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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International journal of earth sciences 82 (1993), S. 556-565 
    ISSN: 1437-3262
    Keywords: Kinematics ; Crustal stacking ; Crustal extension ; Bohemian Massif
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The south-eastern Bohemian Massif consolidated during the Late Variscan orogeny by the oblique collision of two continental crustal blocks after closure of an oceanic realm. One microcontinent comprises portions which are now distributed among Moravian and Moldanubian units and which are characterized by Late Proterozoic tectonothermal events, especially by granitoid intrusions. The other microcontinent includes the Gföhl gneiss and granulites (Gföhl nappe) of probable Early Palaeozoic protolith ages. Both continental blocks are separated by an ophiolite-like assemblage, which is preserved in portions of the Raabs unit. Oblique crustal stacking is accompanied by north-eastward propagation of nappes in a dextral transpressive regime. Exhumation of previously thickened crust is achieved by equally oriented bulk extension but partitioned in distinct displacement paths. Coeval stacking and extension at different crustal levels is suggested.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 56-62 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Substituent Dependence in the Synthesis of 2-Oxazolidones from PhenyloxiranesOn heating with urea, the phenyloxiranes 1c-k yield the mostly new 5-phenyl-2-oxazolidones 2c-h and 2k and the 4-phenyl-2-oxazolidones3d-k. The yields can be increased by performing the reaction of 1c-e with urea in DMF. In general, an electron-withdrawing substituent in the o-or p-position favors formation of 2, while electron-repelling substituents promote formation of 3.
    Notes: Die Phenyloxirane 1c—k ergeben beim Erhitzen mit Harnstoff die größtenteils neuen 5-Phenyl-2-oxazolidone 2c-h und k sowie die 4-Phenyl-2-oxazolidone 3d-k. Führt man die Reaktion von 1c-e mit Harnstoff in DMF durch, erhöhen sich die Ausbeuten. Allgemein begünstigt Elektronenzug o- oder p-ständiger Substituenten das Entstehen von 2, Elektronenschub dagegen die Bildung von 3.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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