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  • 1
    Electronic Resource
    Electronic Resource
    On the separation of lithium isotopes by the method of molecular distillation of liquid lithium (1962)
    Springer
    Atomic energy 11 (1962), S. 1079-1083 
    Details
    ISSN: 1573-8205
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Notes: Abstract This study determines the value of the separation factor of lithium isotopes in the evaporation of liquid metallic lithium in a single-stage still. At a temperature of 500 °C the value of the separation factor is 1.08 ± 0.02. We carried out studies of the separation of lithium isotopes by the method of molecular distillation in an 8 -stage cascade-type metal still. It was shown that when the cells of the still are filled with metallic packing and the condensation temperature of the lithium is raised to 350 °C, the efficiency of one stage of the still is 0.4–0.5.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01490492
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  • 2
    Electronic Resource
    Electronic Resource
    Mass spectra of certain spiro compounds with a central atom of an element of group IVB (1973)
    Springer
    Russian chemical bulletin 22 (1973), S. 1934-1938 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions The mass spectra of 4-silaspiro[3, 3]heptane, 4-silaspiro[3,4]octane, 4-silaspiro[3,5]nonane, as well as spiro[2,3]hexane and spiro[2,4]heptane, were obtained and compared with the known spectra of 4-germaspiro[3,4]octane, 5-stanna- and 5-plumbaspiro[4,4]nonanes, and spiroalkanes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00929379
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  • 3
    Electronic Resource
    Electronic Resource
    Mass spectra of methylphenylspirosiloxanes (1974)
    Springer
    Russian chemical bulletin 23 (1974), S. 300-302 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The mass spectra of octamethylspiro-(5,5)-pentasiloxane, cis- and trans-tetramethyltetraphenylspiro-(5,5)-pentasiloxanes, and cis-dimethylhexaphenylspiro-(5,5)-pentasiloxane were investigated. 2. The decomposition of these compounds is typical on the whole of organocyclosiloxanes; however, the bicyclic siloxane skeleton is more stable to dissociation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00924673
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  • 4
    Electronic Resource
    Electronic Resource
    Electron-impact fragmentation of cyclocarbosiloxanes (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 4 (1970), S. 195-201 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The fragmentation of six and eight membered methyl substituted cyclocarbosiloxanes of general formula (CH3)6Si3O3 — n(CH2)n (n = 1 or 2) and (CH3)8 Si4O4-n(CH2)n (n = 1, 2 or 3) under electron-impact (70 eV) is reported. The behaviour of these compounds under electron-impact is intermediate between that of the corresponding cyclosiloxanes and cyclocarbosilanes. In every case the most intense singly and doubly charged ions correspond to the loss of one and two methyl groups respectively. In going from the cyclosiloxanes to the cyclocarbosilanes the intensity of the primary ions is reduced and the intensity of those fragment ions whose formation involves the rearrangement or breakdown of the cyclic framework of the molecule is increased. These ions are the [M —CH3—(CH3)4Si]+ ions in the eight membered and the [(CH3)3Si]+ ions in both cases. The data on doubly charged and metastable ions in the mass spectra of the cyclocarbosiloxanes are presented and discussed.The fragmentation of six and eight membered methyl substituted cyclocarbosiloxanes of general formula (CH3)6Si3O3 — n(CH2)n (n = 1 or 2) and (CH3)8 Si4O4-n(CH2)n (n = 1, 2 or 3) under electron-impact (70 eV) is reported. The behaviour of these compounds under electron-impact is intermediate between that of the corresponding cyclosiloxanes and cyclocarbosilanes. In every case the most intense singly and doubly charged ions correspond to the loss of one and two methyl groups respectively. In going from the cyclosiloxanes to the cyclocarbosilanes the intensity of the primary ions is reduced and the intensity of those fragment ions whose formation involves the rearrangement or breakdown of the cyclic framework of the molecule is increased. These ions are the [M — CH3—(CH3)4Si]+ ions in the eight membered and the [(CH3)3Si]+ ions in both cases. The data on doubly charged and metastable ions in the mass spectra of the cyclocarbosiloxanes are presented and discussed.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210040121
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