Synthesis, characterisation and theoretical studies of a series of Iridium (III) heteroleptic complexes with Schiff base ligands

Photoisomerisation of Exo‐Imine Complexes and the Role of MECP in the Reverse Thermal Equilibrium: An Experimental and DFT Computational Investigation**

“…The structure of trans ‐ 7 a‐Ph is shown in Figure 4. The metal‐ligand bond lengths for the two cyclometallated ligands are statistically the same as those reported for the cis isomer [26] . However, the Ir−O and Ir−N(imine) [2.145(4) and 2.191(5) Å respectively] are both longer in the trans isomer than in the cis isomer [2.122(3) and 2.149(3) Å respectively] suggesting there may be slightly more steric crowding in the trans isomer.…”

In Silico and In Vitro Antiproliferative Activity Assessment of New Schiff Bases

“…Schiff bases have been broadly examined as ligands in coordination chemistry because of their straightforward synthesis and good solubility in widespread solvents. They also have an imine group that makes them significant ligands in coordination chemistry due to the electron donation ability of the C=N double bond [19,20] . By being stable under diverse reductive and oxidative conditions, imine ligands present a boundary between potent and impotent Lewis bases.…”

“…They also have an imine group that makes them significant ligands in coordination chemistry due to the electron donation ability of the C=N double bond. [19,20] By being stable under diverse reductive and oxidative conditions, imine ligands present a boundary between potent and impotent Lewis bases.…”

Unexpected ortho C–H bond activation in coordinated 7,8-benzoquinoline: synthesis and characterisation of heteroleptic Ir(iii)-7,8-benzoquinoline complexes

“…The Ir–N1 bond (2.043(3) Å) at the axial position was found to be shorter compare to the Ir–N3 and Ir–N4 bond lengths. This could be the result of strong trans effects exerted by coordinating C11 and C14 on Ir–N4 and Ir–N3 bond lengths 30 respectively.…”

“…The assignment is consistent with the reported values of similar Ir( iii ) complexes. 30 The reduction peaks at −1.41 V and −1.32 V were assigned to the reduction of the coordinated pyridine-2-aldoxime moiety. These values were quite close to the reduction potential of free pyridine-2-aldoxime value at −1.14 V. The DFT calculations of complex (3) also predicted the large distribution of LUMO over pyridine-2-aldoxime making it susceptible to reduction and which was reflected from the observed low reduction potential.…”