Synthesis of New Donor-Substituted Biphenyls: Pre-ligands for Highly Luminescent (C^C^D) Gold(III) Pincer Complexes.

ABSTRACT: We herein report on new synthetic strategies for the preparation of pyridine and imidazole substituted 2,2'-dihalo biphenyls. These structures are pre-ligands suitable for the preparation of respective stannoles. The latter can successfully be transmetalated to K[AuCl₄ ] forming non-palindromic [(C^C^D)Au^III ] pincer complexes featuring a lateral pyridine (D=N) or N-heterocyclic carbene (NHC, D=C') donor. The latter is the first report on a pincer complex with two formally anionic sp² and one carbenic carbon donor. The [(C^C^D)Au^III ] complexes show intense phosphorescence in solution at room temperature. We discuss the developed multistep strategy and touch upon synthetic challenges. The prepared complexes have been fully characterized including

SUBMITTER: Feuerstein W 

PROVIDER: S-EPMC7821303 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature