Catalytic applications of wide bite angle diphosphine complexes

INOR 747

Brad P. Morgan, bradm@clemson.edu1, Robert J. Gilliard, rgillia@clemson.edu1, and Rhett C. Smith, rhett@clemson.edu2. (1) Department of Chemistry, Clemson University, 479 Hunter Labs, Clemson, SC 29634, (2) Department of Chemistry, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 479 Hunter Labs, Clemson, SC 29634
The facile preparation of a diverse series of bis-phosphorous donor ligands (diphosphines, bis(phosphonites), and diphosphinites) built upon m- and p-terphenyl scaffolds is reported. Calculations and X-ray structural studies indicate that these ligands support metal complexes with large (>120 deg.) P–M–P angles (bite angles; M = Ru, Rh, Ir, Pd, or Pt). Such wide bite angle ligands (i.e., the Xantphos family) can support exceptionally active catalysts for a variety of industrially-important reactions. Metal complexes of new ligands were thus fully characterized and catalytic reactions (Heck, Sonogashira, Suzuki, and Kumada coupling, hydroformylation, and addition of organometallics to alkenes) utilizing new wide bite angle ligands were explored to gauge the effect of bite angle, ligand rigidity, and phosphine basicity on catalyst activity and regioselectivity.
 

General Organometallic Chemistry
7:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Sci-Mix

Division of Inorganic Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007