Cationic Rh-phosphenium complexes for bifunctional catalysis

INOR 326

Richard J. Keaton, rkeaton@lanl.gov1, Jeffrey L. Cross, jlcross@lanl.gov1, and R. T. Baker, weg@lanl.gov2. (1) Chemistry Division, Los Alamos National Laboratory, MS J514, Los Alamos National Laboratory, Los Alamos, NM 87545, (2) Chemical Science and Technology Division, Los Alamos National Laboratory, MS J514, Los Alamos, NM 87545
In enzyme catalysis, proteins employ various functional groups to maneuver the substrate into an optimal orientation before its specific reaction can go forward, often regio- and stereospecifically. Gaining this level of control in bench top catalysis has given many a chemist nightmares, but has also made many careers. Toward this end, we have utilized late transition metal complexes containing a cationic diaminophosphenium ligand, which has a vacant p orbital on the phosphorus atom. This Lewis acid moiety next to the metal draws lone-pairs of electrons on heteroatom containing substrates (i.e., N, O), thus manipulating the monomers configuration at the metal. The acidity of P depends greatly on the transition metal and the ancillary ligands on the metal, as well as the strength of the non-coordinating anion. The C-H bond activation of heteroatom containing allylic species will also be addressed.
 

Organometallic: Catalysis
7:00 PM-10:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Sci-Mix

Division of Inorganic Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006