Home Halogen bonds in the crystal structure of 4,3′:5′,4″-terpyridine — 1,3-diiodotetrafluorobenzene (1/1), C21H11F4I2N3
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Halogen bonds in the crystal structure of 4,3′:5′,4″-terpyridine — 1,3-diiodotetrafluorobenzene (1/1), C21H11F4I2N3

  • Weizhou Wang ORCID logo EMAIL logo
Published/Copyright: January 14, 2022
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Zeitschrift für Kristallographie - New Crystal Structures
From the journal Zeitschrift für Kristallographie - New Crystal Structures Volume 237 Issue 1

Abstract

C21H11F4I2N3, orthorhombic, Pnma (no. 62), a = 11.0042(4) Å, b = 20.6209(5) Å, c = 9.2371(3) Å, V = 2096.05(11) Å3, Z = 4, R gt (F) = 0.0316, wR ref (F 2) = 0.0556, T = 293(2) K.

CCDC no.: 2125796

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: Colorless block
Size: 0.21 × 0.20 × 0.17 mm
Wavelength: Mo Kα radiation (0.71073 Å)
μ: 3.05 mm−1
Diffractometer, scan mode: SuperNova, ω
θ max, completeness: 28.5°, >99%
N(hkl)measured, N(hkl)unique, R int: 22,257, 2503, 0.037
Criterion for I obs, N(hkl)gt: I obs > 2 σ(I obs), 1994
N(param)refined: 145
Programs: CrysAlisPRO [1], Olex2 [2], SHELX [3, 4]
Table 2:

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

Atom x y z U iso*/U eq
I1 0.78735 (2) 0.39662 (2) 0.40387 (3) 0.05317 (9)
F1 0.7038 (2) 0.2500 0.3986 (3) 0.0510 (7)
F2 1.07476 (18) 0.36309 (10) 0.4135 (2) 0.0690 (6)
F3 1.1960 (2) 0.2500 0.4129 (3) 0.0676 (8)
C9 0.8271 (4) 0.2500 0.4033 (5) 0.0419 (10)
C10 0.8855 (3) 0.30881 (15) 0.4064 (3) 0.0419 (7)
C11 1.0108 (3) 0.30739 (16) 0.4100 (3) 0.0481 (8)
C12 1.0736 (4) 0.2500 0.4106 (5) 0.0494 (12)
N1 0.6466 (3) 0.51087 (14) 0.3922 (4) 0.0630 (8)
N2 0.2858 (4) 0.7500 0.2470 (5) 0.0577 (11)
C1 0.6649 (3) 0.56103 (17) 0.4795 (4) 0.0619 (10)
H1 0.7206 0.5564 0.5545 0.074*
C2 0.6057 (3) 0.61982 (16) 0.4653 (4) 0.0533 (9)
H2 0.6222 0.6533 0.5298 0.064*
C3 0.5224 (3) 0.62892 (15) 0.3557 (4) 0.0427 (7)
C4 0.5012 (3) 0.57571 (17) 0.2666 (4) 0.0583 (9)
H4 0.4445 0.5784 0.1921 0.070*
C5 0.5646 (4) 0.51908 (18) 0.2892 (5) 0.0727 (12)
H5 0.5487 0.4843 0.2281 0.087*
C6 0.5184 (4) 0.7500 0.3608 (5) 0.0421 (11)
H6 0.5960 0.7500 0.4008 0.051*
C7 0.4610 (3) 0.69167 (15) 0.3312 (3) 0.0413 (7)
C8 0.3444 (3) 0.69504 (17) 0.2751 (4) 0.0506 (8)
H8 0.3045 0.6563 0.2557 0.061*

Source of material

The 4,3′:5′,4″-terpyridine was purchased from Jinan Heng Hua Technology Co. Ltd. (Shandong, China), and 1,3-diiodotetrafluorobenzene was purchased from J&K Scientific Ltd. (Beijing, China). Both of them were used without further purification. The halogen bond acceptor 4,3′:5′,4″-terpyridine (2.33 mg, 0.01 mmol) and the halogen bond donor 1,3-diiodotetrafluorobenzene (4.02 mg, 0.01 mmol) were dissolved in 15 mL of trichloromethane with gentle stirring at room temperature. The undissolved materials were removed by filtration. The filtrate was set aside for crystallization by slow evaporation at room temperature conditions. After about three days, colorless block crystals of title compound were obtained.

