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  • Chemistry  (13)
  • Analytical Chemistry and Spectroscopy  (1)
  • 1-phosphabicyclo[4.3.0]nonanes
  • 1980-1984  (13)
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Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 522-526 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Configuration of the 1,3-Dichloro-2-methyl-l-propenesDetermination of the configurations of 1,3-dichloro-2-methyl-1-propenes (1) was performed by 1H and 13C NMR spectroscopy using the isomer pairs of 1,3-dichloro-1-propenes (2), 1-chloro-2-methyl-1-propene-3-ols (3) and 1-chloro-1-propene-3-ols (4) as reference compounds. The chemical shifts, vicinal coupling constants, relative LIS value and NOE effects were in an unambiguous agreement with the (Z)-configuration of the lower-boiling isomer of 1.
    Notes: Die Konfigurationen von 1,3-Dichlor-2-methyl-1-propenen (1) werden mittels 1H- und 13C-NMR-Spektroskopie zugeordnet. Als Vergleichssubstanzen dienten die Isomeren von 1,3-Dichlor-1-propen (2), 1-Chlor-2-methyl-1-propen-3-ol (3) und 1-Chlor-1-propen-3-ol (4). Die chemischen Verschiebungen, vicinalen Kopplungskonstanten, relativen LIS-Werte und NOE-Effekte stehen mit der (Z)-Konfiguration des niedriger siedenden Isomeren von 1 eindeutig im Einklang.
    Additional Material: 5 Tab.
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 1011-1015 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1H- and 13C-N.M.R. Investigations of N-Acyl-imino-dithiocarbonic-S,S-dimethylester
    Additional Material: 3 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 34 (1983), S. 105-108 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: 13C-NMR investigations were performed with cellobiose and two cellulose samples characterized by DP 35 and 285 in the mixed solvents N-methylmorpholine-N-oxide, dimethylsulfoxide/paraformaldehyde and calcium rhodanide/formaldehyde/water. In the calcium rhodanide/formaldehyde/water mixture, similar as in paraformaldehyde/DMSO, the methylation proceeds preferentially at the C6 atom, while no specific interaction was observed between the rhodanide ion and cellulose. In all mixed solvents investigated a signal, not having been described before, was observed in the 87 to 90 ppm range. The assignment is discussed with respect to formaldehyde-containing systems.
    Notes: 13C-NMR-spektroskopische Untersuchungen wurden an Cellobiose und an zwei Celluloseproben mit DP 35 und DP 285 in den Lösungsmittelsystemen N-Methylmorpholin/N-oxid, Dimethylsulfoxid/Paraformaldehyd und Calciumrhodanid/Formaldehyd/Wasser durchgeführt. Im Calciumrhodanid/Formaldehyd/Wasser-System erfolgt ähnlich wie im Paraformaldehyd/DMSO-System eine Methylolierung bevorzugt am C-Atom 6, während zwischen Rhodanidion und Cellulose offenbar keine spezifischen Wechselwirkungen auftreten. In allen drei Lösemittelsystemen wird ein bisher nicht beschriebenes Signal im Bereich zwischen 87 und 90 ppm beobachtet; Möglichkeiten einer Deutung werden für die formaldehydhaltigen Systeme diskutiert.
    Additional Material: 2 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 21 (1983), S. 315-318 
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The analysis of the 1H NMR spectra of 2,8-dithia-1,5-diphosphabicyclo[3.3.0]octane, 2,8-dithia-1-phospha-5-azabicyclo[3.3.0]octane and 2,8-dithia-1-arsa-5-phosphabicyclo[3.3.0]octane is supported by means of 2D- J-resolved NMR measurements. The spectra suggest a preferred conformer with strong puckering of the fused five membered rings.
    Additional Material: 6 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 610-616 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Three-Component Reactions. X. Methoxychlorination of Butadiene. 2. Spectroscopic Studies of Some Diastereomeric 1, 2, 3, 4-tetrasubstituted ButanesConformations and configurations of diastereomeric butane derivatives are discussed on the basis of their 1H-n.m.r. and infrared spectra. Bulky substituents (chlorine, methoxy groups) on the terminal C—C bonds were found predominantly gauche to each other in the meso and erythro isomers but not in the dl and threo isomers.
