(2,9-Dimethyl-1,10-phenanthroline)bis-[2-(pyridin-2-yl)phen-yl]iridium(III) hexa-fluoro-phosphate and (2,9-dimethyl-1,10-phenanthroline)bis-[5-methyl-2-(pyridin-2-yl)phen-yl]iridium(III) hexa-fluoro-phosphate-diethyl ether-aceto-nitrile (1/0.61/0.78).

The title compounds, [Ir(C(14)H(12)N(2))(C(11)H(8)N)(2)]PF(6) (1) and [Ir(C(14)H(12)N(2))(C(12)H(10)N)(2)]PF(6)·0.61C(2)H(10)O·0.78CH(3)CN (2), crystallize in the space groups Pbca and P1, respectively, each structure containing one monocationic Ir complex and one PF(6) (-) anion in the asymmetric unit. The anion and solvent in compound 2 are disordered. The Ir-N(phenanthroline) bond lengths of ca. 2.21†à indicate a greater steric effect of the 2,9-dimethyl-1,10-phenanthroline ligand compared to 1,10-phenanthroline. Both structures show offset parallel inter-molecular π-π inter-actions between the pyridine rings of the phenanthroline ligands, and that of 1 also exhibits similar inter-actions between the phenyl and pyridine rings of the phenyl-pyridine ligands.