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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 657-672 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Carbene Complexes, LXVIII. Synthesis of cis- and trans-Tetracarbonyl(carbene)(phosphine) Complexes of Chromium(0) and Tungsten(0)Thermal reaction in the range 60 to 80°C and photochemical reaction at room temperature of tertiary phosphines PX3 [X3=(CH3)3, (C2H5)3, (n-C8H17)3, (i-c3H7)3, (C6H11)3, (C2H5)2C6H5, (C6H5)2 C2H5, (C6H5)3, (p-C6H4CH3)3, (p-C6H4F)3, (m-C6H4F)3] with pentacarbony(carbene) complexes of chromium (0) and tungsten (0), (CO)5Cr[C(R′)R″] and (CO)4M(PR3)[C(R′)R″] and trans-(CO)4M(PR3)[C(R′)R″]. Photochemical reaction at low temperatures and in the case where R′==NH2 and NHCH3, yields only the cis-isomers. The structures of the yellow to red, diamagnetic compounds were established by analyses and spectra.
    Notes: Bei der thermischen Umsetzung von tertiären Phosphinen PX3 [X3=(CH3)3, (C2H5)3, (n-C4H9)3, (n-C8H17)3, (C3H7)3, (C6H11)2C6H5, (C6H5)2C2H5)3, (p-C6H4CH3)3- (p-C6H4F)3, (m-C 6H4F)3] mit Pentacarbonyl(carben)-Komplexen von Chrom (0) und Wolfram(0), (CO)5Cr[(R′)R″] und (CO)5W[ C(R′)R″] (R′=OCH3, OC2H5; R″==CH3, C2H5, i-C3H7, C6H5), erhält man im Temperaturbereich zwischen 60 und 80°C unter CO-Abspaltung sowohl die cis-als auch die trans-Isomeren der Tetracarbonyl(carben)-(phosphin)-Komplexe (CO)4M(PR3)[C(R′)R″]. desgleichen bei photochemischer Reaktion bei Raumtemperatur. Bei photochemischer Umsetzung bei tiefen Temperaturen und für R′=NH2 oder NHCH3 fallen jedoch nur die cis-Verbindungen an. Die Konstitutionen der gelben bis roten, diamagnetischen Verbindungen wurden analytisch und spektroskopisch gesichert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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