Experimental details

The structure was solved with the SHELXT [3] program using Intrinsic Phasing and refined with the SHELXL [4] refinement package. H atoms were placed in calculated positions and were included in the refinement in the riding model approximation, with U iso(H) set to 1.2U eq(C).

Comment

In recent years, the theoretical and experimental studies of the halogen bonds have attracted considerable attention [5], [6], [7], [8], [9]. The halogen bonds in the crystal structure of the cocrystal formed between 4,3′:5′,4″-terpyridine and 1,4-diiodotetrafluorobenzene have been reported in a previous study [10]. In this work, the cocrystal formed between 4,3′:5′,4″-terpyridine and 1,3-diiodotetrafluorobenzene was synthesized and the halogen bonds in its crystal structure was investigated.

All bond lengths and angles in the title crystal structure are in the normal ranges. The 4,3′:5′,4″-terpyridine molecules and 1,3-diiodotetrafluorobenzene molecules are linked by the halogen bonds with d(I1⃛N1) = 2.822 Å and <(C10–I1⃛N1) = 177.05° to form a zigzag chain. Similar to the case in the crystal structure of the cocrystal formed between 4,3′:5′,4″-terpyridine and 1,4-diiodotetrafluorobenzene [10], the electron-rich N2 atom does not form any halogen bond. In the crystal structure of the cocrystal formed between 4,3′:5′,4″-terpyridine and 1,4-diiodotetrafluorobenzene, the zigzag chains are linked mainly through the π⃛π stacking interactions to form a 3D structure [10]. In the title structure, there are no π⃛π stacking interactions found; the zigzag chains are linked together through the C8–H8⃛N1 and C6–H6⃛N2 hydrogen bonds to form the 3D structure. According to the dispersion-corrected density functional theory calculations at the PBE0-D3/def2-TZVPP level of theory [11, 12], the binding energy of one strong C6–H6⃛N2 hydrogen bond and two weak C8–H8⃛N1 hydrogen bonds formed between two 4,3′:5′,4″-terpyridine molecules is 7.77 kcal/mol, and the binding energy of one C10–I1⃛N1 halogen bond formed between 4,3′:5′,4″-terpyridine and 1,3-diiodotetrafluorobenzene is 8.00 kcal/mol. The details and reliability of the PBE0-D3/def2-TZVPP calculations for the study of the noncovalent interactions can be found elsewhere [13], [14], [15]. Evidently, the strength of one C–I⃛N halogen bond is much stronger than the strength of one C–H⃛N hydrogen bond.

In conclusion, the 4,3′:5′,4″-terpyridine molecule only forms two strong halogen bonds with two 1,3-diiodotetrafluorobenzene molecules. The third electron-rich nitrogen atom of 4,3′:5′,4″-terpyridine forms a hydrogen bond with one C–H bond of another 4,3′:5′,4″-terpyridine molecule.

Corresponding author: Weizhou Wang, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China, E-mail:

Funding source: National Science Foundation of China

Award Identifier / Grant number: 21773104

Funding source: Program for Science & Technology Innovation Talents in Universities of Henan Province

Award Identifier / Grant number: 13HASTIT015

Acknowledgment

Computer time was provided by the National Supercomputing Center in Shenzhen.

  1. Author contributions: The author has accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work was supported by the National Science Foundation of China (Grant No. 21773104) and the Program for Science & Technology Innovation Talents in Universities of Henan Province (Grant No. 13HASTIT015).

