metal-organic compounds
(Acetylacetonato-κ2O,O′)bis[5-methoxy-2-(naphth[1,2-d][1,3]oxazol-2-yl)phenyl-κ2C1,N]iridium(III)
aInstitute of Electric Power, North China University of Water Resources and Electric Power, 450011, Zhengzhou, People's Republic of China, bDepartment of Environment Engineering and Chemistry, Luoyang Institute of Science and Technology, 471023, Luoyang, People's Republic of China, cChemistry Department, Zhengzhou University, 450052, Zhengzhou, People's Republic of China, and dInstitute of Environmental & Municipal Engineering, North China University of Water Resources and Electric Power, 450011, Zhengzhou, People's Republic of China
*Correspondence e-mail: yinguojie000000@yahoo.com.cn
In the title compound, [Ir(C18H12NO2)2(C5H7O2)], the Ir atom is O,O′-chelated by the acetylacetonate group and C,N-chelated by the 2-arylnaphth[1,2-d]oxazole groups. The six-coordinate metal atom displays a distorted octahedral geometry. Intramolecular C—H⋯O hydrogen bonds occur. In the crystal, intermolecular C—H⋯O hydrogen bonds link the molecules into columns parallel to the b axis.
Related literature
For the syntheses and reactions of some 2-arylnaphth[1,2-d]oxazole derivatives, see: Abbady (1979). For the syntheses and characterization of phosphorescent cyclometalated iridium complexes, see: Lamansky et al. (2001).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2001); cell SAINT (Bruker, 2001); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536811035690/rz2632sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811035690/rz2632Isup2.hkl
The ligand 2-arylnaphth[1,2-d]oxazole was prepared according to the literature (Abbady, 1979). The ligand (0.61 g, 2.2 mmol) and IrCl3.3H2O (0.35 g, 1 mmol) were added to 20 ml 2-ethoxyethanol:H2O (3:1, v/v) solution under
atmosphere at 393 K for 24 h, and then the intermediate product, acetylacetonate (10 ml) and Na2CO3 (1.06 g, 10 mmol) were refluxed for 12 h. After cooling to room temperature, the coloured precipitate was filtered and washed with ethanol and water. The crude product was flash chromatographed using a silica/dichloromethane column to yield ca. 40% of the pure title compound after solvent evaporation and drying.H atoms were positioned geometrically and refined using a riding model with C—H =0.93–0.96 Å and with Uiso(H) = 1.2 (1.5 for methyl groups) times Ueq(C).
According to the study of Lamansky's group in 2001 (Lamansky et al., 2001), the luminous wavelength of complexes would change as the the
of (C—N) changed. Therefore, the arylnaphthoxazoles ligand was choosed to regulate luminous wavelength of phosphorescent materials, leading to get better electrophosphorescent materials.The title complex is a mononuclear iridium(III) complex (Fig. 1), in which the environment around the IrIII ion is a distorted octahedral coordination geometry, the coordination conformation of the C, N and O atoms of the ligands adopt the cis-, trans- and cis- respectively, which is consistent with the similar reported complexes (Lamansky et al., 2001). It can be illustrated from the figure that the carbon-metal bond is formed between IrIII ion and the carbon atom on the benzene ring rather than the C atom on the naphthalene ring. It shows from Table 1 that the increase of the bond distance from Ir—C to Ir—N and Ir—O is caused by the increase of the covalent component between the coordination atoms from C to N and O of which the
decreases gradually. Moreover, there are two five-membered rings formed (Ir1/C1/C6/C7/N1 and Ir1/C19/C24/C25/N2), the average deviation of which are 0.0186 Å and 0.0387 Å, and the dihedral angle they form with their adjacent benzene rings (C1–C6) and (C19–C24) are 3.5 (2)° and 4.9 (3)° respectively. The dihedral angle with their adjacent oxazole heterocycle (N1/O1/C7–17) and (N2/O3/C25–35) are 9.0 (2)° and 8.0 (2)° respectively. The molecular comformation is stabilized by intramolecular C—H···O hydrogen bonds (Table 2). In the intermolecular C—H···O hydrogen bonds (Table 2) link molecules into columns parallel to the b axis.For the syntheses and reactions of some 2-arylnaphth[1,2-d]oxazole derivatives, see: Abbady (1979). For the syntheses and characterization of phosphorescent cyclometalated iridium complexes, see: Lamansky et al. (2001).
