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  • 11
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Tetrahedron Letters 27 (1986), S. 2635-2638 
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Inorganica Chimica Acta 46 (1980), S. 167-170 
    ISSN: 0020-1693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 13
    ISSN: 0020-1693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 14
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Section 35 (1979), S. 745-755 
    ISSN: 0584-8539
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 36 (1980), S. 2316-2323 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 362 (1968), S. 281-289 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: P-chloro-2,4-diphospha-s-triazines (III) can be easily prepared by thermal cyclocondensation in vacuum. As starting materials either a bis-(trichlorophosphazo)-methylhexachloroantimonate (IV) and ammonium chloride or hexachlorodiphosphorusnitridehexachloroantimonate (V) and an amidine hydrochloride may be used. Pure 6-methyl-, 6-phenyl- and 6-dimethylamino-diphosphatriazine were synthesized. A mixture of the cis and trans isomeres of 2,4,6-triphenyl-dichlorodiphospha-triazine is obtained from the reaction of diphenyl-tetrachlorodiphosphorusnitride-chloride and benzamidine hydrochloride. The 31P and 1H chemical shifts and the 31P—1H spin couplings of the compounds are reported.6-phenyl-tetrachlorodiphosphatriazine undergoes thermal polymerisation splitting off benzonitrile. The admixture of this compound accelerates the thermal polymerisation of (NPCl2)3.
    Notes: Am Phosphor chlorsubstituierte 2,4-Diphospha-s-triazine III sind durch thermische Cyclokondensation im Vakuum gut zugänglich. Als Ausgangskomponenten dafür können entweder ein Bis-(trichlorphosphazo)-methyl-hexachloroantimonat IV und Ammoniumchlorid (Weg a) oder Hexachlordiphosphornitrid-hexachloroantimonat V und ein Amidiniumchlorid (Weg b) dienen. Das 6-Methyl-, 6-Phenyl- und 6-Dimethylamino-diphosphatriazin wurden rein dargestellt. Aus Diphenyl-tetrachlordiphosphornitrid-chlorid und Benzamidiniumchlorid erhält man das 2,4,6-Triphenyl-dichlordiphosphatriazin als Gemisch der cis-/trans-Isomeren. Die 31P- und 1H-Resonanzverschiebungen und die 31P—1H-Spinkopplungen der Produkte werden angegeben.Das 6-Phenyl-tetrachlordiphosphatriazin polymerisiert thermisch unter Abspalten von Benzonitril. Sein Zusatz beschleunigt auch die thermische Polymerisation von (NPCl2)3.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 362 (1968), S. 65-70 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The five-membered chain of bis-(trichlorophosphazo)-methyl-hexachloroantimonate reacts with NH4Cl under cyclization to 3-substituted tetrachlorodiphosphatriazine VI, and with the hydrochloride of a primary amine to 3.6-disubstituted tetrachlorodiphosphatriazinium-hexachloroantimonate IV. 31P—1H-coupling in IV hints at strengthening of the PNC-π-bond due to cyclization.
    Notes: Die fünfgliedrige Kette eines Bis-(trichlorphosphazo)-methyl-hexachloroantimonats kondensiert mit NH4Cl unter Ringschluß zum 3-substituierten Tetrachlor-diphosphatriazin VI, mit dem Hydrochlorid eines primären Amins zum 3,6-disubstituierten Tetrachlordiphosphatriazinium-hexachloroantimonat IV. Die 31P—1H-Kopplung in IV wird im Hinblick auf die Änderung der Winkel- und Bindungsverhältnisse beim Ringschluß diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 18
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 367 (1969), S. 130-143 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Disphospha-s-triazines with one or two chloro functions at each of the phosphorus atoms are substituted by ammonia and secondary amines without change of the ring skeleton. The amino-diphosphatriazines are crystalline, slightly polar, basic and, in general, hydrolytically stable substances. The ratio of cis/trans isomers of the vicinal-difunctional compounds is not greatly changed with substitution. The structure of the products is elucidated from their 1H- and 31P-NMR spectra.
