US Patent Issued to SIGMA-ALDRICH on Sept. 8 for "Ferrocene-based unsymmetrical ligands bearing bulky di(adamantyl)phosphino motif and their metal catalysts" (Wisconsin, New Jersey Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,216, issued on Sept. 8, was assigned to SIGMA-ALDRICH Co. LLC (St. Louis).

"Ferrocene-based unsymmetrical ligands bearing bulky di(adamantyl)phosphino motif and their metal catalysts" was invented by Guolin Xu (Germantown, Wis.), Thomas Colacot (Cherry Hill, N.J.) and Peng Gao (Mequon, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Ferrocenyl-based unsymmetrical ligands containing di(1-adamantyl)phosphino groups with general formula, Fc(Ad2P) (R2P) and corresponding metal complexes, include metal halide complexes, N-biphenyl metal cationic complexes and R-allyl metal cationic complexes, useful in catalysis. The ligands and complexes overcome pr...