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  • Articles: DFG German National Licenses  (4)
  • Electronic Resource  (4)
  • Bicyclo[3.2.0]hepta-1,3-dienyl complexes  (2)
  • 1,3-Indandione  (1)
  • Acepentalene  (1)
Source
  • Articles: DFG German National Licenses  (4)
Material
  • Electronic Resource  (4)
Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    (Bicyclo[3.2.0]hepta-1,3-dienyl)cobalt(I) Complexes (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 713-724 
    Details
    ISSN: 0009-2940
    Keywords: Bicyclo[3.2.0]hepta-1,3-dienyl complexes ; Calculations, semiempirical ; Alkyne trimerization ; Cobalt complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Three isomeric bicyclo[3.2.0]heptadienes 1 - 3 are compared by semiempirical calculations. Experimental attempts directed to the synthesis of derivatives of 1 are described. The synthesis, properties and some reactions of (η51-bicyclo[3.2.0]hepta-1,3-dienyl)(η41-cycloocta-1,5-diene)cobalt(I) (22), including an X-ray crystal structure determination of the reaction product with diphenylethyne, the tetraphenylcyclobutadiene complex 30, are presented.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260323
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ring Opening of (η5-Bicyclo[3.2.0]hepta-1,3-dienyl)-(η4-tetraphenylcyclobutadiene)cobalt(I) Followed by Cycloaddition (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1651-1656 
    Details
    ISSN: 0009-2940
    Keywords: Bicyclo[3.2.0]hepta-1,3-dienyl complexes ; Ring slippage ; Cycloadditions ; Cobalt complexes ; DSC ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The title reaction, which was detected by a comparison of the DSC analysis of title compound 2 with that of the corresponding bicyclo[3.3.0]octa-1,3-dienyl complex 3, takes place at 200°C with various dienophiles (dimethyl fumarate, dimethyl maleate, diphenylethyne, N-methylmaleinimide). 3,4-Dimethylenecyclopentenyl complex 12 most likely is the key intermediate of the reaction.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260724
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    η4-Complexes of 4,7-Dihydroacepentalene: Facile Degenerate Haptotropic Rearrangement of (η5-Cyclopentadienyl)(η4-4,7-dihydroacepentalene)cobalt(I) in Contrast to its Tricarbonyliron Counterpart (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 2423-2427 
    Details
    ISSN: 0009-2940
    Keywords: Acepentalene ; 4,7-dihydro ; complexes ; Degenerate haptotropic rearrangement ; Cobalt complexes ; Iron complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The (cyclopentadienyl)cobalt(I) complex 4 of the 4,7-dihydroacepentaleneThe numbering of the ring system corresponds to the tricyclo-decatetraene nomenclature used in the Exp. Part. Thus, 4,7-substitution would be 2a,4a-substitution in acepentalene numbering. derivative 2b has been prepared by the reaction of the ligand with (cyclopentadienyl)bis(ethene)cobalt(I). NOE experiments indicate a complexation at the convex face of the polyolefinic ligand. 1H-NMR spectra establish a degenerate haptotropic rearrangement with CpCo migration from one diene unit to the adjacent one. The activation energy of this process is estimated to be 15 kcal/mol. An X-ray crystal structure determination of (η4-4,7-dihydroacepentalene)tricarbonyliron derivative 3a shows a distorted coordination of Fe(CO)3 at the convex face of the ligand, too.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911241108
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis, Characterization, and Some Reactions of the Tricarbonylchromium Complexes of 1,3-Indandione and Ninhydrin (1999)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 167-179 
    Details
    ISSN: 1434-193X
    Keywords: 1,3-Indandione ; Ninhydrin ; Chromium complexes ; Acetals ; Oxidation ; Hetero Diels-Alder reaction ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: -The syntheses and characterization of the tricarbonylchromium complexes of 1,3-indandione and ninhydrin are described. As the direct complexation proved unsuccessful, the acetal route was tried. Although some complexes were obtained, complex deacetalization did not work in the case of ninhydrin. Finally, the oxidation of tricarbonyl(η6-1,3-indandione)chromium(0) with dimethyldioxirane gave the ninhydrin complex in 75% yield in equilibrium with the indantrione complex. The latter reacts in hetero Diels-Alder reactions with dienes with diastereoselective formation of spiro anellated pyran derivatives.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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