Kläui ligand explained

The Kläui ligand is the anion −. The ligand, popularized by Wolfgang Kläui, binds metals and metalloids via a facial O3 donor set.[1] Related tridentate and tripodal anionic ligands include trispyrazolylborates.

thumb|160px|right|General structure of a metal center coordinated to a κ3-Kläui ligand.

The ligand is derived from the cationic complex of trimethylphosphite 2+ via an Arbuzov reaction.[2] Using other phosphites and other cyclopentadienyl ligands, a large variety of derivatives are possible. The parent acid H is highly soluble in water (270 g/100 mL). Its pKa is about 2. Many complexes have been described, including bis(chelate) complexes of the type

Notes and References

  1. Wolfgang Kläui, N. Mocigemba, A. Weber-Schuster, R. Bell, W. Frank, D. Mootz, W. Poll, and H. Wunderlich "[(C<sub>5</sub>H<sub>5</sub>)Co{P(O)(OH)<sub>2</sub>}<sub>3</sub>H]: A Novel Organometallic Tris-phosphonic Acid that Dissolves Glass to Form a Six-Coordinate Silicon Complex" Chemistry – European Journal 2002, Volume 8, pages 2335–2340.
  2. W. Kläui, P. C. Kunz "Sodium (η5-Cyclopentadienyl)tris(dimethylphosphito-P)cobalt(III),Na[(C<sub>5</sub>H<sub>5</sub>)Co{P(O)(OMe)<sub>2</sub>}<sub>3</sub>]" Inorg. Synth., 2010 vol. 35, pp. 125–128.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Kläui ligand".

Except where otherwise indicated, Everything.Explained.Today is © Copyright 2009-2024, A B Cryer, All Rights Reserved. Cookie policy.