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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 1053-1060 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Optically Active Transition metal Complexes, XXXII: Retention of Configuration in Reactions at the Fe—I and Fe—CH3 Bond of Optically Active ComplexesThe optically pure compounds (-)365-C5H5Fe(CO)(PPh2R*)I ((-)-1 und (-)365-C5H5Fe(CO)PPh2R*)CH3 ((-)-2) with PPh2R* = (S)-(+)365-(C6H5)2PN(CH3)CH(CH3(C6H5) were reacted with Cl2, Br2, I2 and. LiCH3, respectively (reactions a-f, scheme 1,) The reactions occur with predominant retention of configuration at the iron atom. The varying degree of epimerization of the unreacted starting materials and of the isolated reaction products are explained by the pseudorotation of an intermediate with 5 substituents at the iron atom.  -  The optically active complexes (-)365-C5H5Fe(CO)(PPh2R*)Br ((-)-3) und (-)365-C5H5Fe(CO)(PPh2R*)Cl ((-)-4) epimerize in solution according to a 1st order rate law.
    Notes: Die optisch reinen Verbindungen (-)365-C5H5Fe(CO)(PPh2R*)J ((-)-1 und (-)365-C5H5Fe-(CO)PPh2R*)CH3 ((-)-2) mit PPh2R* = (S)-(+)365-(C6H5)2PN(CH3)CH(CH3(C6H5) wurden mit Cl2, Br2, J2 bzw. LiCH3 umgesetzt (Reaktionen a-f, Schema 1). Die Reaktionen verlaufen unter überwiegender Erhaltung der Konfiguration am Eisenatom. Das unterschiedliche Ausmaß der Epimerisierung der nicht umgesetzten Ausgangsmaterialien und der isolierten Reaktions produkte wird auf die Pseudorotation einer Zwischenstufe mit 5 Substituenten am Eisenatom zurückgeführt. - Die optisch aktiven komplexe (-)365-C5H5Fe(CO)(PPh2R*)Br ((-)-3) und (-)365-C5H5Fe(CO)(PPh2R*)Cl ((-)-4) epimerisieren in Lösung nach einem Zeitgesetz 1. Ordnung.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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