Data collection: SMART (Bruker 2001); cell
SAINT (Bruker 2001); data reduction: SAINT (Bruker 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The molecular structure of the title complex with displacement ellipsoids drawn at the 30% probability level. Hydrogen atoms are omitted for clarity. |
[Ir(C18H12NO2)2(C5H7O2)] | F(000) = 1664 |
Mr = 839.88 | Dx = 1.689 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 168 reflections |
a = 16.618 (3) Å | θ = 2.5–26.0° |
b = 11.455 (2) Å | µ = 4.10 mm−1 |
c = 18.993 (4) Å | T = 293 K |
β = 114.01 (3)° | Prismatic, yellow |
V = 3302.5 (13) Å3 | 0.30 × 0.20 × 0.20 mm |
Z = 4 |
Bruker SMART CCD area detector diffractometer | 7866 independent reflections |
Radiation source: fine-focus sealed tube | 7275 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.042 |
phi and ω scans | θmax = 27.9°, θmin = 2.2° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | h = −21→21 |
Tmin = 0.373, Tmax = 0.495 | k = −15→14 |
40039 measured reflections | l = −24→24 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.039 | H-atom parameters not refined |
wR(F2) = 0.093 | w = 1/[σ2(Fo2) + (0.049P)2 + 2.9P] where P = (Fo2 + 2Fc2)/3 |
S = 1.04 | (Δ/σ)max = 0.001 |
7866 reflections | Δρmax = 1.19 e Å−3 |
452 parameters | Δρmin = −0.79 e Å−3 |
0 restraints | Extinction correction: SHELXL, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.000124 |
[Ir(C18H12NO2)2(C5H7O2)] | V = 3302.5 (13) Å3 |
Mr = 839.88 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 16.618 (3) Å | µ = 4.10 mm−1 |
b = 11.455 (2) Å | T = 293 K |
c = 18.993 (4) Å | 0.30 × 0.20 × 0.20 mm |
β = 114.01 (3)° |
Bruker SMART CCD area detector diffractometer | 7866 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | 7275 reflections with I > 2σ(I) |
Tmin = 0.373, Tmax = 0.495 | Rint = 0.042 |
40039 measured reflections |
R[F2 > 2σ(F2)] = 0.039 | 0 restraints |
wR(F2) = 0.093 | H-atom parameters not refined |
S = 1.04 | Δρmax = 1.19 e Å−3 |
7866 reflections | Δρmin = −0.79 e Å−3 |
452 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
Ir1 | 0.283405 (9) | 0.883603 (13) | 0.016855 (9) | 0.03107 (8) | |
C1 | 0.2104 (2) | 0.7556 (4) | −0.0502 (2) | 0.0333 (9) | |
C2 | 0.2356 (3) | 0.6436 (4) | −0.0595 (3) | 0.0400 (10) | |
H2A | 0.2948 | 0.6231 | −0.0358 | 0.048* | |
C3 | 0.1744 (3) | 0.5607 (4) | −0.1037 (3) | 0.0433 (10) | |
C4 | 0.0850 (3) | 0.5876 (5) | −0.1400 (3) | 0.0497 (12) | |
H4A | 0.0447 | 0.5323 | −0.1701 | 0.060* | |
C5 | 0.0575 (3) | 0.6967 (4) | −0.1305 (3) | 0.0485 (12) | |
H5A | −0.0020 | 0.7160 | −0.1540 | 0.058* | |
C6 | 0.1186 (3) | 0.7791 (4) | −0.0857 (3) | 0.0390 (10) | |
C7 | 0.0990 (3) | 0.8925 (4) | −0.0681 (3) | 0.0383 (10) | |
C8 | 0.0285 (3) | 1.0503 (4) | −0.0648 (3) | 0.0442 (11) | |
C9 | −0.0388 (4) | 1.1294 (5) | −0.0754 (3) | 0.0572 (15) | |
H9A | −0.0977 | 1.1110 | −0.1038 | 0.069* | |
C10 | −0.0131 (4) | 1.2354 (5) | −0.0418 (3) | 0.0608 (15) | |
H10A | −0.0560 | 1.2899 | −0.0451 | 0.073* | |
C11 | 0.0772 (4) | 1.2659 (5) | −0.0016 (3) | 0.0545 (13) | |
C12 | 0.1028 (5) | 1.3789 (5) | 0.0288 (4) | 0.0690 (18) | |
H12A | 0.0595 | 1.4319 | 0.0269 | 0.083* | |
C13 | 0.1882 (5) | 1.4127 (5) | 0.0608 (4) | 0.0721 (18) | |
H13A | 0.2030 | 1.4877 | 0.0806 | 0.086* | |
C14 | 0.2539 (4) | 1.3346 (5) | 0.0639 (3) | 0.0636 (15) | |
H14A | 0.3123 | 1.3592 | 0.0832 | 0.076* | |
C15 | 0.2333 (3) | 1.2218 (4) | 0.0388 (3) | 0.0488 (11) | |
H15A | 0.2782 | 1.1701 | 0.0430 | 0.059* | |
C16 | 0.1460 (3) | 1.1836 (4) | 0.0070 (3) | 0.0457 (11) | |
