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Bistriflimide
Bistriflimide, also known variously as bis(trifluoromethane)sulfonimide, bis(trifluoromethanesulfonyl)amide, bis(trifluoromethanesulfonyl)imidate (and variations thereof), informally and somewhat inaccurately as triflimide or triflimidate'','' or by the abbreviations TFSI or NTf2, is a non-coordinating anion with the chemical formula Cfluorine.html"_;"title="carbon.html"_;"title="carbon">Cfluorine">F3 Soxygen.html"_;"title="fluorine">F3sulfur.html"_;"title="carbon">Cfluorine.html"_;"title="carbon.html"_;"title="carbon">Cfluorine">F3sulfur">Soxygen">O2)2nitrogen.html" ;"title="sulfur">Soxygen.html" ;"title="fluorine">F3sulfur.html" ;"title="carbon">Cfluorine.html" ;"title="carbon.html" ;"title="carbon">Cfluorine">F3sulfur">Soxygen">O2)2nitrogen">N]−. Its salts are typically referred to as being metal triflimidates. Applications The anion is widely used in ionic liquids (such as trioctylmethylammonium bis(trifluoromethylsulfonyl)imide), since it is less toxic and more stable than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithium Bis(trifluoromethanesulfonyl)imide
Lithium bis(trifluoromethanesulfonyl)imide, often simply referred to as LiTFSI, is a hydrophilic salt with the chemical formula LiC2F6NO4S2. It is commonly used as Li-ion source in electrolytes for Li-ion batteries as a safer alternative to commonly used lithium hexafluorophosphate Lithium hexafluorophosphate is an inorganic compound with the formula Li PF6. It is a white crystalline powder. Production LiPF6 is manufactured by reacting phosphorus pentachloride with hydrogen fluoride and lithium fluoride :PCl5 + LiF + .... It is made up of one Li cation and a bistriflimide anion. Because of its very high solubility in water (> 21 m), LiTFSI has been used as lithium salt in water-in-salt electrolytes for aqueous lithium-ion batteries. References Lithium salts Lithium-ion batteries Organolithium compounds Trifluoromethyl compounds {{organic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metal Triflimidate
A metal triflimidate M(NTf2)''n'' in organic chemistry is a metal salt or complex of triflimidic acid and used as a catalyst. Metal triflimidates are prepared by reaction of metal oxides, carbonates, hydroxides, or halides with triflimidic acid in water as the hydrate M(NTf2)''n''·''x''H2O with ''x'' ranging from zero to nine. Another method is by metathesis reaction between a metal triflimidate and another metal complex by metal exchange. Commercially available salts are based on lithium and silver. The catalytic activity of metal triflimidates has been demonstrated in cycloadditions, in various rearrangement reactions, in Friedel–Crafts acylation and Friedel–Crafts alkylation. Lithium triflimidate is used as an electrolyte in batteries as a replacement of lithium perchlorate Lithium perchlorate is the inorganic compound with the formula LiClO4. This white or colourless crystalline salt is noteworthy for its high solubility in many solvents. It exists both in anh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Non-coordinating Anion
Anions that interact weakly with cations are termed non-coordinating anions, although a more accurate term is weakly coordinating anion. Non-coordinating anions are useful in studying the reactivity of electrophilic cations. They are commonly found as counterions for cationic metal complexes with an unsaturated coordination sphere. These special anions are essential components of homogeneous alkene polymerisation catalysts, where the active catalyst is a coordinatively unsaturated, cationic transition metal complex. For example, they are employed as counterions for the 14 valence electron cations C5H5)2ZrRsup>+ (R = methyl or a growing polyethylene chain). Complexes derived from non-coordinating anions have been used to catalyze hydrogenation, hydrosilylation, oligomerization, and the living polymerization of alkenes. The popularization of non-coordinating anions has contributed to increased understanding of agostic complexes wherein hydrocarbons and hydrogen serve as ligands. N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2,4,6-trinitrophenol
