Elsevier

Polyhedron

Volume 12, Issue 22, November 1993, Pages 2671-2680
Polyhedron

Organochromium π-complexes—VIII. Reactions of the (η5-Me5C5)Cr-system with 1,3-dienes and alkynes

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Abstract

Cp*(η4-1,3-diene)Cr compounds have been prepared either by reacting Cp*(η3-C3H5)2Cr with a diene or by reducing Cp*Cr(THF)Cl2 with activated-Mg in the presence of the diene. These coordinatively and electronically unsaturated species readily form adducts with CO or P-donor ligands. The reaction of Cp*(η4-1,3-C4H6)Cr with further butadiene leads to the formation of Cp*(η33-octadienediyl)Cr which in turn reacts with a disubstituted alkyne (RC2R) with addition to the 2,7-positions of the octadienediyl chain to give Cp*(η121-R2C10H12)Cr species. The crystal structures of representative compounds have been established by X-ray diffraction.

References (21)

  • P. Betz et al.

    Polyhedron

    (1993)
  • K. Angermund et al.

    Polyhedron

    (1993)
  • S.P. Nolan et al.

    J. Organomet. Chem.

    (1985)
  • R. Benn et al.

    J. Organomet. Chem.

    (1985)
  • D.R. Russell et al.

    J. Chem. Soc., Dalton Trans.

    (1976)
  • R.S. Threlkel et al.

    J. Organomet. Chem.

    (1977)
  • K. Fujita et al.

    J. Organomet. Chem.

    (1976)
  • K. Angermund et al.

    Organometallics

    (1986)
  • J.L. Robbins et al.

    J. Am. Chem. Soc.

    (1982)
  • D.C. Calabro et al.

    J. Am. Chem. Soc.

    (1981)
There are more references available in the full text version of this article.

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For parts VI and VII see refs. 1 and 2.

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