    Notes: Am Phosphor tetra- und vicinal di-chlorfunktionelle Diphospha-s-triazine lassen sich mit ammoniak und sekundären Aminen ohne Veränderung des Ringgerüstes substituieren. Die Amino-diphosphatriazine sind kristalline, wenig polare, basische, hydrolytisch und acidolytisch im allgemeinen beständige Substanzen (Ausnahme: VII). Das cis/trans-Isomerenverhältnis der vicinal difunktionellen Verbindungen bleibt bei der Substitution im wesentlichen erhalten. Die Struktur der Produkte wird durch 1H- und 31P-NMR-Spektren belegt.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 19
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 527 (1985), S. 17-32 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyanophosphorus Compounds. IX. Breakdown of White Phosphorus by Cyanide Yielding Dicyanophosphides and Dicyanophosphide StructureWhite phosphorus is degraded by strong enough anionic nucleophiles X- with more or less disproportionation. With crown ether alkali, ammonium or phosphonium cyanides, X- = CN-, selectively the corresponding dicyanophosphide, P(CN)2-, is formed and a polyphosphide, preferentially P15-.[18] Crown-6-KP(CN)2 is also obtained from the reaction of P(CN)3, KF, and crown ether. In the crystal of this salt the dicyanophosphide anions (bent at phosphorus by an angle of 95°) coordinate with both nitrogen ends towards (different) cations. The PC distance (168 pm on the average) is as short as in phosphaalkenes. δ13C and JPC of P(CN)2- fit well into a correlation with the charge density at phosphorus generally valid for cyanophosphorus compounds.
    Notes: Genügend starke anionische Nucleophile X- bauen weißen Phosphor unter mehr oder weniger weitgehender Disproportionierung ab. Mit Kronenether-Alkali-, Ammonium- oder Phosphoniumcyaniden, X- = CN-, entsteht dabei selektiv das entsprechende Dicyanphosphid, P(CN)2-, und ein Polyphosphid, bevorzugt P15-.[18] Krone-6-KP(CN)2 entsteht auch bei der Umsetzung von P(CN)3 mit KF und Kronenether. Im Kristall dieses Salzes sind die am Phosphor (um 95°) gewinkelten Dicyanphosphid-Anionen mit beiden Stickstoffenden an je ein Kation koordiniert. Der PC-Abstand ist (mit durch-schnittlich 168 pm) so kurz wie in Phosphaalkenen. δ13C und JPC von P(CN)2- ordnen sich gut in einen für Cyanphosphorverbindungen allgemein geltenden Zusammenhang mit der Ladungsdichte am Phosphor ein.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 394 (1972), S. 171-186 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Amino-diphosphazenes III undergo cyclocondensation reactions when heated with phosphorus(III) compounds which bear at least two nucleofugic leaving groups. However, instead of the expected cyclotriphosphaza-dienes IV, cyclotriphosphaza-trienes V containing hydrogen bonded to phosphorus are produced. Although only V was spectroscopically identified (IR, 1H- and 31P-NMR), the existence of IV at equilibrium was demonstrated by the ease of electrophilic substitution of hydrogen by methyl iodide. The unusual prevailing of the PH-form V over the NH-form IV must be explained by extra stabilisation through formation of the cyclophosphazene π system.
    Notes: Aminodiphosphazene III gehen mit Phosphor(III)-Verbindungen. die mindestens zwei nukleophil verdrängbare Reste enthalten, eine Cyclokondensation ein. Statt der dabei zu erwartenden Cyclotriphosphaza-diene IV entstehen Cyclotriphosphaza-triene V mit phosphorständigem Wasserstoff. Während spektroskopisch nur diese Form nachweisbar ist, wird in der elektrophilen Substitution des Wasserstoffs durch Methyljodid doch auch eine Gleichgewichtsbeteiligung von IV erkennbar. Die ungewöhnliche Begünstigung des PH-Prototropen V läßt auf einen erhöhten Energiebeitrag der Phosphazenbindung im cyclisch alternierenden System, d. h. auf eine Extrastabilisierung durch die Ausbildung des Cyclotriphosphaza-triens schließen.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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