ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Chemistry  (18)
  • Diazadiphosphetine  (1)
  • Organylfluorophosphanes
  • 1995-1999  (3)
  • 1980-1984  (4)
  • 1975-1979  (11)
Collection
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 320 (1978), S. 389-394 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: α-Substituted Phosphonates. XXXI. The Reaction of N,N,N′,N′-Tetramethyl Chloroformamidinium Chloride with P(III) CompoundsN,N,N′,N′-Tetramethyl chloroformamidiniumchloride (4) does not react with triethyl phosphite (TEP) or isopropyl diphenylphosphinate to give the expected bisphosphoryl derivatives 7 and 11, respectively, but primarily the monophosphorylated amidinium salts 6 and 10 respectively. The phosphine oxide 10 is stable, while 6 undergoes an elimination of ethyl chloride to the betain 8. Even under more drastic conditions the reaction of 4 or 8 with TEP does not lead to the expected bis(dimethylamino)bisphosphonate 7, but to the monoaminated bisphosphonate 1, involving a reduction step. Similar reduction has been observed under mild conditions in Michaelis-Arbusov reaction of dichloromethylenimonium chloride, yielding the expected trisphosphonate 2 and the bisphosphonate 1 as a by-product.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 894-900 
    ISSN: 0044-2313
    Keywords: Fluoridolysis ; Imidodiphosphoryl Compounds ; Methanediphosphonic Acid Derivatives ; Azadiphosphetidine ; Pentafluorophosphates ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fluoridolysis of Diphosphoryl CompoundsThe behaviour of diphosphoryl compounds [X2(O)P]2Y in fluoridolysis reactions is decisively determined by the nature of the bridging group Y. In the cases of Y = NH and CH2 and X = Cl [F2P(O)]2N- and [F2P(O)]2CH2 are obtained quantitatively. For Y = NPh, O, and CH2 the formation of phosphorylated pentafluorophosphates [F5P—Y—POX2]- is observed. Amido and ester derivatives containing fluorine (see table 2) are obtained from the corresponding chloro compounds by Cl/F exchange. Fluoridolysis of the azadiphosphetidine 19 results in the formation of acyclic 19 a.
    Notes: Das Fluoridolyseverhalten von Diphosphorylverbindungen [X2(O)P]2Y wird maßgeblich durch die Brückengruppe Y bestimmt. Im Falle von Y = NH und CH2 sowie X = Cl werden quantitativ [F2P(O)]2N- und [F2P(O)]2CH2 erhalten. Für Y = NPh, O und CH2 wird die Bildung von phosphorylierten Pentafluorophosphaten [F5P—Y—POX2]- beobachtet. Aus chlorhaltigen Amido- und Esterderivaten werden durch Chlor-Fluor-Austausch die entsprechenden Fluorderivate erhalten (siehe Tab. 2). Die Fluoridolyse des Azadiphosphetidins 19 ergibt die acyclische Verbindung 19 a.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 901-903 
    ISSN: 0044-2313
    Keywords: Fluoridolysis ; Cyclophosphazenes ; Polyphosphazenes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fluoridolysis of Cyclophosphazenes and Lineary PolyphosphazenesThe fluorination of nongeminal trans P3N3Cl4(NEt2)2 and nongeminal trans P3N3Cl3(NEt2)3 with the fluorination agent Et3N · 0,6 HF (B) occurs under retention of configuration yielding P3N3Cl2F2(NEt2)2 and P3N3F4(NEt2)2 or P3N3F3(NEt2)3, respectively. P3N3Cl6 is nearly quantitatively converted into P3N3F6. Poly(dichlorophosphazene) reacts to a poly(difluorophosphazene), (PNF2)n, distinguished by a moderate solubility in THF.
    Notes: Die Fluorierung von nichtgeminalem trans-P3N3Cl4(NEt2)2 und nichtgeminalem trans-P3N3Cl3(NEt2)3 mit dem Fluorierungsagens Et3N · 0,6 HF (B) verläuft unter Erhalt der Konfiguration zu P3N3Cl2F2(NEt2)2 und P3N3F4(NEt2)2 bzw. P3N3F3(NEt2)3. P3N3Cl6 wird nahezu vollständig in P3N3F6 überführt. Poly(dichlorphosphazen) reagiert zu einem THF-löslichen Poly(difluorphosphazen), (PNF2)n.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 411 (1975), S. 148-152 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Properties of Lineary PhosphorylchlorphosphazenesThe phosphorylchlorphosphazenes, Cl2(O)P - [N=PCl2]n - Cl, (n = 1, 2, 3) react like POCl3 with hexamethyldisilazan forming silylamides, Cl2(O)P - [N = PCl2]n - NHSi(CH3)3, (n = 0, 1, 2, 3). From these are obtained the phosphorylchlorphosphazenes by reaction with PCl5 containing one group  - N = PCl2 more.
    Notes: Die Phosphorylchlorphosphazene, Cl2(O)P - [N=PCI2]n - Cl, (n = 1, 2, 3) reagieren ebenso wie POCl3 mit Hexamethyldisilazan zu den Silylamiden, Cl2(O)P - [N=PCl2]n - NHSi(CH3)3, (n = 0, 1, 2, 3), aus denen mit PCl5 die um eine Phosphazengruppe verlängerten Phosphorylchlorphosphazene erhalten werden.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Temperature Dependence Investigations of 31P Chemical Shifts of Trialkoxyphosphazene N-phosphoryldialkylestersThe 31P NMR spectra of a series of trialkoxyphosphazene-N-phosphoryldialkylesters, (RO)3P=N—P(O)(OR′)2, where R = R′ = Et; R = Et, R′ = Bu; R = Bu, R′ = Et; R = R′ = Bu; and R = R = R′ = Hex respectively, and of trichlorophosphazene-N-phosphoryldichloride were investigated at various temperatures. The temperature dependence of chemical shift of phosphorus belonging to the phosphazene group is multiplicately larger than that of phosphorus belonging to the phosphoryl group. This fact also could be confirmed for other simple phosphazene and phosphoryl compounds. As discussed this different temperature dependence of 31P chemical shift is not a consequence of the medium but of the molecular structure.
    Notes: Für eine Reihe von Trialkoxyphosphazen-N-phosphoryldialkylestern, (PO)3P=N—P(O)(OR′)2, wobei R = R′ = Et; R = Et, R′ = Bu; R = Bu, R′ = Et; R = R′ = Bu bzw. R = R′ = Hex waren, sowie für Trichlorphosphazen-N-phosphoryldichlorid wurden jeweils 31P-NMR-Spektren bei verschiedenen Temperaturen aufgenommen. Es zeigte sich, daß die Temperaturabhängigkeit der chemischen Verschiebung für den Phosphor der Phosphazen-Gruppierung um ein mehrfaches größer ist als die für den Phosphor der Phosphoryl-Gruppierung. Dies konnte auch allgemein für andere einfache Phosphazen- und Phosphoryl-Verbindungen bestätigt werden. Es wird diskutiert. daß diese unterschiedliche Temperaturabhängigkeit der 31P-chemischen Verschiebung nicht auf Medieneinflüsse, sondern auf die molekulare Struktur zurückzuführen ist.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 415 (1975), S. 1-7 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the „HCl- Condensation“ of Phosphorus OxytriamideThe reaction of HCl with phosphorus oxytriamide suspended in ether leads to highly cross-linked imidopolyphosphates. By substitution of amido group by chlorine atoms amidochlorides of phosphoric acid are also formed which are soluble in ether. Only traces of oligomeric μ-imidophosphoric acid amides are obtained. The intermediate formation of phosphorylimide amide, OP(=NH)NH2, and phosphoryl imide chloride, OP(=NH)CI, is assumed to explain the experimental results.
    Notes: Die Reaktion von HCl mit Phosphoroxidtrimid in ätherischer Suspension führt zur Bildung stark vernetzter Imidopolyphosphate. Durch Substitution von Amidgruppen durch Chloratome entstehen außerdem ätherlösliche Amidchloride der Phosphorsäure. Oligomere μ-Imidophosphorsäureamide werden nur in Spuren erhalten. Zur Interpretation der experimentellen Befunde wird die intermediäre Bildung von Phosphorylimidamid, OP(=NH)NH2, und Phosphorylimidchlorid, OP(=NH)CI, angenommen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 433 (1977), S. 200-206 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Constitution of the Trimethylsilyl Derivatives of Imidodiphosphoryl CompoundsEsters and dialkylamides of the imidodiphosphoric acid react with hexamethyl-disilazane to form trimethylsilyl derivatives. 1H-, 29Si-, and 31P-NMR data show the trimethylsilyl group to be bond to oxygen with rapid reversible exchange between both phosphoryloxygen atoms.
    Notes: Ester und Dialkylamide der Imidodiphosphorsäure reagieren mit Hexamethyldisilazan zu den Trimethylsilylderivaten. Aus 1H-, 29Si- und 31P-NMR-Daten folgt, daß die Trimethylsilylgruppe über Sauerstoff gebunden ist und einem schnellen reversiblen Austausch zwischen den beiden Phosphorylsauerstoffatomen unterliegt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 437 (1977), S. 269-274 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Formation and Constitution of a Heterocyclic Phosphorus BetaineThe zwitter ionic 2,2,6,6-tetrakis(diethylamido)-4,4-Dioxo-1,3,5,2λ5,4λ5,6λ5-azadioxatriphosphorin (3) is formed as a cristalline byproduct in the reaction of octaethyl imidodiphosphoryl tetramide derivatives, {[(Et2N)2P(O)]2N}Y (Y = H, Na, SiMe3), with phosphorus(V) chlorides (PCl5, POCl3, ClP(O)(OEt)2). It is obtained from the primary reaction products in a secondary reaction. Its constitution was revealed by 31P-n.m.r.-spectroscopy and by synthesis of the 15N-labeled compound. From O-Diethoxyphosphorylated octaethyl imidodiphosphoryl tetramide the compound 3 is obtained only in presence of water traces and agents providing HCl like e. g. ClSiMe3 or ClP(O)(OEt)2.
