Search results for "triflate"

showing 4 items of 4 documents

Non-Innocent Base Properties of 3- and 4-Pyridyl-dithia- and Diselenadiazolyl Radicals : The Effect of N-Methylation

2018

International audience; Condensation of persilylated nicotinimideamide and isonicotinimideamide with sulfur monochloride affords double salts of the 3-, 4-pyridyl-substituted 1,2,3,5-dithiadiazolylium DTDA cations of the general formula [3-, 4-pyDTDA][Cl][HCl] in which the pyridyl nitrogen serves as a noninnocent base. Reduction of these salts with triphenylantimony followed by deprotonation of the intermediate-protonated radical affords the free base radicals [3-, 4-pyDTDA], the crystal structures of which, along with those of their diselenadiazolyl analogues [3-, 4-pyDSDA], have been characterized by powder or single-crystal X-ray diffraction. The crystal structures consist of “pancake” π…

Base (chemistry)Radicalsuolat (yhdisteet)free radicals02 engineering and technologyCrystal structure010402 general chemistryMetathesistriflate saltsvapaat radikaalit01 natural sciencesMedicinal chemistryChlorideInorganic ChemistrydimersDeprotonationrikkiyhdisteetmedicinePhysical and Theoretical Chemistryta116dithiadiazoleschemistry.chemical_classificationIntermolecular forceFree base[CHIM.MATE]Chemical Sciences/Material chemistryN-methylation021001 nanoscience & nanotechnology0104 chemical sciencesoligomeerichemistry0210 nano-technologymedicine.drug
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Water-Tolerant Trifloaluminate Ionic Liquids: New and Unique Lewis Acidic Catalysts for the Synthesis of Chromane

2018

The first example of triflometallate ionic liquids, named in analogy to chlorometallate ionic liquids, is reported. Trifloaluminate ionic liquids, synthesised from 1-alkyl-3-methylimidazolium triflates and aluminium triflate, were characterised by multinuclear NMR spectroscopy and FT-IR spectroscopy, revealing the existence of oligonuclear, multiply-charged trifloaluminate anions, with multiple bridging triflate modes. Acceptor numbers were determined to quantify their Lewis acidity, rendering trifloaluminate ionic liquids as medium-strength Lewis acids (AN = ca. 65). Used as acidic catalysts in the cycloaddition of 2,4-dimethylphenol and isoprene (molar ratio 2:1) to prepare chromane, trif…

carbon nanotubes010405 organic chemistrymetal triflatesGeneral ChemistryNuclear magnetic resonance spectroscopy010402 general chemistry01 natural sciencesAcceptor0104 chemical sciencesCatalysislcsh:ChemistryChemistrychemistry.chemical_compoundchromanelcsh:QD1-999chemistrytrifloaluminate ionic liquidsPolymer chemistryIonic liquidChromaneLewis acids and basesSILPTrifluoromethanesulfonateIsopreneOriginal Research
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Crystal structure of 1-hy­droxy-2,2,6,6-tetra­methyl­piperidin-1-ium tri­fluoro­methane­sulfonate

2015

In the cation of the title salt, C9H20NO+·CF3O3S−, the six-membered heterocyclic ring displays a chair conformation. In the crystal, centrosymmetric pairs of cations and anions are linked by N—H...O and O—H...O hydrogen bonds to form rings with aR44(14) graph-set motif.

chemistry.chemical_classificationcrystal structurebiologyHydrogen bondStereochemistryCyclohexane conformationSalt (chemistry)Methane sulfonateGeneral ChemistryCrystal structureCondensed Matter Physicsbiology.organism_classificationRing (chemistry)hydrogen bondingMedicinal chemistryData ReportsCrystallcsh:Chemistrychemistrylcsh:QD1-999triflateTetraammonium saltGeneral Materials ScienceTEMPOActa Crystallographica Section E: Crystallographic Communications
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The Preparation of Diaryl Sulfoxonium Triflates and Their Application in Palladium‐Catalyzed Cross‐Coupling Reactions

2022

Chemistry 17(19), e202200828 (2022). doi:10.1002/asia.202200828

sulfoxinium660Molecular StructuresulfoximinekemiaOrganic ChemistryGeneral ChemistryBiochemistryCatalysisonium salttriflateddc:660SaltsPalladiumcoupling reaction
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