Selectivity Effects in Bimetallic Catalysis

An emerging area of homogeneous catalysis is the use of catalysts featuring two closely associated metal sites. This approach complements the traditional focus on single‐site catalysts and makes available new parameters with which to optimize catalytic behavior. Single‐site catalysts are optimized t...

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Bibliographic Details
Published in:Chemistry : a European journal 2016-04, Vol.22 (17), p.5822-5829
Main Author: Mankad, Neal P.
Format: Article
Language:English
Subjects:
Bimetals
Case studies
Catalysis
Catalysts
Chemistry
Compatibility
cooperative effects
Electronic properties
heterometallic complexes
homogeneous catalysis
Ligands
metal-metal interactions
Metals
Optimization
organometallic chemistry
Selectivity
Stereoselectivity
Transformations
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Summary:An emerging area of homogeneous catalysis is the use of catalysts featuring two closely associated metal sites. This approach complements the traditional focus on single‐site catalysts and makes available new parameters with which to optimize catalytic behavior. Single‐site catalysts are optimized through changing 1) the identity of the metal, and 2) the steric and electronic properties of the ligands. Bimetallic catalysts introduce new optimization parameters such as 3) catalyst nuclearity (mononuclear vs. binuclear), and 4) bimetallic pairing (relative compatibility of two metal sites). In order to harness these new optimization parameters in developing systems, it is necessary to first understand the origin of bimetallic selectivity effects that already have been documented. This Concept article highlights bimetallic effects on the chemo‐, regio‐, and stereoselectivity of catalytic transformations, using selected case studies from the recent literature as illustrative examples. It takes two! The effects of catalyst nuclearity on catalytic chemo‐, regio‐, and stereoselectivity are explored through examination of recent case studies. Collectively, these studies show that catalyst nuclearity is complementary to ligand design as a potential optimization parameter in homogeneous catalysis.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201505002