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  • 1985-1989  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Trapping and reactivity of electrons in methanol-isopropanol glasses irradiated at 77 K (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 125 (1988), S. 91-96 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Mixtures of methanol and isopropanol in a ratio (v/v) varying from 9∶1 to 1∶9 have been gamma-irradiated at 77 K and relative yields of trapped electrons have been measured. The reactivity of the trapped electrons towards acetone and uranyl nitrate has been studied at various methanol isopropanol ratios. On the basis of the results, an attempt has been made to assess the relative importance of the reaction of the electron with the solute prior to trapping with respect to the tunnelling reaction of the trapped electron with the solute.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041753
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Reactions of trapped electrons in methanol-isopropanol glasses irradiated at 77 K (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 130 (1989), S. 409-415 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Trapped electron (e T − ) reactivity in methanol-isopropanol glasses irradiated at 77 K has been studied as a function of trap-depth, the variation in the trap depth being achieved by varying the methanol:isopropanol ratio. Benzyl chloride and carbon disulfide have been used as scavengers. In the case of the glasses containing benzyl chloride, the observed yield of the benzyl radical has been correlated with the trapping efficiency of the matrix. The data has been interpreted with the aim of assessing the relative importance of tunnelling in the scavenging of electrons in low temperature glassy matrices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041359
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Hydrogen peroxide yields in methanol-water mixtures gamma-irradiated at room temperature and 77 K (1986)
    Springer
    Journal of radioanalytical and nuclear chemistry 98 (1986), S. 105-114 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Hydrogen peroxide yields in air-saturated methanol-water mixtures with methanol: water volume ratios varying from 1∶99 to 100∶0, produced by60Co gamma-irradiation boith at room temperature and at 77 K have been determined. At room temperature, G(H2O2) values are almost constant over the entire range of methanol: water ratios. However, for irradiations at 77 K, G(H2O2) values increase with increasing methanol concentration up to the volume ratio of 98∶2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02060437
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Cationic Ruthenium(II) Carbonyl Complexes with Nitrile LigandsNCL Communication No. 3625. (1985)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 527 (1985), S. 203-207 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Kationische Carbonyl-Ruthenium(II)-Komplexe mit Nitril-LigandenStabile kationische Komplexe vom Typ [RuCO(PPh3)2(L)RCN]+[ClO4]-, mit Acetonitril bzw. Acrylonitril wurden dargestellt. Als zweizähnige Liganden (LH) dienten Acetylaceton, Benzoylaceton, Dibenzoylmethan, Trifluorothenoylaceton und 8-Hydroxochinolin. Die Komplexe wurden analysiert, ferner durch IR-, 1H- und 31P-NMR-, Leitfähigkeits- und ESCA-Messungen charakterisiert; eine Stereochemie erscheint möglich.
    Notes: Stable cationic complexes of the type [RuCO(PPh3)2(L)(RCN)]+[ClO4]- derived from acetonitrile and acrylonitrile have been synthesized. The bidentate ligands (LH) used are acetylacetone, benzoylacetone, dibenzoylmethane, trifluorothenoyl acetone and 8-hydroxyquinoline. The complexes have been characterized by elemental analysis, IR, conductivity, 1H and 31P NMR and ESCA studies, and possible stereochemistry has been established.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19855270823
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  • 5
    Electronic Resource
    Electronic Resource
    Schiff Base Complexes of Rhodium(I) with Tridentate N-Methyl-S-methyldithiocarbazate Ligands NCL Communication No. 3827. (1986)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 536 (1986), S. 173-178 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Schiffsche Basen-Komplexe des Rhodium(I) mit dreizähnigen N-Methyl-S-methyldithiocarbazat-LigandenSchiffsche Basen aus der Kondensation von β-Diketonen mit N-Methyl-S-methyl-dithiocarbazaten ergeben bei Reaktion mit [Rh(μ-Cl)(CO)2]2 cis-Dicarbonyl-Komplexe Rh(CO)2(Schiff). Die aus aromatischen Aldehyden erhaltenen bilden trans-Dicarbonyl-Komplexe. Mit einem Überschuß von Triphenylphosphin ergeben diese Komplexe nur Rh(CO)(PPh3)(Schiff). Cis-1,5-cyclooctadien (COD) reagiert mit cis-Dicarbonyl-Komplexen zu carbonylfreien Produkten Rh(COD)(Schiff); gleiche Reaktionen wurden bei trans-Dicarbonyl-Komplexen beobachtet. Oxydative Addition von Brom an diese Komplexe ergibt Dibromderivate, in denen die Schiffsche Base als zweizähniger Ligand wirkt, Rh(PPH3)2(Schiff)-Komplexe wurden durch Reaktion oben genannter Schiffscher Basen mit Rh(PPh3)3Cl erhalten. Die Strukturen dieser neuen Komplexe wurden auf Grund von IR-und 1H-NMR-Spektren bestimmt.
    Notes: Schiff bases derived from the condensation of β-diketones with N-methyl-S-methyldithiocarbazates yield cis dicarbonyl complexes Rh(CO)2 (Schiff) on reaction with [Rh(μ-Cl)(CO)2]2. Those derived from aromatic aldehydes form trans dicarbonyl complexes. These complexes with excess of triphenylphosphine give only Rh(CO)(PPh3)(Schiff). cis-1,5-cyclooctadiene (COD) reacts with cis dicarbonyl complexes to yield the carbonyl-free product Rh(COD)(Schiff); similar reactions have not been observed in the case of trans-dicarbonyl complexes. Oxidative addition of bromine to these complexes yields dibromo derivative in which the Schiff base acts as bidentate chelate. Rh(PPh3)2(Schiff) complexes have been obtained from the reaction of above Schiff bases with Rh(PPh3)3Cl. The structures of these new complexes have been determined based on IR and 1H NMR spectra.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19865360520
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