Development of Planar Chiral Five-Membered Cyclic (Amino)(ferrocenylene)carbene Ligand and Its Iridium Dicarbonyl Complex

Abstract

Abstract A five-membered cyclic (amino)(ferrocenylene)carbene (CAFeC) ligand was developed as the counterpart of existing seven- and six-membered planar chiral CAFeC ligands to enrich the series. The novel CAFeC was subjected to carbene trapping experiments with sulfur and an iridium complex. The resulting sulfur adduct and Ir dicarbonyl complex were fully characterized by X-ray diffraction analysis, high-resolution mass spectrometry, and multinuclear NMR spectroscopy. The Tolman electronic parameter (TEP) of the Ir dicarbonyl complex revealed that the donor strength of the new CAFeC is high, as expected.