Library

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
  • 1980-1984  (2)
  • Chemistry  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 501 (1983), S. 191-198 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contribution to the Chemistry of Phosphorus-Nitrogen Compounds. Reaction of Cl2(O)P—NH—P(O)Cl2 with TetrahydrofuranAs well as many phosphorus compounds, the imidodiphosphoryl tetrachloride HN(P(O)Cl2)2 reacts with a large excess of tetrahydrofuran to give the polytetrahydrofuran. Otherwise, if we use smaller molecular ratios THF/HN(P(O)Cl2)2 (1/2 to 3) a polytetrahydrofuran with short chains and N(ω-hydroxypolytetramethylenoxy)imidodiphosphoryl tetrachloride R—N(P(O)Cl2)2; R = H(O(CH2)4)n- are obtained at 22° or 30°C.The 1H and 31P n.m.r. spectra show that oxonium ions are formed with progressive additions of THF to HN(POCl2)2/CCl4 solution. Then two mechanisms have been considered by nucleophilic attack on carbon α of oxonium ion coming from: the free electronic dublett on oxygen of THF to give polytetrahydrofuran or (and) from the nitrogen of imido diphosphoryl tetra chloride anion ((Cl2OP)2N)- to obtain N(ω-hydroxypolytetramethylenoxy)imidodiphosphoryl tetrachloride.
    Notes: Wie im Falle vieler Phosphorverbindungen führt die Reaktion des Imidodiphosphoryltetrachlorids mit einem großen Überschuß Tetrahydrofuran zur Polymerisation des letzteren. Arbeitet man hingegen mit kleinen THF/HN(P(O)Cl2)2 Molverhältnissen (1/2 bis 3), so entsteht bei 22°C bzw. 30°C neben kurzen Poly-THF-Ketten N(ω-hydroxypolytetramethylenoxy)imidodiphosphoryltetrachlorid R—N(P(O)Cl2)2; R = H(O(CH2)4)n-. 1H- und 31P-NMR-Spektren bei stufenweiser Zugabe von THF zu einer HN(P(O)Cl2)2/CCl4-Lösung zeigen, daß sich ein Oxonium-Komplex bildet, der einen nukleophilen Angriff auf das in α-Stellung zum Sauerstoff stehende Kohlenstoffatom durch das Sauerstoffatom des THF oder durch das Stickstoffatom des (N(P(O)Cl2)2)--Anions bewirkt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 489 (1982), S. 204-210 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contribution to the Chemistry of Phosphorus Nitrogen Compounds. Reaction of Cl3P=N—P(O)Cl2 with TetrahydrofuranAs well as many phosphorus compounds, the trichlorophosphazene phosphoryldichloride Cl3P=N—P(O)Cl2 reacts at 30°C with a large excess of tetrahydrofuran to give the polytetrahydrofuran. Otherwise, if we use higher molecular ratios Cl3P=N—P(O)Cl2/THF (respectively 1/3 and 1) we obtain at 30°C beside polytetrahydrofuran the N chlorobutylimidodiphosphoryltetrachloride. This last compound is the main one obtained at 60°C and is probably formed by rearrangement of the O chlorobutyl isomer.However the formation of small quantities of polytetrahydrofuran chains linked with phosphorus cannot be avoided.
    Notes: Läßt man Trichlorophosphazenphosphoryldichlorid Cl3P=N—P(O)Cl2 bei 30°C mit Tetrahydrofuran in großem Überschuß reagieren, so beobachtet man, wie im Falle vieler Phosphorverbindungen, die Polymerisation des Tetrahydrofurans. Arbeitet man hingegen mit höheren Cl3P=N—P(O)Cl2/THF Molverhältnissen 1/3 bis 1, so bildet sich bei 30°C neben Polytetrahydrofuran N-Chlorobutylimidodiphosphoryltetrachlorid. Bei 60°C ist letzteres im Reaktionsgemisch überwiegend. Es bildet sich vermutlich durch Umlagerung des O-Chlorobutyl-Isomeren. Das Entstehen der am Phosphor gebundenen Polytetrahydrofuranketten kann jedoch nicht ganz vermieden werden.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...