George G. Stanley

Biography

Dr. George Stanley is currently working as a Alumni Professor in the Department of Department of Chemistry, Louisiana State University , USA. His research interests includes Bonding models: Discrete molecules, Chemical literature, Descriptive chemistry, Group theory & applications, Molecular structure, Nomenclature, Physical methods / analytical techniques, Reaction mechanisms, Synthesis and reactivity, Thermodynamics. He is serving as an editorial member and reviewer of several international reputed journals. Dr. George Stanley is the member of many international affiliations. He has successfully completed his Administrative responsibilities. He has authored of many research articles/books related to Bonding models: Discrete molecules, Chemical literature, Descriptive chemistry, Group theory & applications, Molecular structure, Nomenclature, Physical methods / analytical techniques, Reaction mechanisms, Synthesis and reactivity, Thermodynamics.

Research Interest

We have designed and synthesized a new class of binucleating polydentate phosphine ligands for preparing novel bimetallic transition metal complexes. Considerable interest has been shown in showing that multiple metal centers can exhibit cooperative behavior in catalytic reactions and show superior activities and selectivities relative to monometallic complexes. This goal has been dramatically achieved through the design and synthesis of a new binucleating tetraphosphine ligand that can bridge and chelate two metal centers. This ligand, called et,ph-P4, exists in the two diastereomeric forms shown to the left. [Rh2(nbd)2(et,ph-P4)]2+ (nbd = norbornadiene) is a precursor for a remarkable bimetallic hydroformylation catalyst. Hydroformylation is the largest homogeneous industrial catalytic process for converting alkenes, H2 and CO, into aldehyde products. Our bimetallic catalyst has higher activity and selectivity for linear aldehyde products compared to current commercial Rh/PPh3 catalysts. The activity and selectivity of our bimetallic catalyst is extremely unusual because electron-rich chelating phosphines like et,ph-P4 are well known to generally deactivate rhodium toward hydroformylation and lower the selectivity to linear aldehyde. We have demonstrated (Science, 1993) that this catalyst represents one of the most dramatic examples of bimetallic cooperativity in homogeneous catalysis.