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  • 1990-1994  (3)
  • Inorganic Chemistry  (3)
  • Grignard reagents, 1,3-di-  (1)
  • Group 14 compunds
  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and Reactions of P-Supermesityl-C-halophosphaalkenes (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 2677-2684 
    Details
    ISSN: 0009-2940
    Keywords: Phosphaalkenes, C-halo, C-metal ; “Phospha-isonitrile” ; Phosphinylidenemethylene ; Phosphaalkyne, E/Z isomers ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: C-Halophosphaalkenes (1, 2) were prepared in high yield by a one-pot synthesis from HCX3 or CI4 and Mes* PCl2 (Mes* = supermesityl = 2,4,6-tri-tert-butylphenyl). The C-iodophosphaalkenes Mes* P = Cl2 (1 C) and Mes*P = CHI (2c) undergo halogen-metal exchange with n-BuLi at low temperatures. The resulting carbenoids Mes*P = CILi (11 c) and Mes*P = CHLi (6) reacted with ClMMe3 (M = Si, Ge, Sn) to give Mes*P=CIMMe3 [(Z)-13: M = Ge; (Z)-14: M = Sn] or Mes*P = CHMMe3 (8-10), respectively. Further reaction of (Z)-13 and (Z)-14 with nBuLi and ClMMe3 gave Mes*P=C(MMe3 (18: M=Ge; 19: M = Sn). The carbenoid (Z)-11 c decomposed at -85°C; instead of the expected “phosphaisonitrile” Mes*P = C : (21), only Mes*C≡P (15) was obtained which lends experimental support to the theoretically predicted instability of 21.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911241207
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Four-Membered 1,8-Naphthalenediyl Transition Metallacycles (1994)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 1851-1856 
    Details
    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
    URL: http://dx.doi.org/10.1002/cber.19941271006
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Neutralization-Reionization Mass Spectrometry and Matrix Isolation of Some 9-Silaanthracenes (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 185-190 
    Details
    ISSN: 0009-2940
    Keywords: 9-Silaanthracene, derivatives ; Ms, neutralization-reionization ; Matrix isolation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Neutralization-reionization mass spectrometry of silaanthracene radical cations, which are generated from the 9,10-dihydro-9-silaanthracenes 1, 3, 8 and 11 under electron-impact conditions, indicates that silaanthracenes are stable molecues in the gas phase. Flash pyrolysis of the starting compounds mentioned above also yields the silaanthracenes 2, 4, and 10, which may be isolated in an argon matrix at 15 K and exhibit characteristic UV spectra.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240127
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    Paper (German National Licenses)
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