    Notes: Bei der Umsetzung von Octaäthylimidodiphosphoryltetramid-Derivaten, {[(Et2N)2P(O)]2N}Y (Y = H, Na, SiMe3), mit Phosphor(V)-chloriden (PCl5, POCl3, ClP(O)(OEt)2) entsteht aus den primären Reaktionsprodukten in einer Folgereaktion das zwitterionische 2,2,6,6-Tetrakis(diäthylamido)-4,4-Dioxo-1,3,5,2λ5,4λ5,6λ5-azadioxatriphosphorin (3) als kristallines Nebenprodukt. Die Konstitutionsermittlung erfolgte mittels 31P-NMR-Spektroskopie und durch Synthese der 15N-markierten Verbindung. Aus dem O-Diäthoxyphosphorylierten Octaäthylimidodiphosphoryltetramid bildet sich 3 nur in Gegenwart von Wasserspuren und HCl-liefernden Reagenzien, wie ClSiMe3 oder ClP(O)(OEt)2.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Formation and N.M.R.-Spectroscopic Characterization of Alk-(ar-)oxy Derivatives of Trichlorophosphazene-N-phosphoryldichloride, Cl3P=N—P(O)Cl2, Imido- and N-Methylimidodiphosphoryltetrachloride, Cl2P(O)NHP(O)Cl2 and Cl2P(O)N(CH3)P(O)Cl2The ester chlorides and esters P2NOCl5-x(OR)x (x = 1-5), P2(NH)O2Cl4-x(OR)x (x = 1-4) and P2(NCH3)O2Cl4-x(OR)x (x = 1-4) derived from the title compounds by substitution of chlorine atoms by alk- or aroxy groups are characterized by their 31P-n.m.r. data. The possibilities for forming these compounds by alcoholysis, chloridolysis, dealkylation and P—N-bond formation are discussed.
    Notes: Die sich von den Titelverbindungen durch Substitution der Chloratome durch Alk- bzw. Aroxygruppen ableitenden Esterchloride und Ester P2NOCl5-x(OR)x (x = 1-5), P2(NH)O2Cl4-x(OR)x (x = 1-4) und P2(NCH3)O2Cl4-x(OR)x(x = 1-4) werden 31P-NMR-spektroskopisch charakterisiert. Die Möglichkeiten zur Bildung dieser Verbindungen durch Alkoholyse, Chloridolyse, Entalkylierungs- und P—N-Bindungsknüpfungsreaktionen werden vorgestellt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 465 (1980), S. 120-126 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Lineary and Branched Phosphazenes from N-silylated Phosphoryl AmidesThe use of N-silylated phosphoryl amides in the reaction with PCl5 favours the KIRSANOV reaction and reduces undesirable substitution reactions. However, silylated monoamides, X2P(O)NHSiMe3 (X = OEt, NEt2), do not give the expected trichlorophosphazenes but the isomeric N-dichlorophosphoryl phosphazenes, Cl2P(O)—N=PClX2, which are also formed in the reaction of (EtO)2P(O)NCl2 with PCl5. As the first phosphoryl-P, P-bis(trichlorophosphazene) (EtO)P(O)(N=PCl3)2 could be obtained in the reaction of PCl5 with the silylated diamide (EtO)P(O)(NHSiMe3)2. Tris reactivity of silylated amides to P—Cl compounds decreases in the row PCl5 〉 POCl3 〉 CIP(O)(OEt)2 〉 ClP(O)(NEt2)2. In the reaction with phosphoryl chlorides the preferred formation of compounds with P—NH—P bridges could not be observed.
    Notes: Die Verwendung N-silylierter Phosphorylamide begünstigt bei der Umsetzung mit PCl5 die KIRSANOV-Reaktion und drängt unerwünschte Substitutionsreaktionen zurück. Silylierte Monoamide, X2P(O)NHSiMe3 (X = OEt, NEt2), geben mit PCl5jedoch nicht die erwarteten Trichlorphosphazene, sondern die isomeren N-Dichlorphosphorylphosphazene, Cl2P(O)-N=PClX2, die auch bei der Reaktion von (EtO)2P(O)NCl2 mit PCl5 entstehen. Als erstes Phosphoryl-P, P-bis-(trichlorphosphazen) konnte (EtO)P(O)(N=PCl3)2 durch Umsetzung des silylierten Diamids (EtO)P(O)(NHSiMe3)2 mit PCl5 erhalten werden. Tris(trimethylsilyl)phosphoryltriamid, OP(NHSiMe3)3, bildet mit PCl5 das Triphosphazen [ClP(N=PCl3)3]Cl. Die Reaktivität der silylierten Amide gegenüber P—Cl-Verbindungen nimmt in der Reihe PCl5 〉 POCl3 〉 ClP(O)(OEt)2 〉 ClP(O)(NEt2)2 ab. Eine bevorzugte Bildung von Verbindungen mit P—NH—P-Brücken konnte bei der Umsetzung mit Phosphorylchloriden nicht beobachtet werden.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...