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  • Articles: DFG German National Licenses  (2)
  • Matrix isolation  (1)
  • [4 + 2] Cycloadditions  (1)
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  • Articles: DFG German National Licenses  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Abfangen von Hexafluorselenoaceton durch Cycloadditionen mit Dienen sowie Darstellung von Hg[SeCF(CF3)2]2 und (CH3)3SiSeCF(CF3)2 (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 423-426 
    Details
    ISSN: 0009-2940
    Keywords: Bis(perfluoroisopropylseleno)mercury ; Silane, (perfluoroisopropylseleno)trimethyl ; Selenoketone, bis(trifluoromethyl) ; [4 + 2] Cycloadditions ; Retro Diels-Alder reaction ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Scavenging of Hexafluoroselenoacetone by Cycloadditions with Dienes and Preparation of Hg[SeCF(CF3)2]2 and (CH3)3SiSeCF(CF3)2Bis(perfluoroisopropylseleno)mercury (2) was obtained from 2,2,4,4-tetrakis(trifluoromethyl)-1,3-diselenetane (1) and HgF2 in DMF, and (perfluoroisopropylseleno)trimethylsilane (3) from 2 and (CH3)3Sil. The reaction of 2 with (C2H5)2All as well as the pyrolysis of 1 yield a deep purple liquid in very small amounts, not sufficient for further characterisation, which is assumed to be hexafluoroselenoacetone (4). However, 4 is formed as an intermediate in the reaction of hexafluoropropene with CsF and selenium and can be trapped by isoprene or anthracene to form 5a, 5b, and 6, respectively. In boiling benzene a transformation of (CF3)2C=Se from 6 to 2,3-dimethyl-1,3-butadiene is accomplished yielding 7 in a retro Diels-Alder cleavage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240303
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Oxygen Transfer from Chromyl Chloride to Alkynes and Allene - IR-Spectroscopic Identification of η1-Ketene and Cyclopropanone Complexes of O=CrCl2 (1999)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 1335-1342 
    Details
    ISSN: 1434-1948
    Keywords: Photolysis ; Alkynes ; Matrix isolation ; DFT ; Oxygenations ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Photolytically-induced reactions of chromyl chloride with acetylene and but-2-yne (dimethylacetylene) in low-temperature argon matrices yield end-on ketene and dimethylketene complexes of O=CrCl2, respectively. The product formation probably results from an electrophilic attack of a Cr=O linkage on the C≡C triple bonds, leading to radical-like transition states or intermediates, which subsequently rearrange through 1,2-H or 1,2-methyl shifts. Consequently, allene is attacked at its central carbon and the allyl radical thus generated undergoes subsequent ring-closure to give a cyclopropanone complex of O=CrCl2.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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