C17 | 0.1165 (3) | 1.0700 (4) | −0.0234 (3) | 0.0403 (10) | |
C18 | 0.1518 (4) | 0.3653 (4) | −0.1511 (4) | 0.0623 (15) | |
H18A | 0.1853 | 0.2965 | −0.1497 | 0.093* | |
H18B | 0.1201 | 0.3897 | −0.2035 | 0.093* | |
H18C | 0.1108 | 0.3484 | −0.1285 | 0.093* | |
C19 | 0.3098 (2) | 0.9591 (3) | −0.0666 (2) | 0.0326 (8) | |
C20 | 0.2626 (3) | 1.0416 (4) | −0.1207 (2) | 0.0371 (9) | |
H20A | 0.2070 | 1.0631 | −0.1245 | 0.045* | |
C21 | 0.2958 (3) | 1.0938 (4) | −0.1699 (3) | 0.0395 (10) | |
C22 | 0.3789 (3) | 1.0652 (4) | −0.1654 (3) | 0.0437 (10) | |
H22A | 0.4014 | 1.1023 | −0.1970 | 0.052* | |
C23 | 0.4275 (3) | 0.9816 (4) | −0.1140 (3) | 0.0423 (10) | |
H23A | 0.4825 | 0.9599 | −0.1115 | 0.051* | |
C24 | 0.3936 (3) | 0.9294 (4) | −0.0655 (2) | 0.0353 (9) | |
C25 | 0.4352 (3) | 0.8390 (4) | −0.0116 (3) | 0.0375 (9) | |
C26 | 0.5213 (3) | 0.6961 (4) | 0.0445 (3) | 0.0434 (10) | |
C27 | 0.5894 (3) | 0.6147 (5) | 0.0656 (4) | 0.0567 (14) | |
H27A | 0.6318 | 0.6163 | 0.0453 | 0.068* | |
C28 | 0.5899 (3) | 0.5331 (5) | 0.1174 (3) | 0.0580 (14) | |
H28A | 0.6337 | 0.4763 | 0.1327 | 0.070* | |
C29 | 0.5257 (3) | 0.5314 (4) | 0.1492 (3) | 0.0490 (12) | |
C30 | 0.5291 (4) | 0.4462 (5) | 0.2044 (3) | 0.0586 (14) | |
H30A | 0.5739 | 0.3908 | 0.2201 | 0.070* | |
C31 | 0.4684 (4) | 0.4443 (5) | 0.2344 (3) | 0.0605 (14) | |
H31A | 0.4715 | 0.3872 | 0.2702 | 0.073* | |
C32 | 0.4011 (4) | 0.5264 (5) | 0.2124 (3) | 0.0610 (14) | |
H32A | 0.3603 | 0.5246 | 0.2345 | 0.073* | |
C33 | 0.3941 (4) | 0.6101 (4) | 0.1586 (3) | 0.0484 (12) | |
H33A | 0.3479 | 0.6634 | 0.1435 | 0.058* | |
C34 | 0.4560 (3) | 0.6157 (4) | 0.1264 (3) | 0.0406 (10) | |
C35 | 0.4572 (3) | 0.7002 (4) | 0.0720 (3) | 0.0382 (9) | |
C36 | 0.2760 (4) | 1.2488 (5) | −0.2607 (3) | 0.0625 (15) | |
H36A | 0.2304 | 1.3002 | −0.2933 | 0.094* | |
H36B | 0.2972 | 1.2026 | −0.2918 | 0.094* | |
H36C | 0.3236 | 1.2941 | −0.2248 | 0.094* | |
C37 | 0.2550 (4) | 0.7829 (6) | 0.2320 (3) | 0.0692 (16) | |
H37A | 0.2206 | 0.7168 | 0.2053 | 0.104* | |
H37B | 0.2206 | 0.8310 | 0.2507 | 0.104* | |
H37C | 0.3067 | 0.7564 | 0.2747 | 0.104* | |
C38 | 0.2818 (3) | 0.8530 (5) | 0.1775 (3) | 0.0485 (12) | |
C39 | 0.3321 (4) | 0.9528 (5) | 0.2054 (3) | 0.0566 (13) | |
H39A | 0.3440 | 0.9733 | 0.2561 | 0.068* | |
C40 | 0.3666 (3) | 1.0257 (4) | 0.1659 (3) | 0.0436 (11) | |
C41 | 0.4168 (4) | 1.1320 (5) | 0.2078 (4) | 0.0654 (16) | |
H41A | 0.4372 | 1.1748 | 0.1748 | 0.098* | |
H41B | 0.4663 | 1.1081 | 0.2534 | 0.098* | |
H41C | 0.3788 | 1.1809 | 0.2220 | 0.098* | |
O1 | 0.01686 (18) | 0.9383 (3) | −0.09431 (19) | 0.0458 (8) | |
O2 | 0.2092 (2) | 0.4554 (3) | −0.1090 (2) | 0.0568 (9) | |
O3 | 0.50843 (19) | 0.7840 (3) | −0.0083 (2) | 0.0459 (8) | |
O4 | 0.2417 (2) | 1.1741 (3) | −0.2197 (2) | 0.0554 (9) | |
O5 | 0.25520 (19) | 0.8129 (3) | 0.10959 (18) | 0.0422 (7) | |
O6 | 0.35994 (18) | 1.0133 (3) | 0.09775 (18) | 0.0402 (7) | |
N1 | 0.1604 (2) | 0.9649 (3) | −0.0240 (2) | 0.0357 (8) | |
N2 | 0.4017 (2) | 0.7958 (3) | 0.0350 (2) | 0.0332 (7) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ir1 | 0.02440 (10) | 0.03730 (12) | 0.03357 (11) | 0.00402 (6) | 0.01390 (7) | 0.00183 (6) |
C1 | 0.0253 (19) | 0.045 (2) | 0.031 (2) | 0.0023 (17) | 0.0132 (16) | 0.0050 (17) |
C2 | 0.030 (2) | 0.049 (3) | 0.038 (2) | 0.0034 (19) | 0.0104 (18) | 0.0009 (19) |
C3 | 0.040 (2) | 0.043 (3) | 0.051 (3) | 0.000 (2) | 0.024 (2) | −0.004 (2) |
C4 | 0.036 (2) | 0.052 (3) | 0.055 (3) | −0.005 (2) | 0.013 (2) | −0.010 (2) |
C5 | 0.028 (2) | 0.057 (3) | 0.055 (3) | 0.005 (2) | 0.011 (2) | 0.000 (2) |