  3. Conflict of interest statement: The author declares no conflicts of interest regarding this article.

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Received: 2021-10-29
Accepted: 2021-12-02
Published Online: 2022-01-14
Published in Print: 2022-02-23

© 2021 Weizhou Wang, published by De Gruyter, Berlin/Boston

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

Articles in the same Issue

  1. Frontmatter
  2. New Crystal Structures
  3. Crystal structure of (E)-7-hydroxy-2-((6-methoxypyridin-3-yl)methylene)-3, 4-dihydronaphthalen-1(2H)-one, C17H15NO3
  4. Crystal structure of (E)-7-methoxy-2-((2-methoxypyridin-3-yl)methylene)-3,4-dihydronaphthalen-1 (2H)-one, C18H17NO3
  5. The crystal structure of N 6,N 6′-di(pyridin-2-yl)-[2,2′-bipyridine]-6,6′-diamine, C20H16N6
  6. The crystal structure of {N 1,N 2-bis[2,4-dimethyl-6-(4-(tert-butyl)phenyl)(phenyl)methyl]acenaphthylene-1,2-diimino-κ2 N, N′}-dibromido-nickel(II) – dichloromethane(1/2), C64H64Br2Cl4N2Ni
  7. Synthesis and crystal structure of nonacarbonyltris[(2-thia-1,3,5-triaza-7-phosphatricylco[3.3.1.1]decane-κ1 P)-2,2-dioxide]triruthenium(0) – acetonitrile (7/6), C25.71H32.57N9.86O15P3S3Ru3
  8. A new polymorph of 1-(4-nitrophenyl)-1H-benzimidazole (C13H9N3O2)
  9. The crystal structure of 2,2′-((1E,1′E)-(naphthalene-2,3 diylbis(azanylylidene)) bis(methanylylidene))bis(4-methylphenol), C26H22N2O2
  10. The crystal structure of bis(μ2-iodido)-bis(η6-benzene)-bis(iodido)-diosmium(II), C12H12I4Os2
  11. Redetermination of the crystal structure of bis{hydridotris(3,5-dimethylpyrazol-1-yl-κN 3)borato}copper(II), C30H44B2CuN12
  12. Crystal structure of (E)-3-((4-(tert-butyl)phenyl)thio)-4-hydroxypent-3-en-2-one, C15H20O2S
  13. Crystal structure of 2,2′-(p-tolylazanediyl)bis(1-phenylethan-1-one), C23H21NO2
  14. Redetermination of the crystal structure of the crystal sponge the poly[tetrakis(μ3-2,4,6-tris(pyridin-4-yl)-1,3,5-triazine)-dodecaiodidohexazinc(II) nitrobenzene solvate], C72H48I12N24Zn6⋅10(C6H5NO2)
  15. Crystal structure of (4′E)-6′-(diethylamino)-2-[(E)-[(6-methylpyridin-2-yl)methylidene]amino]-4′-{2-[(2E)-1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene]ethylidene}-1′,2,2′,3,3′,4′-hexahydrospiro[isoindole-1,9′-xanthene]-3-one, C44H45N5O2
  16. Crystal structure of (E)-7-fluoro-2-(3-fluorobenzylidene)-3,4-dihydronaphthalen-1(2H)-one, C17H12F2O1
  17. Crystal structure of tetrabutylammonium sulfanilate – 1-(diaminomethylene)thiourea (1/2)
  18. Crystal structure of [2,2′-{azanediyl)bis[(propane-3,1-diyl)(azanylylidene)methylylidene]} bis(3,5-dichlorophenolato)-κ2O,O′]-isothiocyanato-κN-iron(III), C21H19Cl4FeN4O2S
  19. Crystal structure of (4-chlorophenyl)(4-hydroxyphenyl)methanone, C13H9ClO2
  20. Crystal structure of 6,6′-((pentane-1,3-diylbis(azaneylylidene))bis(methaneylylidene))bis(2,4-dibromolphenolato-κ4 N,N′,O,O′)copper(II),) C19H16Br4CuN2O2
  21. Chlorido-(2,2′-(ethane-bis(5-methoxyphenolato))-κ4 N,N′,O,O′)manganese(III) monohydrate, C19H18Cl2CuN2O2
