ИСТИНА

In recent contribution we present the latest results of spectroscopic (UV/vis, IR, NMR) and theoretical (DFT) investigation of associative/dissociative processes involving stereoisomeric iridium(III) (PCsp3P)IrH(Cl) (PCsp3P = 1,8-bis-(diisopropylphosphino)triptycene) complexes and N-nucleophiles (acetonitrile and pyridine) (Figure). All penta and hexacoordinate complexes, which could be considered as models of catalytic reaction intermediates, were characterized. It was shown, that stabilization of Cl ligand by Cl···H hydrogen bond and its migration from apical (trans to hydride ligand) to original equatorial (trans to metalated C(sp3)) position should play the key role in energy of associative/dissociative processes taking place during catalytical cycle proceeds. Mechanism of catalitycal isomerization of alkenes based on an insertion/elimination sequence was proposed (Figure) as a result of current research.