7677-24-9Relevant articles and documents
Free and Assosiated Trimethylsilyl Cation in Solution
Lambert, Joseph B.,McConnell, JoAnn A.,Schilf, Wojciech,Schulz, William J.
, p. 455 - 456 (1988)
The trimethylsilyl cation (Me3Si+) has been prepared as an ion pair with perclorate in CH2Cl2 or as the nonspecifically solvated ion in dilute sulpholane ny hydride abstraction from triethylsilane.
Alkoxycyanoborates: Metal salts and low-viscosity ionic liquids
Finze, Maik,Ignat'Ev, Nikolai V.,Reiss, Guido J.,Schopper, Nils,Sprenger, Jan A. P.,Zapf, Ludwig
, p. 14973 - 14987 (2021/09/04)
Syntheses of alkoxytricyanoborates and dialkoxydicyanoborates are described using different readily available boron-based starting compounds such as tetrahydrido-, tetrafluoro-, and tetraalkoxyborates, as well as trimethoxyborane and trimethylsilylcyanide as cyano sources. The salts obtained have been characterized by NMR and vibrational spectroscopy, elemental analysis, and DSC and DTA measurements. In addition to alkali metal salts, room temperature ionic liquids [EMIm][ROB(CN)3] (R = CH3, C2H5, CH2CF3) have been prepared. These ionic liquids exhibit very low melting points or glass transition temperatures, low viscosities, and high chemical, thermal, and electrochemical stabilities. The influence of alkyl chain length and the effect of partial fluorination of the alkoxy group on these properties have been elucidated. The advantageous physicochemical properties, in general, and in conjunction with the easy accessibility make alkoxytricyanoborate-ILs interesting compounds for potential applications in materials sciences. Furthermore, the Li salt of the [CH3OB(CN)3]- ions was prepared and found to provide a significantly higher solubility in propylene carbonate compared to lithium tetracyanoborate. Alkali metal salts Li[CH3OB(CN)3]·H2O, Na[CH3OB(CN)3]·H2O, K[CH3OB(CN)3], Na[C2H5OB(CN)3], and Na[CF3CH2OB(CN)3]·0.5H2O have been characterized by single-crystal X-ray diffraction. This journal is
Perfluoroalkyltricyanoborate and Perfluoroalkylcyanofluoroborate Anions: Building Blocks for Low-Viscosity Ionic Liquids
Landmann, Johannes,Sprenger, Jan A. P.,Hennig, Philipp T.,Bertermann, Rüdiger,Grüne, Matthias,Würthner, Frank,Ignat'ev, Nikolai V.,Finze, Maik
supporting information, p. 608 - 623 (2017/11/21)
The potassium perfluoroalkyltricyanoborates 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 (2 c)] 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=1-ethyl-3-methylimidazolium). These [EMIm]+ salts are hydrophobic room-temperature ionic liquids (RTILs) that are thermally, chemically and electrochemically very robust, offering electrochemical windows up to 5.8 V. The RTILs described herein, exhibit very low viscosities with a minimum of 14.0 mPa s at 20 °C for [EMIm]1 c, low melting points down to ?57 °C for [EMIm]2 b and extraordinary high conductivities up to 17.6 mS cm?1 at 20 °C for [EMIm]1 c. The combination of these properties makes these ILs promising materials for electrochemical devices as exemplified by the application of selected RTILs as component of electrolytes in dye-sensitised solar cells (DSSCs, Gr?tzel cells). The efficiency of the DSSCs was found to increase with a decreasing viscosity of the neat ionic liquid. In addition to the spectroscopic characterisation, single crystals of the potassium salts of the anions 1 b–d, 2 d, 3 b and 4 c as well as of [nBu4N]2 c have been studied by X-ray diffraction.
Di- and tetrametallic hafnocene oxamidides prepared from CO-induced N 2 bond cleavage and thermal rearrangement to hafnocene cyanide derivatives
Semproni, Scott P.,Margulieux, Grant W.,Chirik, Paul J.