C6 | 0.029 (2) | 0.046 (2) | 0.041 (2) | 0.0008 (18) | 0.0132 (18) | −0.0030 (19) |
C7 | 0.026 (2) | 0.050 (3) | 0.040 (2) | 0.0080 (17) | 0.0146 (18) | 0.0052 (19) |
C8 | 0.035 (2) | 0.056 (3) | 0.047 (3) | 0.014 (2) | 0.023 (2) | 0.012 (2) |
C9 | 0.041 (3) | 0.076 (4) | 0.062 (3) | 0.029 (3) | 0.029 (3) | 0.026 (3) |
C10 | 0.062 (3) | 0.062 (4) | 0.074 (4) | 0.032 (3) | 0.043 (3) | 0.020 (3) |
C11 | 0.060 (3) | 0.054 (3) | 0.059 (3) | 0.025 (3) | 0.033 (3) | 0.015 (2) |
C12 | 0.087 (5) | 0.050 (3) | 0.075 (4) | 0.031 (3) | 0.038 (4) | 0.009 (3) |
C13 | 0.097 (5) | 0.049 (3) | 0.073 (4) | 0.011 (3) | 0.036 (4) | 0.003 (3) |
C14 | 0.075 (4) | 0.046 (3) | 0.064 (4) | 0.009 (3) | 0.023 (3) | 0.004 (3) |
C15 | 0.053 (3) | 0.047 (3) | 0.048 (3) | 0.012 (2) | 0.022 (2) | 0.006 (2) |
C16 | 0.052 (3) | 0.049 (3) | 0.043 (3) | 0.015 (2) | 0.026 (2) | 0.011 (2) |
C17 | 0.035 (2) | 0.047 (3) | 0.045 (3) | 0.015 (2) | 0.023 (2) | 0.012 (2) |
C18 | 0.065 (4) | 0.045 (3) | 0.076 (4) | −0.002 (3) | 0.028 (3) | −0.009 (3) |
C19 | 0.0285 (19) | 0.035 (2) | 0.037 (2) | −0.0011 (16) | 0.0169 (17) | 0.0007 (17) |
C20 | 0.037 (2) | 0.040 (2) | 0.039 (2) | 0.0033 (18) | 0.0199 (18) | 0.0045 (18) |
C21 | 0.048 (3) | 0.039 (2) | 0.033 (2) | 0.0000 (19) | 0.019 (2) | −0.0004 (18) |
C22 | 0.051 (3) | 0.050 (3) | 0.042 (3) | −0.006 (2) | 0.031 (2) | −0.002 (2) |
C23 | 0.037 (2) | 0.051 (3) | 0.047 (3) | 0.001 (2) | 0.025 (2) | −0.001 (2) |
C24 | 0.030 (2) | 0.042 (2) | 0.038 (2) | 0.0003 (18) | 0.0185 (18) | −0.0013 (18) |
C25 | 0.0275 (19) | 0.043 (2) | 0.043 (2) | 0.0061 (18) | 0.0157 (18) | −0.0017 (19) |
C26 | 0.033 (2) | 0.047 (3) | 0.051 (3) | 0.0080 (19) | 0.018 (2) | 0.001 (2) |
C27 | 0.039 (3) | 0.069 (4) | 0.066 (4) | 0.020 (2) | 0.025 (3) | 0.007 (3) |
C28 | 0.042 (3) | 0.060 (3) | 0.066 (4) | 0.022 (2) | 0.017 (3) | 0.007 (3) |
C29 | 0.046 (3) | 0.046 (3) | 0.046 (3) | 0.012 (2) | 0.010 (2) | 0.001 (2) |
C30 | 0.056 (3) | 0.047 (3) | 0.055 (3) | 0.015 (2) | 0.005 (3) | 0.007 (2) |
C31 | 0.076 (4) | 0.046 (3) | 0.051 (3) | 0.004 (3) | 0.018 (3) | 0.006 (2) |
C32 | 0.066 (3) | 0.060 (3) | 0.061 (4) | −0.002 (3) | 0.030 (3) | 0.007 (3) |
C33 | 0.049 (3) | 0.047 (3) | 0.052 (3) | 0.003 (2) | 0.023 (2) | 0.002 (2) |
C34 | 0.039 (2) | 0.038 (2) | 0.039 (2) | 0.0028 (18) | 0.010 (2) | 0.0010 (18) |
C35 | 0.027 (2) | 0.044 (2) | 0.040 (2) | 0.0061 (18) | 0.0105 (17) | −0.0017 (19) |
C36 | 0.089 (4) | 0.058 (3) | 0.049 (3) | 0.006 (3) | 0.037 (3) | 0.015 (3) |
C37 | 0.076 (4) | 0.091 (4) | 0.052 (3) | 0.007 (3) | 0.039 (3) | 0.014 (3) |
C38 | 0.042 (3) | 0.066 (3) | 0.044 (3) | 0.020 (2) | 0.024 (2) | 0.009 (2) |
C39 | 0.061 (3) | 0.066 (3) | 0.044 (3) | 0.005 (3) | 0.022 (2) | −0.006 (2) |
C40 | 0.034 (2) | 0.050 (3) | 0.042 (3) | 0.010 (2) | 0.0107 (19) | −0.008 (2) |
C41 | 0.060 (4) | 0.063 (4) | 0.065 (4) | −0.001 (3) | 0.017 (3) | −0.016 (3) |
O1 | 0.0278 (15) | 0.058 (2) | 0.0507 (19) | 0.0074 (14) | 0.0150 (14) | 0.0050 (16) |
O2 | 0.0469 (19) | 0.0436 (19) | 0.074 (3) | 0.0006 (15) | 0.0181 (18) | −0.0136 (17) |
O3 | 0.0318 (15) | 0.057 (2) | 0.056 (2) | 0.0130 (14) | 0.0247 (14) | 0.0084 (16) |
O4 | 0.059 (2) | 0.055 (2) | 0.057 (2) | 0.0100 (17) | 0.0291 (18) | 0.0214 (17) |
O5 | 0.0372 (16) | 0.0557 (19) | 0.0395 (17) | 0.0050 (14) | 0.0215 (14) | 0.0086 (14) |
O6 | 0.0296 (14) | 0.0452 (17) | 0.0457 (18) | 0.0019 (13) | 0.0151 (13) | −0.0041 (14) |
N1 | 0.0253 (16) | 0.044 (2) | 0.042 (2) | 0.0092 (15) | 0.0175 (15) | 0.0079 (16) |
N2 | 0.0238 (16) | 0.0381 (19) | 0.0375 (19) | 0.0057 (14) | 0.0125 (14) | 0.0002 (15) |
