Unique Class of Enantiopure N-Heterocyclic Carbene Half-Sandwich Iridium(III) Complexes with Stable Configurations: Probing Five-Membered versus Six-Membered Iridacycles

Antoine Groué (1) , Jean-Philippe Tranchier (1) , Marie-Noelle Rager (2) , Geoffrey Gontard (1) , Marion Jean (3) , Nicolas Vanthuyne (3) , Harrison R. Pearce (4) , Andrew L. Cooksy (4) , Hani Amouri (1)

1 IPCM - Institut Parisien de Chimie Moléculaire
2 ENSCP - Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL
3 ISM2 - Institut des Sciences Moléculaires de Marseille
4 UC San Diego - University of California [San Diego]

A unique class of enantiopure N-heterocyclic carbene half-sandwich iridium complexes is reported. These compounds display stable configurations at the metal center, as demonstrated by their chiroptical properties. Remarkably, because of the nature of the naphthalimide molecule, two regioisomers containing five-membered [(R)-2a and (S)-2a] and six-membered [(R)-2b and (S)-2b] iridacycles were obtained. Density functional theory calculations are advanced to rationalize their relative stability.

Domaines: Chimie de coordination

Antoine Groué, Jean-Philippe Tranchier, Marie-Noelle Rager, Geoffrey Gontard, Marion Jean, et al.. Unique Class of Enantiopure N-Heterocyclic Carbene Half-Sandwich Iridium(III) Complexes with Stable Configurations: Probing Five-Membered versus Six-Membered Iridacycles. Inorganic Chemistry, 2019, 58 (5), pp.2930-2933. ⟨10.1021/acs.inorgchem.8b03469⟩. ⟨hal-02166440⟩