Abstract
The crystal structures of tris[9,9-dihexy1-2-(5-methoxypyridin-2-yl-kappa N)-9H-fluoren-3-yl-kappa C-3]iridium pentane monosolvate, [Ir(C31H38NO)(3)]center dot C5H12, (I), di-mu(2)-chlorido-bisfbis [2-(5-fluoropyridin-2-yl)-9,9-dihexy1-9H-fluoren-3-yl]iridium} pentane 0.3-solvate, [Ir-2(C30H35FN)(4)Cl-2]center dot 0.3C(5)H(12), (II), di-mu(2)-cyanatobisfbis [9,9-dihexy1-2-(5-methoxypyridin-2-y1)-9H-fluoren-1-yl]iridiuml pentane monosolvate, [Ir-2(C31H38NO)(4)(NCO)(2)(NCO)(2)]center dot C5H12, (III), and {mu-N,N'-bis[3,5-bis(trifluoromethyl)phenyl]oxamidatolbis(bis{2[4-(2,4,6-trimethylphenyl)-pyridin-2-yl]phenyl-kappa C-2(1),N'}iridium)-chlorobenzene pentane (1/2.3/0.4), [Ir-2(C20H19N)(4)(C18H6F12N2O2)]center dot 2.3C(6)H(5)Cl center dot 0.4C(5)H(12), (IV), synthesized in the quest for organic light-emitting devices, were determined. The bis-mu(2)-chloro and bis-mu(2)-cyanato complexes have Delta Delta and Lambda Lambda configurations of the distorted octahedral Ir centres in racemic crystals, whereas the oxamido complex has a centrosymmetric (meso) structure with the Delta Lambda configuration. The bridging oxamido moiety has a nearly planar anti geometry. All structures show substantial disorder of both host molecules and solvents of crystallization.