444 - FerroLANE and FerroTANE ligands: Reactivity and electochemistry of chiral 1,1'-bis(phosphino)ferrocene ligands
Chelsea L. Mandell1, mandellc@lafayette.edu, Chip Nataro1, W. Scott Kassel2, William G. Dougherty2, Shannon S Kleinbach1. (1) Department of Chemistry, Lafayette College, Easton, PA 18042, United States, (2) Department of Chemistry, Villanova University, Villanova, PA 19085, United States
There are a
variety bidentate phosphines with ferrocene backbones but the
1,1'-bis(phosphino)ferrocenes are the most common. These phosphines are used
as ligands in catalytic applications. Chirality can be incorporated into
the phosphine which makes the ligands suitable for asymmetric catalysis. One class contains phosphorus heterocycles with
chiral centers next to phosphorus. In the FerroLANE ligands the
phosphorus is part of a 5-membered ring while in the FerroTANE ligands the phosphorus
is part of a 4-membered ring. The electrochemistry of these ligands was
examined and the groups on the chiral centers impact the oxidation reversibility.
Several new compounds were prepared. Upon coordination to Pd or Pt, the
oxidation is shifted positive and is reversible. The phosphine sulfides
and selenides were prepared by reaction with the desired element. Oxidation
of the sulfide is straightforward. Oxidation
of the selenide required further investigation. X-ray structures of
several of the compounds will be presented.
Sunday, March 21, 2010 07:00 PM
Organometallic Chemistry: Synthesis and Characterization (07:00 PM - 09:00 PM)
Location: The Moscone Center
Room: Hall D
Monday, March 22, 2010 08:00 PM
Sci-Mix (08:00 PM - 10:00 PM)
Location: The Moscone Center
Room: Hall D
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