  22. Crystal structure of 2,6-di-tert-butyl-4-(4-methoxybenzylidene)cyclohexa-2,5-dien-1-one, C22H28O2
  23. Crystal structure of [6,6′-(((2,2-dimethylpropane-1,3-diyl)bis(azanylylidene))bis(methanylylidene))bis(2-chlorophenolato)-κ4N,N′,O,O′]copper(II)
  24. Crystal structure of 2-chloro-3-((thiophen-2-ylmethyl)amino)naphthalene-1,4-dione, C30H20O4N2Cl2S2
  25. Crystal structure of bis{hydridotris(3-trifluoromethyl-5-methylpyrazolyl-1-yl)borato-κN 3}manganese(II), C30H26B2F18MnN12
  26. Crystal structure of 1-(2-methylphenyl)-2-(2-methylbenzo[b]thienyl)-3,3,4,4,5,5-hexafluorocyclopent-ene, C21H14F6S
  27. Crystal structure of 2-(3-((carbamimidoylthio)methyl)benzyl)isothiouronium hexafluorophosphate monohydrate, C10H17F6N4OPS2
  28. Crystal structure of 4,5-diiodo-1,3-dimesityl-1H-1,2,3-triazol-3-ium chloride – chloroform (1/1), C21H23Cl4I2N3
  29. Crystal structure of azido-k1 N-{6,6′-((((methylazanediyl)bis(propane-3,1-diyl))bis(azanylylidene))bis(methanylylidene))bis(2,4-dibromophenolato)k5 N,N′,N″,O,O′}cobalt(III)-methanol (1/1)), C21H23Br4CoN6O3
  30. The crystal structure of 2-(4-((carbamimidoylthio)methyl)benzyl)isothiouronium hexafluorophosphate monohydrate, C10H17F6N4OPS2
  31. Crystal structure of 1,1′-(methane-1,1-diyl)bis(3-methyl-1H-imidazol-3-ium) bis(hexafluoridophosphate), C9H14F12N4P2
  32. Crystal structure of (4′E)-6′-(diethylamino)-2-[(E)-[(pyren-1-yl)methylidene]amino]-4′-{2-[(2E)-1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene]ethylidene}-1′,2,2′,3,3′,4′-hexahydrospiro[isoindole-1,9′-xanthene]-3-one, C54H48N4O2
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  34. Cones with a three-fold symmetry constructed from three hydrogen bonded theophyllinium cations that coat [FeCl4]− anions in the crystal structure of tris(theophyllinium) bis(tetrachloridoferrate(III)) chloride trihydrate, C21H33Cl9Fe2N12O9
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  37. The crystal structure of 4-phenyl-4-[2-(pyridine-4-carbonyl)hydrazinylidene]butanoic acid, C16H15N3O3
  38. The crystal structure of 6-amino-5-carboxypyridin-1-ium pentaiodide monohydrate C6H9I5N2O3
  39. Crystal structure of bis(μ3-oxido)-bis(μ2-2-formylbenzoato-k2O:O′)-bis(2-(dimethoxymethyl)-benzoato-κO)-oktakismethyl-tetratin(IV)
  40. Crystal structure of 2-((E)-(((E)-2-hydroxy-4-methylbenzylidene) hydrazineylidene)methyl)-4-methylphenol, C16H16N2O2
  41. Crystal structure of (E)-amino(2-((5-methylfuran-2-yl)methylene)hydrazinyl) methaniminium nitrate monohydrate, C14H26N10O10
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  50. The crystal structure of C19H20O8
  51. The crystal structure of KNa3Te8O18·5H2O exhibiting a ∞2[Te4O9]2− layer
  52. Erratum
  53. Erratum to: Crystal structure of (Z)-3-(6-bromo-1H-indol-3-yl)-1,3-diphenylprop-2-en-1-one, C23H16BrNO
https://doi.org/10.1515/ncrs-2021-0424
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Articles in the same Issue

