Reversible addition of ethylene to a pincer-based boryl-iridium unit with the formation of a bridging ethylidene.

ABSTRACT: This report examines reactions of a series of Ir complexes supported by the diarylboryl/bis(phosphine) PBP pincer ligand with ethylene: (PBP)IrH₄ (1), (PBP)IrH₂(CO) (2), and (PBP)Ir(CO)₂ (3). The outcomes of these reactions differ from those typical for Ir complexes supported by other pincer ligands and do not give rise to simple ethylene adducts or products of insertion of Ir into the C-H bond of ethylene. Instead, the elements of ethylene are incorporated into the molecules to result in B-C bonds. In the case of 2 and 3, ethylene addition results in the formation of B/Ir bridging ethylidene complexes 5 and 6. For 6, the addition of ethylene (and the analogous addition of 1-hexene) is shown to be part

SUBMITTER: Cao Y 

PROVIDER: S-EPMC8162418 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature