)}BH3}] by treatment with an equivalent of B(C6F5)(3) or Me2S center dot BH3, respectively. A series of anions of the form [RR'PM(C6F5)(3)}BH3}](-), where R = R' = Ph or R= Bu-t, R' = H, and M = B or Al, were prepared (through treatment of salts Li[RR'P(BH3)] with the corresponding Lewis acid) and characterized using multinuclear NMR elemental analysis and X-ray crystallography. The solid state structures of [Li(Et2O)(x)][Ph2PM(C6F5)(3)}BH3}] exhibit eta(2)-bonding of the BH3 group to the cationic lithium center. The attempted preparation of an analogous series with amide cores of the form [R2NB(C6F5)(3)}BH3}](-) proved unsuccessful; among the competing reaction pathways hydride abstraction occurred preferentially to yield Li[HB(C6F5)(3)] and dimers or higher oligorners with the composition (R2NBH2)(n).
The composition and structure of lithium tetrakis(pentafluorophenyl)borate diethyletherate
作者:Eddy Martin、David L. Hughes、Simon J. Lancaster
DOI:10.1016/j.ica.2009.09.013
日期:2010.1
Treatment of LiC6F5 with B(C6F5)(3) in equal volumes of light petroleum and diethyl ether at low temperature followed by slow warming to room temperature precipitates a microcrystalline solid which dries under vacuum to a material with the composition [Li(OEt2)(3)][B(C6F5)(4)]. Crystallization from diethyl ether yields solvent dependent [Li(OEt2)(4)][B(C6F5)(4)], which has been crystallographically characterised. (C) 2009 Elsevier B. V. All rights reserved.