The crystal structure of bis­{35-di­fluoro-2-4-(246-tri­methyl­phen­yl)pyridin-2-ylphen­yl}(picolinato)iridium(III) and its 4-tert-butyl­pyridin-2-yl analogue

摘要

The crystal structures of bis­{3,5-di­fluoro-2-[4-(2,4,6-tri­methyl­phen­yl)pyridin-2-yl]phenyl-κ² N,C ¹}(picolinato-κ² N,O)iridium(III), [Ir(C20H16F2N)2(C6H4NO2)], >1, and bis­[2-(4-tert-butyl­pyridin-2-yl)-3,5-di­fluoro­phenyl-κ² N,C ¹](picolinato-κ² N,O)iridium(III), [Ir(C15H14F2N)2(C6H4NO2)], >2, are presented herein. These phospho­rescent cyclo­metallated iridium(III) compounds have been structurally investigated in order to better understand the nature of their blue-shifted emssions while maintaining high quantum yields. Compound >1 exhibits substantial twisting of the mesitylene rings out of the plane of the attached pyridine ring, with dihedral angles of 67.0 (1) and 78.7 (1)° between the best mean planes. For both compounds, the contribution of disordered solvent mol­ecule(s) was removed using the SQUEEZE [Spek (2015). Acta Cryst. C>71, 9–18] routine in PLATON [Spek (2015). Acta Cryst. C>71, 9–18]. These solvent mol­ecules are not considered in the given chemical formula and other crystal data.