Ir1—C1 | 1.997 (4) | C21—O4 | 1.364 (5) |
Ir1—C19 | 2.004 (4) | C21—C22 | 1.387 (6) |
Ir1—N1 | 2.088 (3) | C22—C23 | 1.371 (6) |
Ir1—N2 | 2.109 (3) | C22—H22A | 0.9300 |
Ir1—O6 | 2.144 (3) | C23—C24 | 1.393 (6) |
Ir1—O5 | 2.156 (3) | C23—H23A | 0.9300 |
C1—C2 | 1.383 (6) | C24—C25 | 1.423 (6) |
C1—C6 | 1.420 (5) | C25—N2 | 1.318 (5) |
C2—C3 | 1.395 (6) | C25—O3 | 1.348 (5) |
C2—H2A | 0.9300 | C26—C35 | 1.365 (6) |
C3—O2 | 1.359 (5) | C26—O3 | 1.374 (6) |
C3—C4 | 1.394 (6) | C26—C27 | 1.393 (6) |
C4—C5 | 1.367 (7) | C27—C28 | 1.355 (8) |
C4—H4A | 0.9300 | C27—H27A | 0.9300 |
C5—C6 | 1.394 (6) | C28—C29 | 1.426 (7) |
C5—H5A | 0.9300 | C28—H28A | 0.9300 |
C6—C7 | 1.413 (6) | C29—C30 | 1.416 (7) |
C7—N1 | 1.317 (6) | C29—C34 | 1.433 (6) |
C7—O1 | 1.354 (5) | C30—C31 | 1.345 (8) |
C8—C17 | 1.369 (6) | C30—H30A | 0.9300 |
C8—O1 | 1.382 (6) | C31—C32 | 1.389 (8) |
C8—C9 | 1.388 (6) | C31—H31A | 0.9300 |
C9—C10 | 1.356 (8) | C32—C33 | 1.371 (7) |
C9—H9A | 0.9300 | C32—H32A | 0.9300 |
C10—C11 | 1.423 (8) | C33—C34 | 1.397 (7) |
C10—H10A | 0.9300 | C33—H33A | 0.9300 |
C11—C12 | 1.410 (8) | C34—C35 | 1.421 (6) |
C11—C16 | 1.440 (6) | C35—N2 | 1.420 (5) |
C12—C13 | 1.354 (10) | C36—O4 | 1.423 (6) |
C12—H12A | 0.9300 | C36—H36A | 0.9600 |
C13—C14 | 1.394 (9) | C36—H36B | 0.9600 |
C13—H13A | 0.9300 | C36—H36C | 0.9600 |
C14—C15 | 1.371 (7) | C37—C38 | 1.514 (7) |
C14—H14A | 0.9300 | C37—H37A | 0.9600 |
C15—C16 | 1.396 (7) | C37—H37B | 0.9600 |
C15—H15A | 0.9300 | C37—H37C | 0.9600 |
C16—C17 | 1.427 (7) | C38—O5 | 1.267 (6) |
C17—N1 | 1.410 (5) | C38—C39 | 1.388 (8) |
C18—O2 | 1.412 (6) | C39—C40 | 1.393 (7) |
C18—H18A | 0.9600 | C39—H39A | 0.9300 |
C18—H18B | 0.9600 | C40—O6 | 1.261 (5) |
C18—H18C | 0.9600 | C40—C41 | 1.507 (7) |
C19—C20 | 1.381 (6) | C41—H41A | 0.9600 |
C19—C24 | 1.426 (5) | C41—H41B | 0.9600 |
C20—C21 | 1.399 (6) | C41—H41C | 0.9600 |
C20—H20A | 0.9300 | ||
C1—Ir1—C19 | 94.82 (16) | C23—C22—C21 | 119.4 (4) |
C1—Ir1—N1 | 80.88 (15) | C23—C22—H22A | 120.3 |
C19—Ir1—N1 | 90.57 (14) | C21—C22—H22A | 120.3 |
C1—Ir1—N2 | 92.18 (14) | C22—C23—C24 | 119.4 (4) |
C19—Ir1—N2 | 81.11 (15) | C22—C23—H23A | 120.3 |
N1—Ir1—N2 | 168.72 (13) | C24—C23—H23A | 120.3 |
C1—Ir1—O6 | 174.57 (14) | C23—C24—C25 | 125.4 (4) |
C19—Ir1—O6 | 90.60 (14) | C23—C24—C19 | 122.9 (4) |
N1—Ir1—O6 | 99.37 (13) | C25—C24—C19 | 111.6 (4) |
N2—Ir1—O6 | 88.39 (12) | N2—C25—O3 | 114.4 (4) |
C1—Ir1—O5 | 88.16 (14) | N2—C25—C24 | 122.9 (4) |
C19—Ir1—O5 | 176.47 (14) | O3—C25—C24 | 122.6 (4) |
N1—Ir1—O5 | 88.03 (12) | C35—C26—O3 | 109.8 (4) |
N2—Ir1—O5 | 100.70 (12) | C35—C26—C27 | 125.6 (5) |
O6—Ir1—O5 | 86.43 (12) | O3—C26—C27 | 124.6 (4) |
C2—C1—C6 | 116.0 (4) | C28—C27—C26 | 115.8 (5) |
C2—C1—Ir1 | 128.7 (3) | C28—C27—H27A | 122.1 |
C6—C1—Ir1 | 114.8 (3) | C26—C27—H27A | 122.1 |
C1—C2—C3 | 121.5 (4) | C27—C28—C29 | 122.2 (5) |
C1—C2—H2A | 119.2 | C27—C28—H28A | 118.9 |
C3—C2—H2A | 119.2 | C29—C28—H28A | 118.9 |
O2—C3—C4 | 124.0 (4) | C30—C29—C28 | 120.8 (5) |
O2—C3—C2 | 114.9 (4) | C30—C29—C34 | 118.2 (5) |
C4—C3—C2 | 121.1 (4) | C28—C29—C34 | 121.0 (5) |
C5—C4—C3 | 118.9 (5) | C31—C30—C29 | 120.9 (5) |
C5—C4—H4A | 120.5 | C31—C30—H30A | 119.6 |
C3—C4—H4A | 120.5 | C29—C30—H30A | 119.6 |
C4—C5—C6 | 119.9 (4) | C30—C31—C32 | 120.9 (5) |
C4—C5—H5A | 120.0 | C30—C31—H31A | 119.6 |
C6—C5—H5A | 120.0 | C32—C31—H31A | 119.6 |
C5—C6—C7 | 125.9 (4) | C33—C32—C31 | 120.7 (6) |
C5—C6—C1 | 122.5 (4) | C33—C32—H32A | 119.6 |
C7—C6—C1 | 111.7 (4) | C31—C32—H32A | 119.6 |
N1—C7—O1 | 113.2 (4) | C32—C33—C34 | 120.3 (5) |
N1—C7—C6 | 122.4 (4) | C32—C33—H33A | 119.8 |
