Front Cover Picture: An Update on Phosphine‐Imidazolin‐2‐Imine Iridium(I) Catalysts for Hydrogen Isotope Exchange (Adv. Synth. Catal. 3/2023). Issue 3 (16th November 2022) - Becker, Daniel
Abstract : The front cover picture shows the centrosymmetric structure of a diiridium tetrahydride complex, with the iridium atoms showing rare square‐pyramidal coordination spheres. This species forms under dihydrogen atmosphere from a cationic phosphine‐imidazolin‐2‐imine iridium(I) complex, which is an established (pre‐)catalyst for ortho ‐directed hydrogen isotope exchange (HIE). Two derivatives of the so‐called Tamm's Catalyst with fluoroborate and fluoroaluminate counterions could be crystallographically characterized. Details can be found in the Update provided by Matthias Tamm and co‐workers (D. Becker, D. Bockfeld, M. Tamm, Adv. Synth. Catal . 2023, 365, 367–372; DOI: 10.1002/adsc.202201084 ).