    Additional Material: 2 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 502 (1983), S. 158-164 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 5-Aza(oxa, thia)-2, 8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octanes  -  Intramolecular Stabilized StannylenesBy the reaction of tin(II) butoxide with mercaptanes of the general type E(CH2—CH2SH)2 (E = N-t-Bu, NMe, O, S) at temperatures up to 50°C the 5-aza(oxa, thia)-2, 8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octanes I - IV are obtained in high yields. The compounds are monomeric in solution. Contrary at higher reaction temperatures (80°C) the spiro-compounds of the type [E(CH2CH2S)2]2Sn (V - VIII) are formed. Some typical stannylene reactions of I - IV with BF3, Cr(CO)6, Br2, and PhS—SPh show the high reactivity of the compounds. Their structure is investigated by 1H, 13C, and 119Sn n.m.r., i.r., and Mössbauer spectroscopy.
    Notes: Durch Umsetzung von Zinn(II)-butoxid mit Mercaptanen des allgemeinen Typs E(CH2CH2SH)2 (E = N-t-Bu, NMe, O, S) werden bei Temperaturen bis 50°C die 5-Aza(Oxa, Thia)-2, 8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octane in hohen Ausbeuten erhalten. Die Verbindungen sind monomer in Lösung. Bei höheren Reaktionstemperaturen (80°C) resultieren dagegen vorzugsweise die Spiroverbindungen des Typs [E(CH2CH2S)2]2Sn (V - VIII). Einige typische Stannylenreaktionen von I - IV mit BF3, Cr(CO)6, Br2 und PhS—SPh belegen die hohe Reaktivität der Verbindungen. Ihre Struktur wird durch 1H-, 13C-, 119Sn-NMR, IR- und Mößbauer-Spektren bewiesen.
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  • 7
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 31P and 195Pt N.M.R. Investigations on Diplatinum (I) Complexes of the Type [Pt2(μ-SPR2)2L2] (L = PR3, PhP(OPh)2, P(OPh)3, CNR)31P-, 195Pt-chemical shifts and 195Pt-31P- resp. 31P-31P-coupling constants of a series of doubly bridged diplatinum(I) complexes are reported. 31P-coordination chemical shifts of the terminal ligands of complexes of type [Pt2(μ-SPR2)2(P′R3′)2] and some of the various coupling constants are strongly influenced by the π-acceptor strength of these ligands. J(195Pt-195Pt) is found to change the sign among the series of complexes investigated. Thermal singlett triplet exitation giving rise to the paramagnetism of these complexes observed by preliminary EPR-measurements and confirmed by EHT-calculations is deduced from the large values of 2J(P-P′) and 3J(P′P′) as well as the unusually high temperature dependence of some coupling constants and other NMR features. The chemical stability of the doubly bridged core, the coordination shifts of the bridging phosphorus atoms and EHT-calculations suggest a view of aromaticity of the [Pt2(μ-SPR2)2](M-M) unit of these complexes.
    Notes: Es werden 31P-, 195Pt-chemische Verschiebungen und 195Pt31P-Kopplungskonstanten einer Reihe von doppelt verbrückten Diplatin(I)-Komplexen mitgeteilt. 31P-koordinationschemische Verschiebungen der ternären Liganden von Komplexen des Typs [Pt2(μ-SPR2)2(P′R3′)2] und verschiedene Kopplungskonstanten werden stark von der π-Akzeptor-Stärke dieser Liganden beeinflußt. J(195P-195Pt) wird innerhalb der Reihe der untersuchten Komplexe mit wechselndem Vorzeichen gefunden. Aus den großen Werten von 2J(Pt-P′) und 3J(P′P′) sowie der ungewöhnlich starken Temperaturabhängigkeit einiger Kopplungskonstanten und anderen NMR-Eigenschaften wird auf Paramagnetismus dieser Komplexe aufgrund thermischer Singlett-Triplett-Anregung geschlossen, der in vorläufigen EPR-Messungen gefunden und durch EHT-Rechnungen gestützt wird. Die chemische Stabilität des doppelt verbrückten Kerns, die koordinationschemischen Verschiebungen der Brückenphosphoratome und EHT-Rechnungen weisen auf Aromatizität der [Pt2(μ-SPR2)2](M-M)-Einheit dieser Komplexe hin.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 483 (1981), S. 145-152 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigations on the Coordination Chemistry of Zinc Dialkyls. XVI. Synthesis and Investigation of Dinorbornyl Zinc CompoundsBis(1-norbornyl)-, bis(2-norbornyl)-, and bis(7-norbornyl)zinc were synthesized from zink chloride and the corresponding Grignard compounds or norbornyl lithium compounds, respectively. The properties of these compounds differ remarkably. A detailed characterization took place by the mass, IR and 13C-NMR spectra and by investigation of the thermal decomposition and complex formation reactions.For comparison the bis(7-norbornenyl)zinc was prepared and characterized.
