Startseite The crystal structure of 2,8-diethyl-1,3,7,9-tetramethyl-4λ4,5λ4-spiro[dipyrrolo[1,2-c:2′,1′-f][1,3,2]diazaborinine-5,2′-naphtho[1,8-de][1,3,2]dioxaborinine], C25H29BN2O2
Artikel Open Access

The crystal structure of 2,8-diethyl-1,3,7,9-tetramethyl-4λ4,5λ4-spiro[dipyrrolo[1,2-c:2′,1′-f][1,3,2]diazaborinine-5,2′-naphtho[1,8-de][1,3,2]dioxaborinine], C25H29BN2O2

  • Ghaferah H. Al-Hazmi , Moamen S. Refat , Rabia Usman ORCID logo EMAIL logo und Arshad Khan ORCID logo EMAIL logo
Veröffentlicht/Copyright: 15. April 2024

Abstract

C25H29BN2O2, monoclinic, P21/c (no. 14), a = 13.1591(3) Å, b = 13.9362(3) Å, c = 13.0463(3) Å, β = 112.066(3)°, V = 2217.29(10) Å3, Z = 4, R gt (F) = 0.0419, wR ref (F 2) = 0.1068, T = 150 K.

CCDC no.: 2327663

The molecular structure is shown in the figure. Table 1 contains crystallographic data and Table 2 contains the list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal: Orange plate
Size: 0.25 × 0.10 × 0.03 mm
Wavelength: Cu Kα radiation (1.54184 Å)
μ: 0.62 mm−1
Diffractometer, scan mode: Xcalibur, ω
θ max, completeness: 67.0°, >99 %
N (hkl)measured, N(hkl)unique, R int: 16,043, 3934, 0.049
Criterion for I obs, N(hkl)gt: I obs > 2σ(I obs), 3072
N(param)refined: 295
Programs: CrysAlisPRO [1], SHELX [2, 3], Olex2 [4]
Table 2:

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

Atom x y z U iso*/U eq
O1 0.69989 (9) 0.75873 (8) 0.73529 (9) 0.0257 (3)
O2 0.77601 (9) 0.64034 (8) 0.64421 (9) 0.0253 (3)
N1 0.57667 (12) 0.66166 (10) 0.58072 (11) 0.0249 (3)
N2 0.67866 (11) 0.58649 (10) 0.76366 (10) 0.0237 (3)
C1 0.39908 (15) 0.62750 (13) 0.47120 (14) 0.0296 (4)
C2 0.44236 (15) 0.68773 (13) 0.41289 (13) 0.0295 (4)
C3 0.55175 (15) 0.70865 (12) 0.48360 (13) 0.0270 (4)
C5 0.75690 (14) 0.56155 (12) 0.86238 (13) 0.0258 (4)
C6 0.71211 (15) 0.49882 (12) 0.91904 (13) 0.0266 (4)
C7 0.60240 (15) 0.48438 (12) 0.85172 (13) 0.0267 (4)
C8 0.48791 (15) 0.55132 (12) 0.66185 (13) 0.0266 (4)
H8 0.4249 0.5183 0.6573 0.032*
C9 0.58250 (14) 0.53958 (12) 0.75518 (13) 0.0241 (4)
C10 0.48394 (14) 0.61025 (12) 0.57546 (13) 0.0252 (4)
C11 0.28610 (16) 0.58647 (15) 0.43325 (16) 0.0400 (5)
H11A 0.2348 0.6364 0.4304 0.060*
H11B 0.2834 0.5376 0.4840 0.060*
H11C 0.2675 0.5591 0.3610 0.060*
C12 0.38770 (17) 0.72286 (14) 0.29629 (14) 0.0346 (4)
H12A 0.3351 0.6749 0.2541 0.042*
H12B 0.4427 0.7288 0.2638 0.042*
C13 0.32894 (17) 0.81814 (15) 0.28483 (15) 0.0362 (4)
H13A 0.2980 0.8362 0.2082 0.054*
H13B 0.3801 0.8664 0.3260 0.054*
H13C 0.2715 0.8123 0.3130 0.054*
C14 0.62972 (16) 0.77319 (15) 0.45994 (15) 0.0351 (4)
H14A 0.6608 0.8173 0.5202 0.053*
H14B 0.5917 0.8084 0.3932 0.053*
H14C 0.6871 0.7358 0.4511 0.053*
C15 0.87127 (15) 0.59836 (14) 0.90161 (14) 0.0342 (4)
H15A 0.9039 0.5809 0.8497 0.051*
H15B 0.9130 0.5709 0.9725 0.051*
H15C 0.8707 0.6670 0.9080 0.051*
C16 0.77281 (16) 0.45765 (14) 1.03199 (14) 0.0331 (4)
H16A 0.7220 0.4499 1.0694 0.040*
H16B 0.8289 0.5028 1.0745 0.040*
C17 0.82638 (18) 0.36173 (16) 1.03006 (16) 0.0423 (5)
H17A 0.8758 0.3684 0.9920 0.063*
H17B 0.7709 0.3153 0.9925 0.063*
H17C 0.8663 0.3407 1.1045 0.063*
C18 0.51999 (17) 0.42477 (14) 0.87660 (15) 0.0350 (4)
H18A 0.5562 0.3713 0.9221 0.053*
H18B 0.4659 0.4016 0.8087 0.053*
H18C 0.4850 0.4631 0.9150 0.053*
C19 0.78943 (14) 0.81475 (12) 0.75594 (12) 0.0232 (4)
C20 0.80022 (15) 0.89873 (13) 0.81444 (14) 0.0300 (4)
H20 0.7467 0.9167 0.8412 0.036*
C21 0.89228 (16) 0.95722 (13) 0.83352 (14) 0.0338 (4)
H21 0.8991 1.0137 0.8736 0.041*
C22 0.97233 (15) 0.93346 (13) 0.79479 (14) 0.0315 (4)
H22 1.0323 0.9737 0.8084 0.038*
C23 1.04169 (15) 0.81915 (14) 0.68874 (14) 0.0305 (4)
H23 1.1028 0.8573 0.6995 0.037*
C24 1.02733 (14) 0.73583 (13) 0.62931 (14) 0.0296 (4)
H24 1.0785 0.7189 0.5990 0.035*
C25 0.93744 (14) 0.67560 (13) 0.61308 (13) 0.0264 (4)
H25 0.9294 0.6192 0.5727 0.032*
C26 0.86106 (13) 0.70019 (12) 0.65709 (12) 0.0230 (4)
C27 0.87160 (13) 0.78725 (12) 0.71607 (12) 0.0231 (4)
C28 0.96384 (14) 0.84759 (12) 0.73402 (13) 0.0265 (4)
B4 0.68816 (16) 0.66499 (14) 0.68173 (15) 0.0228 (4)

