Home The crystal structure of 4,4′-((5-bromo-2-iodo-1,3-phenylene)bis(oxy))bis(tert-butylbenzene) ─ ethanol (2/1), C26H28BrIO2
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The crystal structure of 4,4′-((5-bromo-2-iodo-1,3-phenylene)bis(oxy))bis(tert-butylbenzene) ─ ethanol (2/1), C26H28BrIO2

  • Bangjin Sun ORCID logo and Zhenlong Tu EMAIL logo
Published/Copyright: January 5, 2024

Abstract

C26H28BrIO2, orthorhombic, Pbcn (no. 60), a = 20.2691(4) Å, b = 24.2958(5) Å, c = 10.5433(2) Å, V = 5192.09(18) Å3, Z = 8, Rgt(F) = 0.0483, wRref(F2) = 0.1406, T = 220 K.

CCDC no.: 2322513

Table 1 contains crystallographic data and Table 2 contain the list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal: Colourless block
Size: 0.15 × 0.13 × 0.12 mm
Wavelength:

μ:
CuKα radiation (1.54184 Å)

11.7 mm−1
Diffractometer, scan mode:

θmax, completeness:
SuperNova, ω

73.8°, >99 %
N(hkl)measured, N(hkl)unique, Rint: 13682, 5161, 0.052
Criterion for Iobs, N(hkl)gt: Iobs > 2 σ(Iobs), 4413
N(param)refined: 277
Programs: Bruker [1], SHELX [2, 3], Olex2 [4]
Table 2:

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).

Atom x y z Uiso*/Ueq
I2 0.50970 (2) 0.38032 (2) 0.54995 (3) 0.03743 (13)
Br1 0.20310 (2) 0.36852 (2) 0.79545 (6) 0.04263 (16)
O1 0.42867 (17) 0.28117 (13) 0.6518 (5) 0.0521 (10)
O2 0.4022 (2) 0.46968 (14) 0.5807 (4) 0.0516 (10)
C1 0.4078 (2) 0.23013 (19) 0.6969 (5) 0.0390 (11)
C2 0.4186 (3) 0.2159 (2) 0.8207 (6) 0.0451 (12)
H2 0.436625 0.241798 0.878620 0.054*
C3 0.4026 (3) 0.1630 (2) 0.8605 (5) 0.0444 (11)
H3 0.409091 0.153271 0.946883 0.053*
C4 0.3775 (2) 0.12372 (18) 0.7770 (5) 0.0362 (10)
C5 0.3671 (3) 0.1399 (2) 0.6533 (6) 0.0471 (12)
H5 0.349124 0.114281 0.594556 0.057*
C6 0.3822 (3) 0.1927 (2) 0.6127 (5) 0.0476 (12)
H6 0.374835 0.202922 0.526877 0.057*
C7 0.3881 (2) 0.32541 (18) 0.6644 (5) 0.0321 (9)
C8 0.3258 (2) 0.32291 (18) 0.7179 (5) 0.0338 (9)
H8 0.308552 0.289175 0.749135 0.041*
C9 0.2896 (2) 0.37085 (19) 0.7246 (5) 0.0305 (9)
C10 0.3128 (2) 0.42135 (18) 0.6824 (5) 0.0359 (10)
H10 0.286638 0.453686 0.688911 0.043*
C11 0.3753 (2) 0.42277 (17) 0.6305 (4) 0.0328 (9)
C12 0.4137 (2) 0.37551 (17) 0.6210 (4) 0.0274 (8)
C13 0.3791 (2) 0.52088 (17) 0.6206 (5) 0.0389 (11)
C14 0.3973 (3) 0.5415 (2) 0.7376 (5) 0.0447 (12)
H14 0.419811 0.518943 0.797050 0.054*
C15 0.3823 (3) 0.5955 (2) 0.7670 (5) 0.0406 (10)
H15 0.394804 0.609635 0.847497 0.049*
C16 0.3494 (2) 0.62999 (18) 0.6825 (5) 0.0323 (9)
C17 0.3436 (3) 0.5525 (2) 0.5367 (5) 0.0412 (11)
H17 0.329056 0.537369 0.458506 0.049*
C18 0.3294 (2) 0.6068 (2) 0.5674 (5) 0.0350 (9)
H18 0.305413 0.628668 0.508672 0.042*
C19 0.3081 (3) 0.7224 (2) 0.6032 (6) 0.0515 (13)
H19A 0.335418 0.717837 0.527187 0.077*
H19B 0.305312 0.761603 0.624747 0.077*
H19C 0.263743 0.708085 0.586750 0.077*
C20 0.3390 (2) 0.69103 (19) 0.7132 (5) 0.0372 (10)
C21 0.2936 (3) 0.6966 (2) 0.8303 (6) 0.0499 (13)
H21A 0.250017 0.681393 0.810526 0.075*
H21B 0.289108 0.735607 0.852762 0.075*
H21C 0.312821 0.676496 0.901816 0.075*
C22 0.4060 (3) 0.7173 (2) 0.7450 (7) 0.0600 (17)
H22A 0.424421 0.699751 0.820778 0.090*
H22B 0.399918 0.756753 0.761061 0.090*
H22C 0.436266 0.712300 0.673522 0.090*
C23 0.3050 (5) 0.0664 (3) 0.9154 (11) 0.116 (4)
H23A 0.314308 0.092769 0.983307 0.174*
H23B 0.298748 0.029645 0.951921 0.174*
H23C 0.264831 0.077463 0.870401 0.174*
C24 0.3619 (3) 0.0651 (2) 0.8241 (6) 0.0464 (12)
C25 0.4218 (4) 0.0415 (3) 0.8916 (10) 0.087 (3)
H25A 0.460115 0.043168 0.835063 0.130*
H25B 0.413092 0.003182 0.914916 0.130*
H25C 0.430731 0.063065 0.968277 0.130*
C26 0.3455 (7) 0.0272 (3) 0.7160 (10) 0.134 (5)
H26A 0.305718 0.040351 0.672819 0.202*
H26B 0.337722 −0.010012 0.748881 0.202*
H26C 0.382367 0.026362 0.655893 0.202*

