1535-92-8Relevant academic research and scientific papers
Metal???F?C Bonding in Low-Coordinate Alkaline Earth Fluoroarylamides
Roueindeji, Hanieh,Ratsifitahina, Antsa,Roisnel, Thierry,Dorcet, Vincent,Kahlal, Samia,Saillard, Jean-Yves,Carpentier, Jean-Fran?ois,Sarazin, Yann
, p. 8854 - 8864 (2019)
A set of calcium and barium complexes containing the fluoroarylamide N(C6F5)2? is presented. These compounds illustrate the key role of stabilising M???F?C secondary interactions in the construction of low-coordinate alkaline earth complexes. The nature of Ca???F?C bonding in calcium complexes is examined in the light of structural data, bond valence sum (BVS) analysis and DFT computations. The molecular structures of [Ca{N(C6F5)2}2(Et2O)2] (4′), [Ca{μ-N(SiMe3)2}{N(C6F5)2}]2 (52), [Ba{μ-N(C6F5)2}{N(C6F5)2}?toluene]2 (62), [{BDIDiPP}CaN(C6F5)2]2 (72), [{N^NDiPP}CaN(C6F5)2]2 (82), and [Ca{μ-OB(CH(SiMe3)2)2}{N(C6F5)2}]2 (92), where {BDIDiPP}? and {N^NDiPP}? are the bidentate ligands CH[C(CH3)NDipp]2? and DippNC6H4CNDipp? (Dipp=2,6-iPr2-C6H3), are detailed. Complex 62 displays strong Ba???F?C contacts at around 2.85 ?. The calcium complexes feature also very short intramolecular Ca?F interatomic distances at around 2.50 ?. In addition, the three-coordinate complexes 72 and 82 form dinuclear structures due to intermolecular Ca???F?C contacts. BVS analysis shows that Ca???F?C interactions contribute to 15–20 % of the bonding pattern around calcium. Computations demonstrate that Ca???F?C bonding is mostly electrostatic, but also contains a non-negligible covalent contribution. They also suggest that Ca???F?C are the strongest amongst the range of weak Ca???X (X=F, H, Cπ) secondary interactions, due to the high positive charge of Ca2+ which favours electrostatic interactions.
Synthesis and Application of a Perfluorinated Ammoniumyl Radical Cation as a Very Strong Deelectronator
Heizmann, Tim,Krossing, Ingo,Rein, Stephan,Schmucker, Maximillian,Schorpp, Marcel,Weber, Stefan
, p. 9453 - 9459 (2020)
The perfluorinated dihydrophenazine derivative (perfluoro-5,10-bis(perfluorophenyl)-5,10-dihydrophenazine) (“phenazineF”) can be easily transformed to a stable and weighable radical cation salt by deelectronation (i.e. oxidation) with Ag[Al(OR
Complexes of the Lewis Acid Ga[N(C6F5)2]3 with Acetonitrile and Pyridine
Zavgorodnii,Pomogaeva,Timoshkin
, p. 2305 - 2311 (2021/02/12)
Abstract: Reaction of the Lewis acid Ga[N(C6F5)2]3 with acetonitrile and pyridine in toluene solution was characterized by 19F NMR. Quantum chemical calculations show that the shorter donor-acceptor b
Fluoro- and perfluoralkylsulfonylpentafluoroanilides: Synthesis and characterization of NH acids for weakly coordinating anions and their gas-phase and solution acidities
K?gel, Julius F.,Linder, Thomas,Schr?der, Fabian G.,Sundermeyer, J?rg,Goll, Sascha K.,Himmel, Daniel,Krossing, Ingo,Kütt, Karl,Saame, Jaan,Leito, Ivo
, p. 5769 - 5782 (2015/03/31)
Fluoro- and perfluoralkylsulfonyl pentafluoroanilides [HN(C6F5)(SO2X); X=F, CF3, C4F9, C8F17] are a class of imides with two different strongly electron-withdrawing su
LITHIUM SALTS OF PENTAFLUOROPHENYLAMIDE ANIONS, PREPARATION THEREOF AND USE THEREOF
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Page/Page column 7-8, (2012/10/08)
The present invention provides new lithium salts comprising pentafluorophenylamide anions following the general formula Li+[N(SO2—R)(C6F5)]?, which are optionally present as solvent-free complexes. R is hereby selected from fluorine, linear or branched acyclic or cyclic alkyl groups with 1 to 20 carbon atoms which are not fluorinated, partially fluorinated or fully fluorinated; or not fluorinated, partially fluorinated or fully fluorinated aryl or benzyl groups with 1 to 20 carbon atoms. The lithium salts according to the present invention are produced by reacting the corresponding NH acid of the pentafluorophenylamide with one equivalent of lithium bis(trimethylsilyl)amide or lithium organyl, wherein the reaction is carried out advantageously in the presence of apolar aprotic solvents. In this way, lithium salts in the form of solvent-free complexes are obtained. These solvent-free lithium complexes are thermally, electrochemically and against oxidation stable and comprise a high ionic conductivity. The lithium salts according to the present invention are suitable to be used as ion-conducting materials, electrically conductive materials, dyes and in chemical catalysis. They are preferably used as ion-conducting electrolytes in lithium ion accumulators.
Three novel anions based on pentafluorophenyl amine combined with two new synthetic strategies for the synthesis of highly lipophilic ionic liquids
Linder, Thomas,Sundermeyer, Joerg
scheme or table, p. 2914 - 2916 (2009/12/01)
The three new fluorinated anions BPFPA, PFTFSI, and PFNFSI for highly hydrophobic, hydrolytically stable ionic liquids are introduced, together with a strategy allowing a combinatorial approach for the synthesis of imidazolium and phosphonium based ionic
Model reactions for preparing poly(imino-tetrafluoro-1,4-phenylene)
Koppang, Rolf
, p. 1505 - 1509 (2008/09/16)
2,3,4,5,6-Pentafluoroformanilide was prepared giving, in addition, two new compounds 4,5,6,7-tetrafluoro-1-pentafluorophenyl-benzimidazole and 2,3,4,5-tetrafluoro-6-[(pentafluorophenyl)amino]formanilide. Sodium 2,3,4,5,6-pentafluoro-formanilide was reacted with hexafluorobenzene in a molar ratio of 1:4 to give oligomers of α-pentafluorophenyl-ω-fluoro-poly(imino-tetrafluoro-1,4-phenylene). Some of the oligomers were isolated. The results indicate that poly(imino-tetrafluoro-1,4-phenylene) could be formed. Model reaction on hexafluorobenzene with sodium acetanilide, molar ratio 1:2, gave a low yield of N,N′-diacetyl-diphenyl-tetrafluoro-1,4-phenylenediamine.
