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Lanthanide Amides

  1. Simon A. Cotton

Published Online: 14 MAR 2014

DOI: 10.1002/9781119951438.eibc2026

Encyclopedia of Inorganic and Bioinorganic Chemistry

Encyclopedia of Inorganic and Bioinorganic Chemistry

How to Cite

Cotton, S. A. 2014. Lanthanide Amides. Encyclopedia of Inorganic and Bioinorganic Chemistry. 1–11.

Author Information

  1. University of Birmingham, Birmingham, UK

Publication History

  1. Published Online: 14 MAR 2014


Lanthanides form a wide (and increasing) variety of alkyl- and arylamides. Most are in the (+3) oxidation state, but simple alkylamides of Sm(II), Eu(II), Yb(II), and Ce(IV) are known. The largest and best characterized group are three coordinate tris(bis(trimethylsilyl)amide) compounds, [Ln(N(SiMe3)2)3], which have unusual pyramidal structures in the solid state. These compounds find application in organic and organometallic syntheses, and form adducts with many Lewis bases, both four and five coordinates. Mono and bis trimethylsilyl)amide derivatives are also known. Other tris(amide) compounds with other amide groups have also been synthesized; these compounds with low coordination numbers form a fertile area for the study of agostic interactions. A recent interesting development has been the interaction of certain amides with small molecules under reducing conditions, notably in the isolation of dinitrogen complexes.


  • lanthanide;
  • amide;
  • bis(trimethylsilyl)amide;
  • low coordination number;
  • three coordinate