O1—C7—C6 | 124.4 (4) | C34—C33—H33A | 119.8 |
C17—C8—O1 | 109.0 (4) | C33—C34—C35 | 125.5 (4) |
C17—C8—C9 | 125.8 (5) | C33—C34—C29 | 119.0 (4) |
O1—C8—C9 | 125.2 (5) | C35—C34—C29 | 115.5 (4) |
C10—C9—C8 | 115.8 (5) | C26—C35—N2 | 106.7 (4) |
C10—C9—H9A | 122.1 | C26—C35—C34 | 119.9 (4) |
C8—C9—H9A | 122.1 | N2—C35—C34 | 133.4 (4) |
C9—C10—C11 | 122.2 (5) | O4—C36—H36A | 109.5 |
C9—C10—H10A | 118.9 | O4—C36—H36B | 109.5 |
C11—C10—H10A | 118.9 | H36A—C36—H36B | 109.5 |
C12—C11—C10 | 121.4 (5) | O4—C36—H36C | 109.5 |
C12—C11—C16 | 117.5 (5) | H36A—C36—H36C | 109.5 |
C10—C11—C16 | 121.1 (5) | H36B—C36—H36C | 109.5 |
C13—C12—C11 | 122.2 (5) | C38—C37—H37A | 109.5 |
C13—C12—H12A | 118.9 | C38—C37—H37B | 109.5 |
C11—C12—H12A | 118.9 | H37A—C37—H37B | 109.5 |
C12—C13—C14 | 119.7 (6) | C38—C37—H37C | 109.5 |
C12—C13—H13A | 120.1 | H37A—C37—H37C | 109.5 |
C14—C13—H13A | 120.1 | H37B—C37—H37C | 109.5 |
C15—C14—C13 | 120.6 (6) | O5—C38—C39 | 126.4 (5) |
C15—C14—H14A | 119.7 | O5—C38—C37 | 115.2 (5) |
C13—C14—H14A | 119.7 | C39—C38—C37 | 118.4 (5) |
C14—C15—C16 | 121.0 (5) | C38—C39—C40 | 127.2 (5) |
C14—C15—H15A | 119.5 | C38—C39—H39A | 116.4 |
C16—C15—H15A | 119.5 | C40—C39—H39A | 116.4 |
C15—C16—C17 | 126.0 (4) | O6—C40—C39 | 127.0 (5) |
C15—C16—C11 | 118.8 (5) | O6—C40—C41 | 115.6 (5) |
C17—C16—C11 | 115.1 (4) | C39—C40—C41 | 117.4 (5) |
C8—C17—N1 | 106.9 (4) | C40—C41—H41A | 109.5 |
C8—C17—C16 | 119.6 (4) | C40—C41—H41B | 109.5 |
N1—C17—C16 | 133.5 (4) | H41A—C41—H41B | 109.5 |
O2—C18—H18A | 109.5 | C40—C41—H41C | 109.5 |
O2—C18—H18B | 109.5 | H41A—C41—H41C | 109.5 |
H18A—C18—H18B | 109.5 | H41B—C41—H41C | 109.5 |
O2—C18—H18C | 109.5 | C7—O1—C8 | 104.9 (3) |
H18A—C18—H18C | 109.5 | C3—O2—C18 | 118.7 (4) |
H18B—C18—H18C | 109.5 | C25—O3—C26 | 104.3 (3) |
C20—C19—C24 | 115.4 (4) | C21—O4—C36 | 119.1 (4) |
C20—C19—Ir1 | 130.0 (3) | C38—O5—Ir1 | 126.4 (3) |
C24—C19—Ir1 | 114.4 (3) | C40—O6—Ir1 | 126.3 (3) |
C19—C20—C21 | 122.0 (4) | C7—N1—C17 | 105.9 (3) |
C19—C20—H20A | 119.0 | C7—N1—Ir1 | 110.1 (3) |
C21—C20—H20A | 119.0 | C17—N1—Ir1 | 144.0 (3) |
O4—C21—C22 | 124.2 (4) | C25—N2—C35 | 104.8 (3) |
O4—C21—C20 | 115.1 (4) | C25—N2—Ir1 | 109.4 (3) |
C22—C21—C20 | 120.7 (4) | C35—N2—Ir1 | 145.4 (3) |
C19—Ir1—C1—C2 | 95.3 (4) | C29—C30—C31—C32 | −0.5 (9) |
N1—Ir1—C1—C2 | −174.9 (4) | C30—C31—C32—C33 | 1.2 (9) |
N2—Ir1—C1—C2 | 14.0 (4) | C31—C32—C33—C34 | −1.5 (8) |
O5—Ir1—C1—C2 | −86.6 (4) | C32—C33—C34—C35 | −178.1 (5) |
C19—Ir1—C1—C6 | −93.0 (3) | C32—C33—C34—C29 | 1.2 (7) |
N1—Ir1—C1—C6 | −3.2 (3) | C30—C29—C34—C33 | −0.5 (7) |
N2—Ir1—C1—C6 | −174.2 (3) | C28—C29—C34—C33 | 179.5 (5) |
O5—Ir1—C1—C6 | 85.1 (3) | C30—C29—C34—C35 | 178.8 (4) |
C6—C1—C2—C3 | 2.4 (6) | C28—C29—C34—C35 | −1.1 (7) |
Ir1—C1—C2—C3 | 174.1 (3) | O3—C26—C35—N2 | −0.4 (5) |
C1—C2—C3—O2 | 178.6 (4) | C27—C26—C35—N2 | −179.7 (5) |
C1—C2—C3—C4 | −0.4 (7) | O3—C26—C35—C34 | 178.6 (4) |
O2—C3—C4—C5 | −180.0 (5) | C27—C26—C35—C34 | −0.7 (8) |
C2—C3—C4—C5 | −1.2 (8) | C33—C34—C35—C26 | −179.8 (5) |
C3—C4—C5—C6 | 0.4 (8) | C29—C34—C35—C26 | 0.9 (6) |
C4—C5—C6—C7 | −176.7 (5) | C33—C34—C35—N2 | −1.1 (8) |
C4—C5—C6—C1 | 1.8 (8) | C29—C34—C35—N2 | 179.6 (4) |
C2—C1—C6—C5 | −3.2 (7) | O5—C38—C39—C40 | −3.1 (9) |
Ir1—C1—C6—C5 | −176.0 (4) | C37—C38—C39—C40 | 176.8 (5) |
C2—C1—C6—C7 | 175.6 (4) | C38—C39—C40—O6 | −1.4 (8) |
Ir1—C1—C6—C7 | 2.7 (5) | C38—C39—C40—C41 | 177.9 (5) |
C5—C6—C7—N1 | 178.7 (5) | N1—C7—O1—C8 | 1.0 (5) |
C1—C6—C7—N1 | 0.1 (6) | C6—C7—O1—C8 | −178.7 (4) |
C5—C6—C7—O1 | −1.6 (8) | C17—C8—O1—C7 | 1.4 (5) |
