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  • Wiley-Blackwell  (56)
  • American Geophysical Union  (2)
  • 1
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    Inferences on the magnetic domain state of leg 37 basalts (1976)
    American Geophysical Union
    Details
    Publication Date: 1976-08-10
    Print ISSN: 0148-0227
    Electronic ISSN: 2156-2202
    Topics: Geosciences
    Published by American Geophysical Union
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    PAPER CURRENT
  • 2
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    Magnetism of basalt cores from the Nazca Plate and implications for magnetic anomaly interpretation (1976)
    American Geophysical Union
    Details
    Publication Date: 1976-08-10
    Print ISSN: 0148-0227
    Electronic ISSN: 2156-2202
    Topics: Geosciences
    Published by American Geophysical Union
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    PAPER CURRENT
  • 3
    Electronic Resource
    Electronic Resource
    Photooxidation von Leukofarbstoffen. VIII. Kurzzeitspektroskopische Untersuchungen zum Mechanismus der Photooxidation von Leukokristallviolett (1984)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 326 (1984), S. 899-909 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Photooxidation of Leuco Dyes. VIII. Time Resolved Investigations of the Mechanism of the Photooxidation of Leucocrystal VioletThe photooxidation of leucocrystal violet has been reexamined by means of conventional and laser flash photolysis as well as spin trap experiments. Three radical transients have been observed and assigned to the cation radical (λmax ≈ 490, 530 nm), the neutral radical with one—NCH3—CH2 moiety (λmax ≈ 480 nm) and the triphenyl methyl radical derivative (λmax ≈ 400 nm).
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19843260607
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  • 4
    Electronic Resource
    Electronic Resource
    13C-kernmagnetische Resonanzspektren der PhenylfulgideXI. Mitt. zur Photochemie der Fulgide; X. Mitt. s. [1]. (1984)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 326 (1984), S. 222-232 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Carbon-13 Nuclear Magnetic Resonance Spectra of PhenylfulgidesThe carbon-13 chemical shifts are determined in a series of phenylfulgides in order to investigate steric and electronic influences of substituents. By means of the shift differences between suitably substituted compounds results can be obtained as to the relative variation of the rotation angles of the phenyl rings as well as to te angle alterations between the exocyclic double bonds and the anhydride ring. Introducing 4-CH3O- and 4-NO2-groups at the phenyl rings the substituent induced alterations of the carbon-13 chemical shifts and the π-polarization effects related with it are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19843260206
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  • 5
    Electronic Resource
    Electronic Resource
    Elektronische und sterische Substituenteneinflüsse auf die UV/VIS-Absorptionsspektren der PhenylfulgidisomerenXII. Mitt. zur Photochemie der Fulgide, XI. Mitt. s. [1] (1984)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 326 (1984), S. 233-247 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Electronic and Steric Substituent Influences on the U.V./VIS-Absorption Spectra of Phenylfulgide IsomersThe u.v./vis spectral data of a large number of phenylfulgides (E-, Z-, E-E-, E-Z-, Z-E-, Z-Z-isomers, 1.8a-dihydronaphthalenes) are presented. An increase of the number of phenyl rings as well as substitution of the phenyl rings cause correlatable bathochromic spectral shifts. Steric influences became obvious by introducing methyl groups, by coplanarization of phenyl groups and in the series of isomers. By means of PPP calculations shifts in position and/or intensity of absorption bands are ascribed to the substituent effects.The calculated band polarization of E(E-E)-isomers are in agreement with the results of polarization spectra in oriented liquid crystal mesophases. The polarization spectra allow the assignment of the longwave absorption band to the S2 ← S0 and S1 ← S0 electronic transitions for E-E-Isomers with a C2v-symmetry.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19843260207
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  • 6
    Electronic Resource
    Electronic Resource
    Direkte und sensibilisierte Photoisomerisierung der α,δ-PhenylfulgideXIII. Mitt. zur Photochemie der Fulgide; XII. Mitt. s. [1] (1984)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 326 (1984), S. 705-720 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Direct and Sensitized Photoisomerization of α,δ-PhenylfulgidesThe photoreactions starting from the E- and E-E-isomers of mono-, di-, tri- and tetra-(substituted-)phenylfulgides are investigated. The phenylfulgides show strong steric interactions in the molecular framework. For that reason internal conversion is the main deactivation process which increases in the series of mono-, tri- and tetraphenylfulgides. The α,δ-di-(substituted-)-phenylfulgides show the highest photoreactivity. At room temperature in no case luminescence is observed from any E(E-E)-, Z(E-Z, Z-E)- or Z-Z-phenylfulgid isomer of the substances under study. Intersystem crossing cannot compete neither with thermal deactivation nor can it be observed by applying both the internal and external heavy atom effect. The phenylfulgides show typical ππ*-photoreactivity: in the singlet state E-Z-isomerization about one double bond competes with electrocyclic ring closure; in the triplet state only simultaneous E-Z-isomerization about the two double bonds is observed. The steric and electronic substituent influences on the photoreactivity are interpreted. A first qualitative model of the isomerization reactions of the fulgides in the excited states is established.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19843260502
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  • 7
    Electronic Resource
    Electronic Resource
    Untersuchungen an Selen-Sauerstoff-Verbindungen. IV. Über den Zustand wäßriger Alkalihydrogen- und Alkalipyroselenitlösungen (1960)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 303 (1960), S. 46-52 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The RAMAN spectra of aqueous solutions of NaHSeO3, KHSeO3, Na2Se2O5, K2Se2O5, (NH4)2Se2O5, and that of NaDSeO3 in D2O are given at different concentrations. All spectra are identical. In these solutions following equilibrium is existing: O2SeOSeO2″ + H2O ⇄ 2 HOSeO2-. Tautomerism of the HOSeO2--ion is excluded. The splitting of the OH-stretching band of HOSeO2- in the IR-spectrum of a saturated solution of KHSeO3 in H2O is correlated to strong H-bonds.
