The Full Wiki

More info on Diphosphine ligand

Diphosphine ligand: Wikis

Advertisements

Note: Many of our articles have direct quotes from sources you can cite, within the Wikipedia article! This article doesn't yet, but we're working on it! See more info or our list of citable articles.

Encyclopedia

(Redirected to Diphosphines article)

From Wikipedia, the free encyclopedia

Diphosphines are a class of compounds used as ligands in inorganic and organometallic chemistry. They are identified by the presence of two phosphine ligands joined by a backbone, and are usually chelating.

The most widely used diphosphine ligands are the bis(diphenylphosphino)alkanes, Ph2P(CH2)nPPh2. These can be prepared from X(CH2)nX (X=halogen) and YPPh2 (Y=alkali metal) in THF [1]. Bidentate phosphines with only one bridging group such as dppm tend to promote metal-metal interaction or bond formation because the two donor P atoms are so close together. The use of chelate phosphines with many bridging groups giving long flexible chains has quite a different effect. For example, the chelate phosphine Bu2tP(CH2)10PBu 2t can give complexes that have as many as 72 atoms in a ring [2].

Common ligands

Many diphosphine ligands are possible, but some are particularly commonly used and are commercially available. Representative or important diphosphines include:

References

  1. ^ Wilkinson, G.; Gillard, R.; McCleverty, J. Comprehensive Coordination Chemistry: The synthesis, reactions, properties & applications of coordination compounds, vol.2.; Pergamon Press: Oxford, UK, 1987; p. 993. ISBN 0-08-035945-0
  2. ^ Cotton, F.A.; Wilkinson, G. Advanced Inorganic Chemistry: A Comprehensive Text, 4th ed.; Wiley-Interscience Publications: New York, NY, 1980; p.246. ISBN 0-471-02775-8

Advertisements






Got something to say? Make a comment.
Your name
Your email address
Message