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d- and f-Block Transition Metal Complexes with Bulky Allyl Ligands

  1. Stephen C. Chmely,
  2. Timothy P. Hanusa

Published Online: 15 DEC 2010

DOI: 10.1002/0470862106.ia299.pub2

Encyclopedia of Inorganic Chemistry

Encyclopedia of Inorganic Chemistry

How to Cite

Chmely, S. C. and Hanusa, T. P. 2010. d- and f-Block Transition Metal Complexes with Bulky Allyl Ligands. Encyclopedia of Inorganic Chemistry. .

Author Information

  1. Vanderbilt University, Nashville, TN, USA

Publication History

  1. Published Online: 15 DEC 2010


The allyl anion (C3H5) is often found in combination with other ligands in organometallic complexes. Its compact size, however, means that compounds in which it is the only or principal type of ligand are frequently coordinatively unsaturated and prone to decomposition. Sterically bulky substituents (e.g.,—SiMe3) placed on the allyl group will increase its effective size, often enhancing the thermal, and in some cases oxidative, stability of the associated metal complexes. Compounds of the d- and f-block metals containing bulky allyl ligands display a wide range of monomeric, oligomeric, and polymeric structures. Some of these complexes have no counterparts with unsubstituted allyls, and others are active polymerization catalysts. Research in this area has markedly expanded the range of metals, structural types, and associated reactions that can be incorporated into metal–allyl chemistry.


  • allyl complex;
  • steric bulk;
  • solid-state structures;
  • transition metal