    Notes: Bis(1-norbornyl)-, Bis(2-norbornyl)- und Bis(7-norbornyl)-zinkNorbornyl = Bicyclo-[2.2.1]-heptyl, (Nor). wurden aus Zinkchlorid und den entsprechenden Grignardverbindungen bzw. Norbornyllithiumverbindungen synthetisiert. Die drei Substanzen unterscheiden sich beträchtlich in ihren Eigenschaften. Eine nähere Charakterisierung erfolgte durch Aufnahme und Auswertung der Massen-, IR- und 13C-NMR Spektren sowie durch Untersuchung des thermischen Zerfalls und von Komplexbildungsreaktionen.Für Vergleichszwecke wurde das Bis(7-norbornenyl)-zinkNorbornenyl = Bicyclo-[2.2.1]-hepten(2)-yl. dargestellt und untersucht.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 494 (1982), S. 189-195 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Intramolecular Mobility of Phosphin-3η-allyl Palladium Chloride ComplexesThe diastereomers of the complexes cis- and trans-2.3-diphenyl-1.3-oxaphosphorinan-3η-allyl palladiumchloride interchange. The activation parameters of the diastereomerization are estimated by line-shape analysis of the 31P - NMR signals.The exchange of allyl protons is described by 16 permutations involved in three graphes of the proposed seven modes of intramolecular movement.The cross-peaks in the 2D-exchange-1H - NMR spectrum display the exchanging protons.The results suggest a π-σ-transition together with a trigonal-bipyramidal arrangement of ligands in the transition state.
    Notes: Die Diastereomere der Komplexe cis- und trans-2,3-Diphenyl-1,3-oxa-phosphorinan-3η-allylpalladiumchlorid wandeln sich ineinander um. Die Aktivierungsparameter für diese Diastereomerisierung werden durch Linienformanalyse der 31P-NMR-Signale bestimmt.Der Positionswechsel der Allylprotonen wird durch 16 Permutationen beschrieben und in je drei Graphen den sieben vorgeschlagenen intramolekularen Bewegungsmechanismen zugeordnet. Aus den cross-peaks im 2D-Austausch-1H - NMR-Spektrum werden die miteinander im Positionswechsel befindlichen Protonen bestimmt.Die Ergebnisse sprechen für einen π-σ-Übergang mit trigonalbipyrymidaler Ligandenanordnung im Übergangszustand.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 495 (1982), S. 115-119 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Alkali Phosphorus Compounds and their Reactivity. 79. NMR Investigations of Alkali Organophosphides. IThe 31C and 31P NMR spectra display a further separation of ion-pairs of alkali-organophosphides in THF solution after addition of cryptandes . An exception presents LiP(Ph)2, T1—13C-NMR measurements suggest a tetrameric structure in THF.
    Notes: Anhand der 13C- und 31P-NMR-Daten läßt sich zeigen, daß sich die Ionenpaare der Alkali-organophosphide in THF durch Zugabe von Kryptanden entsprechend weiter trennen lassen. Eine Ausnahme bildet LiP(Ph)2, das aufgrund von T1—13C-NMR-Messungen eine tetramere Struktur in THF aufweist.
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