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First Chelated Chiral N-Heterocyclic Bis-Carbene Complexes

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journal contribution
posted on 2000-03-25, 00:00 authored by Dean S. Clyne, Jian Jin, Evan Genest, Judith C. Gallucci, T. V. RajanBabu
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.