Picric acid is an organic compound with the formula (O2N)3C6H2OH. Its IUPAC name is 2,4,6-trinitrophenol (TNP). The name "picric" comes from el, πικρός (''pikros''), meaning "bitter", due to its bitter taste. It is one of the most acidic phenols. Like other strongly nitrated organic compounds, picric acid is an explosive, which is its primary use. It has also been used as medicine (antiseptic, burn treatments) and as a dye. History Picric acid was probably first mentioned in the alchemical writings of Johann Rudolf Glauber. Initially, it was made by nitrating substances such as animal horn, silk, indigo, and natural resin, the synthesis from indigo first being performed by Peter Woulfe during 1771. The German chemist Justus von Liebig had named picric acid (rendered in French as ). Picric acid was given that name by the French chemist Jean-Baptiste Dumas in 1841. Its synthesis from phenol, and the correct determination of its formula, were accomplished during 1841 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfonamides
In organic chemistry, the sulfonamide functional group (also spelled sulphonamide) is an organosulfur group with the structure . It consists of a sulfonyl group () connected to an amine group (). Relatively speaking this group is unreactive. Because of the rigidity of the functional group, sulfonamides are typically crystalline; for this reason, the formation of a sulfonamide is a classic method to convert an amine into a crystalline derivative which can be identified by its melting point. Many important drugs contain the sulfonamide group. A sulfonamide (compound) is a chemical compound that contains this group. The general formula is or , where each R is some organic group; for example, "methanesulfonamide" (where R = methane, R' = R" = hydrogen) is . Any sulfonamide can be considered as derived from a sulfonic acid by replacing a hydroxyl group () with an amine group. In medicine, the term "sulfonamide" is sometimes used as a synonym for sulfa drug, a derivative or var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Non-coordinating Anions
Anions that interact weakly with cations are termed non-coordinating anions, although a more accurate term is weakly coordinating anion. Non-coordinating anions are useful in studying the reactivity of electrophilic cations. They are commonly found as counterions for cationic metal complexes with an unsaturated coordination sphere. These special anions are essential components of homogeneous alkene polymerisation catalysts, where the active catalyst is a coordinatively unsaturated, cationic transition metal complex. For example, they are employed as counterions for the 14 valence electron cations C5H5)2ZrRsup>+ (R = methyl or a growing polyethylene chain). Complexes derived from non-coordinating anions have been used to catalyze hydrogenation, hydrosilylation, oligomerization, and the living polymerization of alkenes. The popularization of non-coordinating anions has contributed to increased understanding of agostic complexes wherein hydrocarbons and hydrogen serve as ligands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comins' Reagent
The Comins' reagent is a triflyl-donating reagent that is used to synthesize vinyl triflates from the corresponding ketone enolates or dienolates. It was first reported in 1992 by Daniel Comins. The vinyl triflates prepared are useful as substrates in the Suzuki reaction. See also * Bis(trifluoromethanesulfonyl)aniline Bis(trifluoromethanesulfonyl)aniline is the organic compound with the formula C6H5N(SO2CF3)2.{{cite journal, title=N-Phenyltrifluoromethanesulfonimide , last1=Zeller, first1=Wayne E., last2=Schwörer, first2=Ralf, journal=E-EROS Encyclopedia of Re ... References Reagents for organic chemistry Chloropyridines Sulfonamides Trifluoromethyl compounds Substances discovered in the 1990s {{organic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triflidic Acid
Triflidic acid (''IUPAC name'': tris trifluoromethyl)sulfonylethane, ''abbreviated formula'': Tf3CH) is an organic superacid. It is one of the strongest known carbon acids and is among the strongest Brønsted acids in general, with an acidity exceeded only by the carborane acids. Notably, triflidic acid is estimated to have an acidity 104 times that of triflic acid (p''K''aaq ~ –14), as measured by its acid dissociation constant. It was first prepared in 1987 by Seppelt and Turowsky by the following route:(1) Tf2CH2 + 2CH3MgBr → Tf2C(MgBr)2 + 2CH4 (2) Tf2C(MgBr)2 + TfF → Tf3C(MgBr) + MgBrF (3) Tf3C(MgBr) + H2SO4 → Tf3CH + MgBrHSO4In its anionic form, the lanthanide salts of triflidic acid ("triflides") have been shown to be more efficient Lewis acids than the corresponding triflates. The triflide anion has also been employed as the anionic component of ionic liquids. See also * Bistriflimide * Non-coordinating anion Anions that interact weakly with cations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triflic Acid
