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  • Articles  (19)
  • Chemistry  (19)
  • Wiley-Blackwell  (19)
  • Springer
  • 2010-2014
  • 1980-1984  (10)
  • 1975-1979  (8)
  • 1965-1969  (1)
  • 1905-1909
  • Chemistry and Pharmacology  (19)
  • 11
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 448 (1979), S. 107-114 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: N.M.R. Spectroscopic Investigations of Thiophosphazenes. II. N.M.R. Spectroscopic Investigations of 15N Labelled ThiophosphazenesCompletely 15N labelled compounds of the type 15N3P3Cl6-n(SR)n, R = Et or Ph; n = 0, 2, 4, or 6, and of the type 15N4P4Cl8-n(SR)n, R = Et; n = 0, 4, or 8, were prepared and investigated by means of both 31P n.m.r. spectroscopy and 15N n.m.r. spectroscopy respectively. The coupling constants 2JPP, in some cases only found by simulating the spectra, and the coupling constants 1JPN are given. The values of these coupling constants and their relation are discussed. The general tendency is visible, that with increasing coupling constant 1JPN the coupling constant 2JPP decreases. With increasing grade of substitution n the 15N chemical shifts are changed to higher fields.
    Notes: Vollständig 15N-markierte Verbindungen des Typs 15N3P3Cl6-n(SR)n, R = Et, Ph; n = 0, 2, 4, 6, und des Typs 15N4P4Cl8-n(SR)n, R = Et; n = 0, 4, 8, wurden synthetisiert und mit Hilfe der 31P-NMR-Spektroskopie und der 15N-NMR-Spektroskopie untersucht. Die Kopplungskonstanten 2Jpp, die in einigen Fällen nur auf dem Wege der Spektrensimulation gefunden werden, sowie die Kopplungskonstanten 1JPN werden angegeben und ihre jeweilige Änderung und ihr Verhältnis zueinander diskutiert. Es wird die allgemeine Tendenz sichtbar, daß bei zunehmender Kopplungskonstante 1JPN die Kopplungskonstante 2JPP abnimmt. Mit zunehmendem Substitutions-grad n ändern sich die 15N-chemischen Verschiebungen nach höherem Feld.
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  • 12
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 504 (1983), S. 138-146 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: NMR Spectroscopic Studies of 15N Labelled PhenylamidochlorocyclotetraphosphazenesSome endocyclically 15N labelled phenylamidochlorocyclotetraphosphazenes, 15N4P4Cl7NHPh, 6,8-15N4P4Cl6(NHPh)2 and 4,8-15N4P4Cl6(NHPh)2, as well as the corresponding exocyclically 15N labelled compounds N4P4Cl715NHPh, 6,8-N4P4Cl6(15NHPh)2 and 4,8-N4P4Cl6(15NHPh)2 were prepared, and the 31P and 15N NMR spectra were recorded. In the case of the endocyclically labelled compounds it is possible to determine the relative signs of the coupling constants 1JPN by means of spectra simulation. In order to interprete the relatively large coupling constants 3JPN to the exocyclic nitrogen a Karplus diagram was calculated and discussed.
    Notes: Einige endocyclisch 15N-markierte Phenylamidochlorocyclotetraphosphazene, 15N4P4Cl7NHPh, 6,8-15N4P4Cl6(NHPh)2 und 4,8-15N4P4Cl6(NHPh)2, sowie die entsprechenden exocyclisch 15N-markierten Verbindungen N4P4Cl715NHPh, 6,8-N4P4Cl6(15NHPh)2 und 4,8-N4P4Cl6(15NHPh)2 wurden dargestellt und die 31P- und 15N-NMR-Spektren aufgenommen. Für die endocyclisch markierten Verbindungen lassen sich die relativen Vorzeichen der Kopplungskonstanten 1JPN über Spektrensimulationen bestimmen. Zur Erklärung der verhältnismäßig großen Kopplungskonstanten 3JPN zum exocyclischen Stickstoff wurde ein Karplusdiagramm berechnet und diskutiert.
