Bis N-heterocyclic carbene complexes of palladium and platinum. Synthesis, structure and catalytic activity in the CH activation of methane

INOR 123

Sebastian Ahrens, sebastian.ahrens@chemie.tu-dresden.de, Physical Organic Chemistry, University of Technology Dresden, Mommsenstrasse 13, Dresden, 01062, Germany and Thomas Strassner, thomas.strassner@chemie.tu-dresden.de, Physical Organic Chemistry, TU Dresden, Mommsenstrasse 13, Dresden, 01062, Germany.
Novel transition metal complexes of N–heterocyclic carbenes were introduced in the last decade in many fields of chemistry. Metal complexes of imidazoline-2-ylidenes have recently been shown to be extremely versatile and stable catalysts for a wide range of reactions including C-C coupling reactions, olefin metathesis, hydroformylation and most recently CH-activation. Chelated biscarbene complexes may be one way to obtain more stable catalysts capable of tolerating harsher reaction conditions in homogenous catalysis. A series of bis-NHC chelate ligands and their palladium and platinum complexes have been prepared. The influence of the NHC ligands with different aliphatic and aromatic bridges and substituents at the imidazole ring on the solid state structure and reactivity of the complexes has been studied. The catalytic activity of the metal complexes was successfully tested the catalytic CH activation of methane.

 

Organometallic Synthesis
1:30 PM-5:20 PM, Sunday, August 19, 2007 BCEC -- 212, Oral

Division of Inorganic Chemistry

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