- X-ray crystal structures and DFT calculations of differently charged aminocyclophosphazenes
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Molecular structures of hexakis(amino)cyclotriphosphazene, N3P3(NH2)6, neutral and cationic forms of hexakis(ethylamino)cyclotriphosphazene, N3P3(NHC2H5)6,
- Vorontsov, Ivan I.,Tur, Dzidra R.,Papkov, Vladimir S.,Antipin, Mikhail Yu.
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- Phosphazene compound, composite containing phosphazene compound, flame retardant containing composite and application
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The invention relates to a phosphazene compound, a composite containing the phosphazene compound, a flame retardant containing the composite and application. The crystal form of the cyclotriphosphazene derivative flame retardant synthesized by using the method is most stable, and the cyclotriphosphazene derivative flame retardant is high in heat stability and high in flame retardant efficiency; moreover, when the crystal type cyclotriphosphazene derivative flame retardant synthesized by using the method is added into a material, such as engineering plastics, general-purpose plastics, a lithiumion battery electrolyte, a flame retardant fabric and flame retardant paper, a high flame retardant performance is achieved, the crystal form is stable, the flame retardant is resistant to drip, onlyan extremely small adding amount is needed, the flame retardant performance of the material can reach the V-0 standards, and other properties of the material are little affected.
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Paragraph 0364-0365; 0368; 0369
(2019/01/23)
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- Nitrido-Sodalites. II. Synthesis, Crystal Structure, and Properties of M(6+(y/2)-x)H(2x)[P12N24]Z(y) with M=Fe, Co, Ni, Mn; Z=Cl, Br, I; 0<=x<=4; y<=2
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The nitrido sodalites M(6+(y/2)-x)H(2x)[P12N24]Z(y) with M=Fe, Co, Ni, Mn; Z=Cl, Br, I; 0=x=4; y=2 are obtained by the reaction of HPN2 or [PN(NH2)2]3 with the metal halogenide MZ2 (T=700°C). The compounds are isotypic to Zn(7-x)H(2x)[P12N24]Cl2. An increase of the ionic radii of the cations or anions results in an expansion of the lattice which iscaused by an increase of the P-N-P angle. The influence of the cation i s more dominant than that of the anion. By reacting [PN(NH2)2]3 with metal halogenide (MZ2) hydrogen free, X-ray amorphous products are obtained. The formation of the chloride-containing P-N sodalite in this reactionbegins at temperatures below 450°C.
- Schnick, W.,Stock, N.,Luecke, J.,Volkmann, M.,Jansen, M.
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- Hydrolysis pathways for aminophosphazenes
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The hydrolysis behavior of the aminocyclotriphosphazenes (NPR2)3, where R = NH2, NHCH3, NHCH2COOC2H5, NHCH2CONHCH3, N2C3H3 (imidazolyl), NHCH2CF3, NHCH2C6H5, NHC6H5, NC4H4 (pyrrolyl), NC4H8 (pyrrolidino), NC5H10 (piperidino), and NC4H8O (morpholino), has been examined in water or aqueous dioxane, acid, and base. The ease of hydrolysis in aqueous dioxane declined with changes in R in the order N2C3H3 > NHCH2COOC2H5 > NHCH2CONHCH3 > NH2 > NHCH3 > NHC6H5 > NHCH2C6H5 > NHCH2CF3 > NC4H4, NC4H8, NC5H10, and NC4H8O. Two different but interconnected mechanistic pathways appear to be followed. In the first, hydrolytic removal of one amino residue from phosphorus occurs to yield species of type N3P3R5OH before cleavage of the phosphazene ring takes place. In the second, cleavage of the phosphazene ring is a fast reaction following protonation of the ring nitrogen atoms. Those compounds which contained amino acid ester or amide side groups hydrolyzed only after prior initial conversion of the ester or amide units to free carboxylic acid groups. Comparisons are made with the behavior of the open-chain high polymers of formula (NPR2)n, where R = NHCH3, NHCH3 and N2C3H3, NHCH2COOC2H5, and NHCH2CONHCH3, and the overall trends are considered in terms of the potential biomedical behavior of these compounds.
- Allcock,Fuller,Matsumura
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p. 515 - 521
(2008/10/08)
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