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  • 13
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: N.M.R. Spectroscopic Investigations of Thiophosphazenes. I. Reactions of Sodium Ethylthiolate with Hexachlorocyclotriphosphazatriene and OctachlorocyclotetraphosphazatetraeneBy reactions of hexachlorocyclotriphosphazatriene with an excess of sodium ethylthiolate as a suspension in ether all of the possible geminal derivatives N3P3Cl6-n(SEt)n; n = 1-6, are formed in different quantities. Products from reactions of octachlorocyclotetraphosphazatetraene with sodium ethylthiolate, N4P4Cl8-n(SEt)n, likewise contain all of the geminally substituted derivatives up to n = 8 with the exception of the derivatives with n = 1 and n = 7. Compounds with n = 3, 4, or 5 exist in two geminal isomers respectively. Nongeminal ethylthiochlorophosphazenes were not found by any reaction. The formed compounds were isolated by chromatographic methods and studied by 31P n.m.r. spectroscopy.
    Notes: Bei Umsetzungen von Hexachlorocyclotriphosphazatrien mit einem Überschuß an Natriumethylmercaptid in etherischer Suspension entstehen in unterschiedlichen Mengen alle denkbaren geminalen Substitutionsprodukte N3P3Cl6-n(SEt)n; n = 1-6. Im Reaktionsprodukt des Octachlorocyclotetraphosphazatetraens mit Natriumethylmercaptid, N4P4Cl8-n(SEt)n, lassen sich außer den Verbindungen mit n = 1 und n = 7 ebenfalls alle geminalen Substitutionsprodukte biz zu n = 8 nachweisen, wobei sich für die Verbindungen mit n = 3, 4, 5 jeweils beide geminalen Isomeren bilden. Nichtgeminale Mercaptochlorophosphazene waren bei keiner Umsetzung nachweisbar. Die entstandenen Verbindungen wurden säulenchromatographisch isoliert und 31P-NMR-spektroskopisch untersucht.
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  • 14
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 465 (1980), S. 127-130 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Phosphinophosphite - a Hydrolysis Product of ‘Phosphorous Suboxide, P4O’The hydrolytic degradation of polymer phosphorus suboxide, ‘P4O’ and of the P4-molecule in aqueous ethanolic sodium hydroxide leads in addition to wellknown substances to a compound containing two phosphorus atoms directly attached. By 31P-NMR spectroscopy it was identified as phosphinophosphite, [OP(O)(H)—PH2]-.
    Notes: Beim hydrolytischen Abbau des polymeren Phosphorsuboxids „P4O“ wie auch des P4-Moleküls in wäßrig-ethanolischer Natronlauge wird neben bereits bekannten Spezies eine zweikernige Phosphorverbindung gefunden, die mit Hilfe der 31P-NMR-Spektroskopie als Phosphinophosphit, [OP(O)(H)—PH2]-, identifiziert wurde.
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  • 15
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 480 (1981), S. 163-170 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: NMR Spectroscopic Studies of 15N Labelled Geminally Disubstituted CyclotriphosphazenesIt is demonstrated by means of some selected 15N labelled geminally disubstituted cyclotriphosphazenes, 15N3P3X4Y2 (X = Cl; Y = F, NH2, or SEt), as an example, that the coupling constants 1JPN may be of different signs. The absolute value of 1JPN is significantly influenced only by those substituents, which are bonded to the phosphorus nucleus directly concerned in the coupling. Also the 15N chemical shifts are only changed by substituents on directly bonded phosphorus atoms.
    Notes: Am Beispiel ausgewählter 15N-markierter geminal disubstituierter Cyclotriphosphazene, 15N3P3X4Y2 (X = Cl; Y = F, NH2, SEt), wird gezeigt, daß die Kopplungskonstanten 1JPN unterschiedliche Vorzeichen haben können. Auf die Größe von 1JPN haben nur jeweils diejenigen Substituenten einen merklichen Einfluß, die an den direkt an der Kopplung beteiligten Phosphorkern gebunden sind. Die 15N-chemischen Verschiebungen werden ebenfalls nur durch die Substituenten an unmittelbar benachbarten Phosphoratomen beeinflußt.
