ИСТИНА |
Войти в систему Регистрация |
|
ИСТИНА ЦЭМИ РАН |
||
N-heterocyclic carbenes (NHCs) became widely used as powerful ligands for stabilization of reactive species, as organocatalysts, and as spectator ligands in transition metal catalysis. Most of NHC-metal complexes known to date are derived from imidazolylidene 1 and imidazolinyliden 2 type carbenes. Our group develops chemistry of six- (3) and seven-membered (4) ring carbenes. Carbenes 3 and 4 exhibit superior stereoelectronic properties in comparison with 1 and 2. Expansion of the ring leads to significant increase in donor strength and sterical stabilization. In this contribution we report our recent results on theoretical calculations of electronic structure and ligand properties of 3 and 4; efficient methods of synthesis of imidazolium salts and generation of free carbenes; synthesis of late transition metal (Cu, Ag, Au, Pd) complexes, and their utilization in stoichiometric and catalytic reactions.