C1—C6—C7—O1 | 179.7 (4) | C9—C8—O1—C7 | −178.4 (5) |
C17—C8—C9—C10 | 0.6 (8) | C4—C3—O2—C18 | −2.7 (8) |
O1—C8—C9—C10 | −179.6 (5) | C2—C3—O2—C18 | 178.5 (5) |
C8—C9—C10—C11 | 3.2 (8) | N2—C25—O3—C26 | 1.3 (5) |
C9—C10—C11—C12 | 176.0 (6) | C24—C25—O3—C26 | −173.7 (4) |
C9—C10—C11—C16 | −1.7 (8) | C35—C26—O3—C25 | −0.5 (5) |
C10—C11—C12—C13 | −173.7 (6) | C27—C26—O3—C25 | 178.8 (5) |
C16—C11—C12—C13 | 4.1 (9) | C22—C21—O4—C36 | −11.5 (7) |
C11—C12—C13—C14 | 0.3 (10) | C20—C21—O4—C36 | 167.2 (4) |
C12—C13—C14—C15 | −3.6 (10) | C39—C38—O5—Ir1 | 2.2 (7) |
C13—C14—C15—C16 | 2.3 (9) | C37—C38—O5—Ir1 | −177.6 (3) |
C14—C15—C16—C17 | 177.7 (5) | C1—Ir1—O5—C38 | −179.5 (4) |
C14—C15—C16—C11 | 2.1 (7) | N1—Ir1—O5—C38 | −98.6 (4) |
C12—C11—C16—C15 | −5.2 (7) | N2—Ir1—O5—C38 | 88.6 (4) |
C10—C11—C16—C15 | 172.5 (5) | O6—Ir1—O5—C38 | 1.0 (3) |
C12—C11—C16—C17 | 178.8 (5) | C39—C40—O6—Ir1 | 5.7 (6) |
C10—C11—C16—C17 | −3.5 (7) | C41—C40—O6—Ir1 | −173.6 (3) |
O1—C8—C17—N1 | −3.1 (5) | C19—Ir1—O6—C40 | 173.3 (3) |
C9—C8—C17—N1 | 176.7 (5) | N1—Ir1—O6—C40 | 82.7 (3) |
O1—C8—C17—C16 | 174.2 (4) | N2—Ir1—O6—C40 | −105.6 (3) |
C9—C8—C17—C16 | −6.0 (7) | O5—Ir1—O6—C40 | −4.7 (3) |
C15—C16—C17—C8 | −168.7 (5) | O1—C7—N1—C17 | −2.9 (5) |
C11—C16—C17—C8 | 7.0 (6) | C6—C7—N1—C17 | 176.8 (4) |
C15—C16—C17—N1 | 7.8 (8) | O1—C7—N1—Ir1 | 177.7 (3) |
C11—C16—C17—N1 | −176.5 (5) | C6—C7—N1—Ir1 | −2.6 (5) |
C1—Ir1—C19—C20 | 87.0 (4) | C8—C17—N1—C7 | 3.6 (5) |
N1—Ir1—C19—C20 | 6.1 (4) | C16—C17—N1—C7 | −173.2 (5) |
N2—Ir1—C19—C20 | 178.4 (4) | C8—C17—N1—Ir1 | −177.4 (4) |
O6—Ir1—C19—C20 | −93.3 (4) | C16—C17—N1—Ir1 | 5.8 (9) |
C1—Ir1—C19—C24 | −98.6 (3) | C1—Ir1—N1—C7 | 3.0 (3) |
N1—Ir1—C19—C24 | −179.5 (3) | C19—Ir1—N1—C7 | 97.8 (3) |
N2—Ir1—C19—C24 | −7.1 (3) | N2—Ir1—N1—C7 | 55.6 (8) |
O6—Ir1—C19—C24 | 81.1 (3) | O6—Ir1—N1—C7 | −171.5 (3) |
C24—C19—C20—C21 | −1.2 (6) | O5—Ir1—N1—C7 | −85.4 (3) |
Ir1—C19—C20—C21 | 173.2 (3) | C1—Ir1—N1—C17 | −175.9 (5) |
C19—C20—C21—O4 | −179.5 (4) | C19—Ir1—N1—C17 | −81.1 (5) |
C19—C20—C21—C22 | −0.8 (7) | N2—Ir1—N1—C17 | −123.4 (7) |
O4—C21—C22—C23 | −179.0 (4) | O6—Ir1—N1—C17 | 9.6 (5) |
C20—C21—C22—C23 | 2.4 (7) | O5—Ir1—N1—C17 | 95.6 (5) |
C21—C22—C23—C24 | −1.9 (7) | O3—C25—N2—C35 | −1.5 (5) |
C22—C23—C24—C25 | 177.6 (4) | C24—C25—N2—C35 | 173.5 (4) |
C22—C23—C24—C19 | −0.1 (7) | O3—C25—N2—Ir1 | −176.0 (3) |
C20—C19—C24—C23 | 1.7 (6) | C24—C25—N2—Ir1 | −1.1 (5) |
Ir1—C19—C24—C23 | −173.6 (4) | C26—C35—N2—C25 | 1.1 (5) |
C20—C19—C24—C25 | −176.3 (4) | C34—C35—N2—C25 | −177.7 (5) |
Ir1—C19—C24—C25 | 8.4 (5) | C26—C35—N2—Ir1 | 172.0 (4) |
C23—C24—C25—N2 | 177.4 (4) | C34—C35—N2—Ir1 | −6.8 (9) |
C19—C24—C25—N2 | −4.7 (6) | C1—Ir1—N2—C25 | 99.0 (3) |
C23—C24—C25—O3 | −8.1 (7) | C19—Ir1—N2—C25 | 4.5 (3) |
C19—C24—C25—O3 | 169.8 (4) | N1—Ir1—N2—C25 | 47.4 (8) |
C35—C26—C27—C28 | 0.6 (8) | O6—Ir1—N2—C25 | −86.4 (3) |
O3—C26—C27—C28 | −178.6 (5) | O5—Ir1—N2—C25 | −172.5 (3) |
C26—C27—C28—C29 | −0.8 (8) | C1—Ir1—N2—C35 | −71.7 (5) |
C27—C28—C29—C30 | −178.8 (5) | C19—Ir1—N2—C35 | −166.3 (5) |
C27—C28—C29—C34 | 1.2 (8) | N1—Ir1—N2—C35 | −123.4 (7) |
C28—C29—C30—C31 | −179.8 (5) | O6—Ir1—N2—C35 | 102.9 (5) |
C34—C29—C30—C31 | 0.2 (8) | O5—Ir1—N2—C35 | 16.8 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
C15—H15A···O6 | 0.93 | 2.24 | 3.077 (5) | 150 |
C33—H33A···O5 | 0.93 | 2.22 | 3.137 (6) | 170 |
C23—H23A···O6i | 0.93 | 2.54 | 3.419 (6) | 157 |
C27—H27A···O2ii | 0.93 | 2.55 | 3.206 (6) | 128 |
Symmetry codes: (i) −x+1, −y+2, −z; (ii) −x+1, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | [Ir(C18H12NO2)2(C5H7O2)] |