    Notes: Es werden die- RAMAN-Spektren von NaHSeO3, KHSeO3, Na2Se2O5, K2Se2O5 und (NH4)2Se2O5 in H2O und das von NaDSeO3 in D2O bei verschiedenen Konzentrationen mitgeteilt. Sämtliche Spektren sind identisch (siehe die analogen S-Verbindungen). Es wird gezeigt, daß in diesen Lösungen Pyroselenitionen und Hydrogenselenitionen nebeneinander im Gleichgewicht vorliegen: \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm O}_{\rm 2} {\rm SeOSeO}_{_2}^{''} + {\rm H}_{\rm 2} {\rm O} \mathbin{\lower.3ex\hbox{$\buildrel\textstyle\rightarrow\over {\smash{\leftarrow}\vphantom{_{\vbox to.5ex{\vss}}}}$}} 2{\rm HOSeO}_{\rm 2}^{'} $$\end{document} Eine Tautomerie der Hydrogenselenitionen wird ausgeschlossen. Die Aufspaltung der OH-Valenzbande des Hydrogenselenitions im IR-Spektrum einer gesättigten wäßrigen KHSeO3-Lösung wird auf starke H-Brücken zurückgeführt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19603030107
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  • 8
    Electronic Resource
    Electronic Resource
    Untersuchungen an Selen-Sauerstoff-Verbindungen. VII. Die Schwingungsspektren einiger Dialkylselenite (1960)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 303 (1960), S. 79-84 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: RAMAN and IR-spectra of (CH3O)2SeO, (C2H5O)2SeO, and CH3O · SeO · OC2H5 are given and discussed. Because of the fact that couplings between the CH-oscillations within the alkyl groups and between CH-oscillations and that of the C—O—-Se-sceletons are allowed to be neglected, it is possible to discuss the spectra.
    Notes: Es werden die RAMAN- und IR-Spektren von Dimethylselenit, Diäthylselenit und Methyläthyselenit mitgeteilt und diskutiert. Kopplungen zwischen den Alkylschwingungen der einzelnen Molekeln einerseits und zwischen den Alkylschwingungen und denen der COSe-Gerüste andererseits sind vernachlässigbar klein. Dadurch ist die Zuordnung der Gerüstfrequenzen möglich.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19603030110
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  • 9
    Electronic Resource
    Electronic Resource
    Untersuchungen an Selen-Sauerstoff-Verbindungen. VIII. Die Schwingungsspektren der Alkalisalze der Methan- und Äthanseleninsäure (1960)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 305 (1960), S. 78-87 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The RAMAN-spectra of CH3SeO2Na, CH3SeO2K, C2H5SeO2Na, and C2H5SeO2K in solid state and in aqueous solution and the IR-spectra of these salts pressed in KBr are discussed. The ion C2H5SeO2 shows in solution rotational isomerism.
    Notes: Es werden die RAMAN-Spektren von CH3SeO2Na, CH3SeO2K, C2H5SeO2Na und C2H5SeO2K im festen Zustand und in wäßriger Lösung sowie die IR-Spektren dieser Salze gepreßt in KBr mitgeteilt und diskutiert. Die gefundenen Spektren stimmen gut mit den Erwartungsspektren überein. Das Äthanselenination liegt im gelösten Zustand in zwei rotationsisomeren Strukturen vor.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19603050108
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  • 10
    Electronic Resource
    Electronic Resource
    Untersuchungen an Selen-Sauerstoff-Verbindungen. IX. Die Schwingungsspektren der Methan- und Äthanseleninsäure (1960)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 305 (1960), S. 88-97 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The RAMAN-spectra of CH3SeO2H and C2H5SeO2H in different states (solid, in H2O, in CH3OH) and the IR-spectra in KBr are given and discussed. Strong H-bonds, which are strongest in CH3SeO2H, cause association in solid and in solved state. The molecule C2H5SeO2H forms in solution (in H2O, in CH3OH, in KBr) two rotational isomeric configurations. In contrast to the compounds H2SeO3 and RO · SeO · OH, methanol does no esterify CH3SeO2H and C2H5SeO2H. Some chemical, physical, and physiologic properties are given.
    Notes: Es werden die RAMAN-Spektren der Methan- und Äthanseleninsäure in verschiedenen Zuständen (fest, in H2O, in CH3OH) sowie die IR-Spektren in KBr mitgeteilt und diskutiert. Starke H-Brückenbindungskräfte, die in der Methanverbindung etwas stärker sind, bewirken sowohl im festen Zustand als auch in Lösung Assoziation. Die Äthanseleninsäure existiert in Lösung (in H2O, in CH3OH, in KBr) in zwei rotationsisomeren Strukturen. Keine der Säuren wird durch Methanol im Gegensatz zur selenigen Säure und den alkylselenigen Säuren verestert. Einige chemische, physikalische und physiologische Eigenschaften werden angegeben.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19603050109
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