Triflic acid, the short name for trifluoromethanesulfonic acid, TFMS, TFSA, HOTf or TfOH, is a sulfonic acid with the chemical formula CF3SO3H. It is one of the strongest known acids. Triflic acid is mainly used in research as a catalyst for esterification. It is a hygroscopic, colorless, slightly viscous liquid and is soluble in polar solvents. Synthesis Trifluoromethanesulfonic acid is produced industrially by electrochemical fluorination (ECF) of methanesulfonic acid: : CH3SO3H + 4 HF ->CF3SO2F + H2O + 3 H2 The resulting CF3SO2F is hydrolyzed, and the resulting triflate salt is reprotonated. Alternatively, trifluoromethanesulfonic acid arises by oxidation of trifluoromethyl sulfenyl chloride: :CF3SCl + 2 Cl2 + 3 H2O -> CF3SO3H + 5 HCl Triflic acid is purified by distillation from triflic anhydride. Historical Trifluoromethanesulfonic acid was first synthesized in 1954 by Robert Haszeldine and Kidd by the following reaction: : Reactions As an acid In the laboratory, trifl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inorganic Imide
The inorganic imides are compounds containing an ion composed of nitrogen bonded to hydrogen with formula HN2−. Organic imides have the NH group, and two single or one double covalent bond to other atoms. The imides are related to the inorganic amides (H2N−), the nitrides (N3−) and the nitridohydrides (N3−•H−). In addition to solid state imides, molecular imides are also known in dilute gases, where their spectrum can be studied. Imide can be a ligand, with a double bond to a metal such as molybdenum (e.g. Mo=NH). As a ligand it is called imido. The imido ligand is part of a nitrogen fixation cycle: Mo•N2 → Mo-N=N− → Mo-N=NH (diazenido) → Mo-N=NH2+ → Mo=N-NH2 (hydrazido) → Mo=N-NH3+ (hydrazidium) → Mo≡N (nitrido) + NH3 → Mo≡NH+ → Mo=NH (imido) → Mo=NH2+ → Mo-NH2 (amido) → Mo-NH3+ → Mo•NH3 (ammine); with the oxidation state of molybdenum varying to accommodate the number bonds from nitrogen. When the hydrogen of the imide group is sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imide
In organic chemistry, an imide is a functional group consisting of two acyl groups bound to nitrogen. The compounds are structurally related to acid anhydrides, although imides are more resistant to hydrolysis. In terms of commercial applications, imides are best known as components of high-strength polymers, called polyimides. Inorganic imides are also known as solid state or gaseous compounds, and the imido group (=NH) can also act as a ligand. Nomenclature Most imides are cyclic compounds derived from dicarboxylic acids, and their names reflect the parent acid. Examples are succinimide, derived from succinic acid, and phthalimide, derived from phthalic acid. For imides derived from amines (as opposed to ammonia), the ''N''-substituent is indicated by a prefix. For example, N-ethylsuccinimide is derived from succinic acid and ethylamine. Isoimides are isomeric with normal imides and have the formula RC(O)OC(NR′)R″. They are often intermediates that convert to the more symmet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amide (functional Group)
In chemistry, the term amide ( or or ) is a compound with the functional group R''n''E(=O)''x''NR2, where ''n'' and ''x'' may be 1 or 2, E is some element, and each R represents an organic group or hydrogen. It is a derivative of an oxoacid R''n''E(=O)''x''OH with an hydroxy group –OH replaced by an amine group –NR2. Some important subclasses are * carboxamides, or organic amides, where E = carbon, with the general formula RC(=O)NR2. * phosphoramides, where E = phosphorus, such as R2P(=O)NR2 * sulfonamides, where E = sulfur, namely RS(=O)2NR2 The term amide may also refer to * amide group, a functional group –C(=O)N= consisting of a carbonyl adjacent to a nitrogen atom. * cyclic amide or lactam, a cyclic compound with the amide group –C(=O)N– in the ring. * metal amide, an ionic compound ("salt") with the azanide anion H2N− (the conjugate base of ammonia) or to a derivative thereof R2N−. There is also a neutral amino radical (•NH2) and a positively c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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