3741-36-4Relevant academic research and scientific papers
Electrolyte flame retardant additive and preparation method and application thereof
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Paragraph 0146; 0147; 0148; 0149, (2019/12/25)
The invention discloses an electrolyte flame retardant additive, a preparation method of the flame retardant additive and application of the flame retardant additive in a battery electrolyte. The electrolyte flame retardant prepared in the invention is a five-membered cyclic phosphite compound, can be used as an additive in a secondary electrolyte to improve the thermal stability of the electrolyte, while a cyclic structure can form an SEI film on the surface of a negative electrode material, so that the additive can obviously improve the high and low temperature, circulation, storage and other properties of a secondary battery, and the prepared secondary battery not only can be effectively improved in safety, but also can be improved in comprehensive properties. The preparation method ofthe flame retardant additive has the advantages of low raw material cost, simple preparation process steps, safe operation, high product purity and little environmental pollution.
Synthesis of the new types of N-substituted aminomethylenebisorganophosphorus acids and their derivatives
Prishchenko, Andrey A.,Livantsov, Mikhail V.,Novikova, Olga P.,Livantsova, Ludmila I.,Petrosyan, Valery S.
experimental part, p. 319 - 324 (2010/08/05)
The interaction of esters of trivalent organophosphorus acids containing PH and POSiMe3 fragments with various derivatives of formamide is proposed as convenient methods for the synthesis of new N-substituted aminomethylenebisorganophos-phorus acids and their derivatives with three-, four-, and five-coordinated phosphorus. Also the new functionalized derivatives of the new aminomethylenebisphosphinic acids with substituted hydroxymethyl moieties are synthesized, and some properties of the obtained compounds are presented.
NEW TYPES OF AMINOMETHYL ORGANOPHOSPHORUS COMPOUNDS
Prishchenko, A.A.,Livantsov, M.V.,Petrosyan, V.S.
, p. 1181 - 1193 (2007/10/02)
We studied aminomethylation of various PH acids their derivatives containing highly reactive PH, PSi, POSi and PC(O) fragments: tris(trimethylsilyl)phosphine, trimethylsilyl esters of phosphorus(III) acids, pivaloylphosphonite, and hydrospirophosphoranes.Chloro-, alkoxy- or dialkylaminomethylamines, dialkylformamide acetals, azomethines, and enamines were used as aminomethylating reagents.Convenient methods for synthesizing previously unknown or difficult-to-obtain organic compounds of two-, three-, four, and five-coordinate phosphorus containing a P-C-N fragment were proposed.
DISPLACEMENT RATE OF ARYLOXY SUBSTITUENTS IN CYCLIC AND ACYCLIC TRIPHOSPHITES BY METHOXIDE IONS, AND WATER
Aksnes, Gunnar,Froeyen, Paul
, p. 45 - 50 (2007/10/02)
The displacement rate of aryloxy substituents by methoxide ions in the following triphosphites: 2-phenoxy-1,3,2-dioxaphospholane (I), 2-methoxy-benz-1,3,2-dioxaphospholene (II), and dimethyl phenylphosphite (III), is for each phosphite higher in methanol than in dichloromethane.On the other hand, dichloromethane discriminates much more strongly between five-membered cyclic and acyclic phosphites than methanol, as shown by the following rate ratios cyclic/acyclic in CH3OH: I/III = 13, II/III = 2; and in CH2Cl2: I/III = 1.8 x 103, II/III = 1.1 x 103. Water, as nucleophile towards the same phosphites in deuteroacetone, appears to exhibit somewhat similar magnitude of discrimination as methoxide in methanol. Key Words: Cyclic and acyclic triphosphites; displacement rate of aryloxy substituents.
MECHANISM OF NUCLEOPHILIC SUBSTITUTION AT TRICOVALENT PHOSPHORUS
Dahl, Otto
, p. 201 - 204 (2007/10/02)
The mechanism of substitution reactions at tricovalent phosphorus, mainly the system + ROH, is discussed on the basis of stereochemistry, catalysis, kinetics and substituent effects.
Cyclic Phosphorylation Reaction of Diols with Tri(1-imidazolyl)phosphine
Shimidzu, Takeo,Yamana, Kazushige,Kanda, Naoya,Kitagawa, Susumu
, p. 3483 - 3485 (2007/10/02)
Tri(1-imidazolyl)phosphine (1) gave the cyclic phosphite quantitatively in the reactions with the diols possessing favorably placed hydroxyl groups in which the distance between the two oxygen atoms is 2.7-3.0 Angstroem.The both five- and six-membered cyclic phosphites were obtained quantitatively from the reactions of the diols possessing flexible chains with 1.The course of the selective formation of ribonucleoside 2',3'-cyclic 1-imidazolylphosphonite was interpretated by the higher reactivity of 1 toward the 2'- or 3'-hydroxyl group than toward the 5'-hydroxyl group of ribonucleoside.
HYDROLYSE ET ALCOOLYSE DE SPIROPHOSPHORANES CONTENANT LE LIGAND α AMINOACIDE
Garrigues, Bernard,Munoz, Aurelio,Mulliez, Michel
, p. 183 - 188 (2007/10/02)
Water and alcohol react with spirophosphoranes 1-3 to give respectively tetracoordinated phosphorus compounds with a P-H bond and phosphites; in all cases the α aminoacid is removed.Hexacoordinated entities are observed at low temperature during alcoholysis.
Effects of Molecular Structure on basicity. Gas-Phase Proton Affinities of Cyclic Phosphites
Hodges, Ronald V.,Houle, F. A.,Beauchamp, J. L.,Montag, R. A.,Verkade, J. G.
, p. 932 - 935 (2007/10/02)
The proton affinities of several monocyclic and bicyclic phosphite esters are determined by ion cyclotron resonance spectroscopy.The order of proton affinities is identical with the solution basicity order reported earlier.Thus, increasing steric constraint decreases the proton affinity of the phosphorus lone pair in phosphites.Moreover, the phosphorus lone pair in monocyclic six-membered-ring phosphites is more basic in the axial than in the equatorial position.Adiabatic ionization potentials are obtained from photoelectron spectra of the phosphites.Increases in ionization potential are found to parallel decreases in proton affinity.This relationship between the ionization potential and proton affinity suggests that the first ionization potential of the phosphites corresponds to ionization from the phosphorus lone pair orbital.These trends are rationalized in terms of changes in the interactions of the oxygen lone pair orbitals with the phosphorus lone pair and ?-bonding orbitals.
