Add time:08/09/2019         Source:sciencedirect.com

Reactions of 2-(arylazo)aniline, HL (H represents the dissociable protons upon orthometallation and HL is p-RC6H4NNC6H4–NH2; RH for HL1; CH3 for HL2 and Cl for HL3) with IrCl3 in methanol afforded orthometallated complexes of composition (L)(HL)IrCl2 (2) and (L)(MeOH)IrCl2 (3), respectively. Complex (L)(MeOH)IrCl2 (3) converted into (L)(CH3CN)IrCl2 (4) upon refluxing in acetonitrile. The X-ray structure of the complexes (L1)(HL1)IrCl2 (2a) and (L3)(CH3CN)IrCl2 (4c) have been determined and characterized unequivocally. The anionic L− binds the metal in tridentate (C, N, N) manner for all the complexes.

► Reaction of IrCl3 with 2-(arylazo)aniline has been reported for the first time. ► New orthometallated Ir(III) complexes have been synthesized and characterized unequivocally which is important in terms of C–H activation. ► Subtle mismatch in the properties of RhCl3 and IrCl3 have been proposed on the basis of experimental results.

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