1 Source of materials

A mixture of 5-bromo-1,3-difluoro-2-iodobenzene (319 mg, 1 mmol), 4-(tert-butyl)phenol (375 mg, 2.5 mmol) and potassium carbonate (414 mg, 3 mmol) in 50 mL dry DMA under argon was stirred at 170 °C for 36 h. The resulting mixture was cooled to room temperature and then poured into a large amount of water for extraction with dichloromethane. The combined organic phase was dried over anhydrous sodium sulfate and then concentrated under reduced pressure. The crude product was purified by column chromatography on silica gel using petroleum as eluent to afford a white solid. The crystals of the title compound were grown by slow evaporation of its ethanol/dichloromethane solution at room temperature.

2 Experimental details

Their Uiso values were set to 1.2Ueq of all C(H) groups. Their Uiso values were set to 1.5Ueq of all C(H,H,H) groups. A aromatic/amide H refined with riding coordinates [3, 4]. Idealised methyl refined as rotating group.

3 Comment

Organic light-emitting diodes (OLEDs) are a promising technology for flexible and lightweight display devices [5]. Boron-based multi-resonant thermally activated delayed fluorescence (MR-TADF) emitters showed simultaneously high photoluminescence quantum yields and narrowband emission [6]. In addition, the emission wavelength can be easily adjusted by combining various donors with boron-containing acceptors. Therefore, among the various OLED candidates, organoboron-based emitters consisting of oxygen- and nitrogen-bridged cyclized boron acceptors have shown excellent performance in TADF-OLEDs [7].

Oxygen-bridged cyclized boron luminescent materials are widely used in blue OLEDs [8]. Herein, an important precursor with 4-(tert-butyl)phenol is synthesized, which can be reacted in one step to the tBuDOBNA [6]. In the molecular structure the C–Br bond length is 1.907(4) Å, while the C–I bond was slightly longer, at 2.088(4) Å. The length of the C–O bond is 1.360(5) and 1.394(5) Å [9]. The angles of C7–O1–C1 and C11–O2–C13 were measured at 119.1(4)° and 119.6(4)° respectively. All the bond lengths and angles of this molecule are in the expected ranges [9].


Corresponding author: Zhenlong Tu, Shenzhen Institute of Information Technology, 518172 Longxiang Avenue No. 2188, Longgang District, Shenzhen, P.R. China, E-mail:

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work is supported by the China Postdoctoral Science Foundation (2022M710020), the Science and Technology Project of Shenzhen City (JSGG202108021-54213040).

  3. Competing interests: The authors declare no conflicts of interest regarding this article.

References

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Received: 2023-11-17
Accepted: 2023-12-30
Published Online: 2024-01-05
Published in Print: 2024-04-25

© 2023 the author(s), published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution 4.0 International License.

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