, p. 6278 - 6287,10 (2020/08/24)
Carbonylation of the hafnocene dinitrogen complex [(η5- C5H2-1,2,4-Me3)2Hf] 2(μ2,η2:η2-N 2) with 4 atm of carbon monoxide yielded the tetrametall
IONIC COMPOUND, PROCESS FOR PRODUCING SAME, AND ION-CONDUCTIVE MATERIAL COMPRISING SAME
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Page/Page column 44, (2011/06/23)
The present invention provides a method of producing a tetracyanoborate-containing ionic compound in a milder condition more efficiently and less expensively than conventional methods, and a tetracyanoborate-containing ionic compound having a reduced content of impure components. An ionic compound of the present invention is represented by the following general formula (I), has a content of fluorine atom-containing impurities of 3 mol% or less per 100 mol% of the ionic compound, and a method for producing an ionic compound represented by the general formula (I) of the present invention comprises a step of reacting starting materials containing a cyanide and a boron compound. (In the formula, Ktm+ denotes an organic cation [Kt b]m+ or an inorganic cation [Kta]m+; and m denotes an integer of 1 to 3.)
Efficient synthesis of trimethylsilyl pseudohalides catalyzed by PEG400/ZnI2 under ultrasound irradiation
Sufang, Wang,Shaobing, Wang,Yongshen, Xu
, p. 1271 - 1276 (2007/10/03)
Trimethylsilyl pseudohalides Me3SiX, where X = NCS, NCO, or CN, were readily prepared conveniently in desirable yields by the reaction of Me3SiCl with NaX or KX catalyzed by PEG400 and zinc iodide under ultrasound irradiation. Copyright Taylor & Francis, Inc.
A study on the haterogeneous reaction of trialkylsilyl chlorides with inorganic salts and monocarboxylates catalysed by PEG400
Du, Yun-Fei,Cao, Yu-Qing,Dai, Zhi,Chen, Bao-Hua
, p. 223 - 225 (2007/10/03)
The important and useful trialkylsilyl pseudohalides R3SiX, where X=NCS, NCO, N3 or CN and R=methyl or ethyl, and trimethylsilyl monocarboxylates, where X=RCOO, were readily prepared in high yields by nucleophilic substitution of R3SiCl with X ions provided by NaX or KX at room temperature catalysed by PEG400 and zinc iodide. The reactions of trimethylsilyl chloride with some metal oxysalts were also studied for the first time.
Synthesis of some new chiral bifunctional o-hydroxyarylphosphonodiamides and their application as ligands in Ti(IV) complex catalyzed asymmetric silylcyanation of aromatic aldehydes
He, Ke,Zhou, Zhenghong,Wang, Lixin,Li, Kangying,Zhao, Guofeng,Zhou, Qilin,Tang, Chuchi
, p. 10505 - 10513 (2007/10/03)
Some new chiral bifunctional o-hydroxyarylphosphonodiamides were synthesized starting from (+)-cis-1,2,2-trimethylcyclopentane-1,3-diamine and the absolute configuration of the phosphorus atom was determined by X-ray diffraction analysis. Excellent enantioselectivity (up to 98% ee) was achieved in asymmetric silylcyanation of aromatic aldehydes using a chiral titanium complex formed in situ from Ti(OiPr)4 and o-hydroxyarylphosphonodiamide as the catalyst. Graphical Abstract.
A practical and improved method for the preparation of trimethylsilyl cyanide catalysed by PEG400 and zinc iodidet
Cao, Yu-Qing,Du, Yun-Fei,Li, Ji-Tai
, p. 500 - 501 (2007/10/03)
The useful synthetic reagent trimethylsilyl cyanide was readily prepared in high yield by the cyanation of trimethylchlorosilane with potassium cyanide in the presence of PEG400 and zinc iodide under stirring at room temperature or ultrasonic radiation.
Preparation of trifluoromethyl sulfides or selenides from trifluoromethyl trimethylsilane and thiocyanates or selenocyanates
Billard, Thierry,Large, Sylvie,Langlois, Bernard R.
, p. 65 - 68 (2007/10/03)
Trifluoromethyl sulfides (or selenides) are easily obtained in one pot at 0°C from thiocyanates (or selenocyanates), commercial trifluoromethyl trimethylsilane and catalytic amounts of tetrabutylammonium fluoride (TBAF).