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  • 16
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: N.M.R. Spectroscopic Studies of 15N Labelled N-Phosphorylphosphazenes and Imidodiphosphoric Acid Derivatives15N labelled compounds were prepared and investigated by means of 31P- and 15N-NMR spectroscopy. The chemical shift values δP and δN, and the coupling constants 1JPN and 2JPP are discussed and interpreted qualitatively by semiempirical quantumchemical calculations (CNDO/2) using POPLE'S ΔE-model.
    Notes: 15N-markierte Verbindungen der Substitutionsreihen wurden synthetisiert und mit Hilfe der 31P- und 15N-NMR-Spektroskopie untersucht. Die chemischen Verschiebungen δP und δN sowie die Kopplungskonstanten 1JPN und 2JPP werden diskutiert und qualitativ mit Hilfe halbempirischer quantenchemischer Rechnungen (CNDO/2) im Rahmen des POPLE-schen ΔE-Modells interpretiert.
    Additional Material: 5 Ill.
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  • 17
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: N-Methyl-N-Diethoxyphosphorylamido Derivatives of Hexachlorocyclotriphosphazatriens. IV N.M.R. Spectroscopic Investigations of the Products of the Ammonolysis of N-methyl-N-diethoxyphosphorylamindo-chloro-cyclotriphosphazatrienesBroad band 1H decoupled 31P n.m.r. spectra of products obtained by ammonolysis of N-methyl-N-diethoxyphosphorylamido-chloro-cyclotriphosphazatrienes provide essential hints at the constitution of these compounds. In this connection it may be easily demonstrated, both amino groups of N3P3Cl3[NCH3P(O)(OC2H5)2][NH2]2 as well as of N3P3Cl2[NCH3P(O)(OC2H5)2]2 [NH2]2 are arranged geminally. The spectral parameters were found and verified by simulation of spectra. The simulated 31P spectra agree closely with the observed ones. The conclusions from the 31P n.m.r. spectra are complemented by these from the 1H n.m.r. spectra.
    Notes: Protonenrauschentkoppelte 31P-NMR-Spektren der aus Ammonolysen von N-Methyl-N-diäthoxyphosphorylamido-chloro-cyclotriphosphazatrienen erhaltenen Verbindungen liefern wichtige Hinweise auf deren Konstitution. In diesem Zusammenhang läßt sich zeigen, daß die beiden Aminogruppen sowohl im N3P3Cl3[NCH3P(O)(OC2H5)2][NH2]2 als auch im N3P3Cl2[NCH3P(O)(OC2H5)2]2[NH2]2 geminal angeordnet sind. Die spektralen Parameter wurden auf dem Wege der Spektrensimulation gesichert.Die simulierten 31P-Spektren stimmen gut mit den experimentellen überein.Die Aussagen aus den 1H—NMR-Spektren ergänzen sich mit denen aus den 31P—NMR-Spektren.
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  • 18
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 489 (1982), S. 126-130 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Remarks on the Evidence of Rotational Isomers in Trichlorophosphazene-N-phosphoryl-dichloride by Means of NMR SpectroscopyBy means of 31P NMR spectroscopy no rotational isomers of trichlorophosphazene-N-phosphoryldichloride are separately observable, neither in spectra of the neat compound at the immediate range of the melting temperature nor on low temperature experiments in dimethylether solution until a temperature of 158 K.
    Notes: Mit Hilfe der 31P-NMR-Spektroskopie lassen sich keine Rotationsisomere des Trichlorphosphazen-N-phosphoryldichlorids getrennt nachweisen, weder in reiner Substanz im unmittelbaren Bereich der Schmelztemperatur noch bei Tieftemperaturmessungen in Dimethylether bis zu einer Temperatur von 158 K.
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  • 19
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 3 (1965), S. 2400-2400 
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
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