Mr | 839.88 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 293 |
a, b, c (Å) | 16.618 (3), 11.455 (2), 18.993 (4) |
β (°) | 114.01 (3) |
V (Å3) | 3302.5 (13) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 4.10 |
Crystal size (mm) | 0.30 × 0.20 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART CCD area detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2004) |
Tmin, Tmax | 0.373, 0.495 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 40039, 7866, 7275 |
Rint | 0.042 |
(sin θ/λ)max (Å−1) | 0.658 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.093, 1.04 |
No. of reflections | 7866 |
No. of parameters | 452 |
H-atom treatment | H-atom parameters not refined |
Δρmax, Δρmin (e Å−3) | 1.19, −0.79 |
Computer programs: SMART (Bruker 2001), SAINT (Bruker 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
Ir1—C1 | 1.997 (4) | Ir1—N2 | 2.109 (3) |
Ir1—C19 | 2.004 (4) | Ir1—O6 | 2.144 (3) |
Ir1—N1 | 2.088 (3) | Ir1—O5 | 2.156 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
C15—H15A···O6 | 0.93 | 2.24 | 3.077 (5) | 150 |
C33—H33A···O5 | 0.93 | 2.22 | 3.137 (6) | 170 |
C23—H23A···O6i | 0.93 | 2.54 | 3.419 (6) | 157 |
C27—H27A···O2ii | 0.93 | 2.55 | 3.206 (6) | 128 |
Symmetry codes: (i) −x+1, −y+2, −z; (ii) −x+1, −y+1, −z. |
References
Abbady, M. A. (1979). Indian J. Chem. Sect. B, 17, 450–453. Google Scholar
Bruker (2001). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Lamansky, S., Djurovich, P., Murphy, D., Abdel-Razaq, F., Kwong, R., Tsyba, I., Bortz, M., Mui, B., Bau, R. & Thompson, M. E. (2001). Inorg. Chem. 40, 1704–1711. Web of Science CSD CrossRef PubMed CAS Google Scholar
Sheldrick, G. M. (2004). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
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According to the study of Lamansky's group in 2001 (Lamansky et al., 2001), the luminous wavelength of complexes would change as the the conjugated system of (C—N) changed. Therefore, the arylnaphthoxazoles ligand was choosed to regulate luminous wavelength of phosphorescent materials, leading to get better electrophosphorescent materials.
The title complex is a mononuclear iridium(III) complex (Fig. 1), in which the environment around the IrIII ion is a distorted octahedral coordination geometry, the coordination conformation of the C, N and O atoms of the ligands adopt the cis-, trans- and cis- respectively, which is consistent with the similar reported complexes (Lamansky et al., 2001). It can be illustrated from the figure that the carbon-metal bond is formed between IrIII ion and the carbon atom on the benzene ring rather than the C atom on the naphthalene ring. It shows from Table 1 that the increase of the bond distance from Ir—C to Ir—N and Ir—O is caused by the increase of the covalent component between the coordination atoms from C to N and O of which the electronegativity decreases gradually. Moreover, there are two five-membered rings formed (Ir1/C1/C6/C7/N1 and Ir1/C19/C24/C25/N2), the average deviation of which are 0.0186 Å and 0.0387 Å, and the dihedral angle they form with their adjacent benzene rings (C1–C6) and (C19–C24) are 3.5 (2)° and 4.9 (3)° respectively. The dihedral angle with their adjacent oxazole heterocycle (N1/O1/C7–17) and (N2/O3/C25–35) are 9.0 (2)° and 8.0 (2)° respectively. The molecular comformation is stabilized by intramolecular C—H···O hydrogen bonds (Table 2). In the crystal structure, intermolecular C—H···O hydrogen bonds (Table 2) link molecules into columns parallel to the b axis.