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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 1851-1856 
    ISSN: 0009-2940
    Keywords: Grignard reagents, 1,3-di- ; Titanocene ; Zirconocene ; Platinum, complexes of ; Rhodium, complexes of ; Iridium, complexes of ; Metallacycles ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Five 1,8-naphthalenediyl transition metal compounds 2 were prepared by treating either 1,8-naphthalenediylmagnesium (1) or 1,8-dilithionaphthalene with the appropriate transition metal dichloride LnMCl2: LnM = Cp2Ti (2a), (PEt3)2Pt (2b), Cp* PPh3Rh (2c), Cp* PPh3Ir (2d), or Cp*2Zr (2e). The resulting metallacycles were characterized by NMR and mass spectrometry. X-ray crystal structure analyses were performed for (1,8-naphthalenediyl)titanocene (2a) and (1,8-naphthalenediyl)bis(triethylphosphane)platinum (2b). Despite the strain induced by the four-membered metal-containing rings, the naphthalene units show remarkably small distortions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 26 (1987), S. 990-1005 
    ISSN: 0570-0833
    Keywords: Di-Grignard compounds ; Metallacycles ; Grignard reactions ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Just as the by now famous Grignard reaction can be used to prepare organomagnesium halides from organic monohalides, organic dihalides can be used under certain conditions to prepare di-Grignard compounds. Difficulties are encountered in particular when the two halide functionalities are separated by only a short carbon chain (i. e. by 1-3 carbon atoms): in such cases side reactions predominate. It has however recently become possible to obtain such “short” di-Grignard compounds on a preparatively useful scale. This opens up new perspectives for the synthesis of metallacyclic compounds of other main group and transition metal elements and in particular for metallacyclobutanes. The preparation, structure and application of a selected number of di-Grignard reagents will be treated in the present review.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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