First chelated chiral N-heterocyclic bis-carbene complexes
[formula: see text] First chiral bidentate bis-carbene complex of Pd(II) prepared from a bis-imidazolium salt derived from (S)-2,2'-bromomethyl-1,1'-binaphthyl exists in both cis- and trans-square planar geometry. These and the corresponding trans-Ni(II) complexes are remarkably resistant to high temperature, air, water, and silica gel chromatography. The Pd complexes catalyze Heck reactions.
Clyne
DS
Department of Chemistry, Ohio State University, Columbus 43210, USA.
Jin
J
Genest
E
Gallucci
JC
RajanBabu
TV