Abstract
Development of well-defined multivalent systems with densely packed multiple functional groups located within a single molecular structure provides an excellent opportunity to generate catalysts of enhanced activity. A series of mono-, di- and trinuclear Pd(II) complexes based on polyketonate ligands allied with 2,2′-bipyridine has been designed, synthesized and fully characterized in both solution and solid state. The mono-, di- and tritopic β-diketonate molecules serve as scaffolds for Pd(II) active sites which, in the two latter cases, are forced into close proximity. Application of the complexes as catalysts in Suzuki-Miyaura cross-coupling as a model reaction has revealed significant differences in reaction yields and a trend in reactivity reflecting their nuclearity.
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