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Trimethylphosphine Cobaltates Containing Monoolefin and Dinitrogen Ligands — Model Compounds for Homogeneous Catalysis

  • H.-F. Klein
  • R. Hammer
  • J. Wenninger
  • J. Gross
Part of the The Jerusalem Symposia on Quantum Chemistry and Biochemistry book series (JSQC, volume 12)

Abstract

Properties and reactions of olefincobalt(0) complexes Co(C=C)L3 (L = PMe3; C=C = C2H4, C3H6, cyclopentene) are described. Reduction by potassium affords salts of the cobaltate anion Co(C=C)L3 - which upon protonation yield tbp complexes cis-CoH(C=C)L3. Formal insertion of olefin into the Co-H bond is demonstrated by H/D exchange and by catalytic isomerization of olefins. Complexes cis-CoCH3(C=C)L3 are thermally stable and do not give an analogous insertion reaction. In olefin cobaltates dinitrogen replaces the olefin to give dinitrogen cobaltates L3CoN2M (M = K, 1/2 Mg(THF)4). Electrophiles attack the ambidentate anion of these compounds,\({L_3}C\overline o = \mathop N\limits^ + = \overline N ,\), either at the cobaltate center (oxidative addition type) or at the terminal nitrogen (formation of diazenides L3Co-N=N-R, R = SiMe3, SnMe3).

Keywords

Homogeneous Catalysis Insertion Reaction Terminal Nitrogen Cobaltate Center Hide Exchange 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Company 1979

Authors and Affiliations

  • H.-F. Klein
    • 1
  • R. Hammer
    • 1
  • J. Wenninger
    • 1
  • J. Gross
    • 1
  1. 1.Anorganisch-chemisches Institut TU MünchenGermany

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