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  • 1
    Electronic Resource
    Electronic Resource
    Isotropic submanifolds with pointwise planar normal sections (1986)
    Springer
    Journal of geometry 26 (1986), S. 99-104 
    Details
    ISSN: 1420-8997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Submanifolds of Em with pointwise planar normal sections were studied in [1] and others. In the present paper, we will prove that an isotropic submanifold in Em with pointwise planar normal sections is isometric to a symmetric space of rank one or to a Euclidean space. Moreover we will determine such surfaces in Em with the above assumptions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01227835
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Study of Calixarenes, V. Friedel-Crafts Reaction of Calixarenes (1994)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 519-523 
    Details
    ISSN: 0009-2940
    Keywords: Calixarenes ; Friedel-Crafts reaction ; selective ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The para-acylation of calix[4]arene (2), calix[6]arene (3), and calix[8]arene (4) by Friedel-Crafts reaction with a wide variety of acyl chlorides leads to 5-7 in moderate to good yields. Friedel-Crafts reaction of 26,28-dimethoxycalix[4]arene (8) gave products 9 selectively disubstituted in the para-positions of phenol rings.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19941270310
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    Paper (German National Licenses)
    Fulltext
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