1 Source of materials

In a Schlenk tube 2,6-diethyl-3,5-dimethyl-4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (50 mg, 0.16 mmol) and TMSOTf (0.11 mL, 0.57 mmol) were dissolved in toluene (5 mL) and the mixture was heated under reflux for 30 min. The solution was cooled to room temperature, and 1,8-dihydroxynaphthalene (132 mg, 0.82 mmol) was added followed by diisopropylethylamine (0.10 mL, 0.57 mmol). The reaction mixture was stirred for 2 h at room temperature, the solvent was removed under reduced pressure, and the crude product was purified by column chromatography to give the title compound as a red solid (0.046 g, 66 %). A single crystal suitable for single crystal diffraction analysis was obtained by slow evaporation from a mixture of chloroform and hexane (1:3).

2 Experimental details

The structure of the as title compound was solved using SHELXT [1] and refined by SHELXL program [2] through the Olex2 interface [3]. All hydrogen atoms were positioned at calculated coordinates and refined isotropically.

3 Comment

Boron complexes with dipyrromethene ligands, known as BODIPY complexes, have gained significant attention for their diverse applications in fluorescent switches, biomolecule markers, organic solar cells, chemosensors, laser dyes, photodynamic therapy, and fluorescence surface labeling [5], [6], [7], [8]. Furthermore, new preparation techniques including cross-coupling reactions, halogenation, and nucleophilic aromatic substitution for the functionalization of BODIPY complexes to facilitate binding to a biological target and alter its optical properties have grown rapidly [9, 10]. Overcoming the challenges in BODIPY chemistry involves developing compounds with improved emission and absorption profiles, as well as the discovery of dyes with novel properties [1115].

There is one molecule in the asymmeric unit with all parameters to be found in the expected ranges [16]. Single structural analysis revealed N–B–N and O2–B4–O1 bond angles of 105.34° and 114.64°, respectively. The B–O bond lengths do not show a large variation (B4–O1 = 1.461 Å; and B4–O2 = 1.456 Å). Overall, C–H⋯π and π–π stacking interactions were playing major role in assembling the complex lattice.


Corresponding author: Rabia Usman, School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan 643000, China; and Arshad Khan, Nanomedicine Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh 11426, Kingdom of Saudi Arabia, E-mail: (A. Khan)

  1. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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

  3. Research funding: Princess Nourah bint Abdulrahman University Researchers Supporting Project number (PNURSP2024R76), Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.

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Received: 2024-02-03
Accepted: 2024-04-02
Published Online: 2024-04-15
Published in Print: 2024-06-25

© 2024 the author(s), published by De Gruyter, Berlin/Boston

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

Artikel in diesem Heft

  1. Frontmatter
  2. New Crystal Structures
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  72. The crystal structure of 1-(1-adamantan-1-yl)ethyl-3-(3-methoxyphenyl)thiourea, C20H28N2OS
  73. The crystal structure of N,N′-carbonylbis(2,6-difluorobenzamide), C15H8F4N2O3
Heruntergeladen am 30.9.2025 von https://www.degruyterbrill.com/document/doi/10.1515/ncrs-2024-0053/html
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