  1. Frontmatter
  2. New Crystal Structures
  3. Crystal structure of (E)-7-hydroxy-2-((6-methoxypyridin-3-yl)methylene)-3, 4-dihydronaphthalen-1(2H)-one, C17H15NO3
  4. Crystal structure of (E)-7-methoxy-2-((2-methoxypyridin-3-yl)methylene)-3,4-dihydronaphthalen-1 (2H)-one, C18H17NO3
  5. The crystal structure of N 6,N 6′-di(pyridin-2-yl)-[2,2′-bipyridine]-6,6′-diamine, C20H16N6
  6. The crystal structure of {N 1,N 2-bis[2,4-dimethyl-6-(4-(tert-butyl)phenyl)(phenyl)methyl]acenaphthylene-1,2-diimino-κ2 N, N′}-dibromido-nickel(II) – dichloromethane(1/2), C64H64Br2Cl4N2Ni
  7. Synthesis and crystal structure of nonacarbonyltris[(2-thia-1,3,5-triaza-7-phosphatricylco[3.3.1.1]decane-κ1 P)-2,2-dioxide]triruthenium(0) – acetonitrile (7/6), C25.71H32.57N9.86O15P3S3Ru3
  8. A new polymorph of 1-(4-nitrophenyl)-1H-benzimidazole (C13H9N3O2)
  9. The crystal structure of 2,2′-((1E,1′E)-(naphthalene-2,3 diylbis(azanylylidene)) bis(methanylylidene))bis(4-methylphenol), C26H22N2O2
  10. The crystal structure of bis(μ2-iodido)-bis(η6-benzene)-bis(iodido)-diosmium(II), C12H12I4Os2
  11. Redetermination of the crystal structure of bis{hydridotris(3,5-dimethylpyrazol-1-yl-κN 3)borato}copper(II), C30H44B2CuN12
  12. Crystal structure of (E)-3-((4-(tert-butyl)phenyl)thio)-4-hydroxypent-3-en-2-one, C15H20O2S
  13. Crystal structure of 2,2′-(p-tolylazanediyl)bis(1-phenylethan-1-one), C23H21NO2
  14. Redetermination of the crystal structure of the crystal sponge the poly[tetrakis(μ3-2,4,6-tris(pyridin-4-yl)-1,3,5-triazine)-dodecaiodidohexazinc(II) nitrobenzene solvate], C72H48I12N24Zn6⋅10(C6H5NO2)
  15. Crystal structure of (4′E)-6′-(diethylamino)-2-[(E)-[(6-methylpyridin-2-yl)methylidene]amino]-4′-{2-[(2E)-1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene]ethylidene}-1′,2,2′,3,3′,4′-hexahydrospiro[isoindole-1,9′-xanthene]-3-one, C44H45N5O2
  16. Crystal structure of (E)-7-fluoro-2-(3-fluorobenzylidene)-3,4-dihydronaphthalen-1(2H)-one, C17H12F2O1
  17. Crystal structure of tetrabutylammonium sulfanilate – 1-(diaminomethylene)thiourea (1/2)
  18. Crystal structure of [2,2′-{azanediyl)bis[(propane-3,1-diyl)(azanylylidene)methylylidene]} bis(3,5-dichlorophenolato)-κ2O,O′]-isothiocyanato-κN-iron(III), C21H19Cl4FeN4O2S
  19. Crystal structure of (4-chlorophenyl)(4-hydroxyphenyl)methanone, C13H9ClO2
  20. Crystal structure of 6,6′-((pentane-1,3-diylbis(azaneylylidene))bis(methaneylylidene))bis(2,4-dibromolphenolato-κ4 N,N′,O,O′)copper(II),) C19H16Br4CuN2O2
  21. Chlorido-(2,2′-(ethane-bis(5-methoxyphenolato))-κ4 N,N′,O,O′)manganese(III) monohydrate, C19H18Cl2CuN2O2
  22. Crystal structure of 2,6-di-tert-butyl-4-(4-methoxybenzylidene)cyclohexa-2,5-dien-1-one, C22H28O2
  23. Crystal structure of [6,6′-(((2,2-dimethylpropane-1,3-diyl)bis(azanylylidene))bis(methanylylidene))bis(2-chlorophenolato)-κ4N,N′,O,O′]copper(II)
  24. Crystal structure of 2-chloro-3-((thiophen-2-ylmethyl)amino)naphthalene-1,4-dione, C30H20O4N2Cl2S2
  25. Crystal structure of bis{hydridotris(3-trifluoromethyl-5-methylpyrazolyl-1-yl)borato-κN 3}manganese(II), C30H26B2F18MnN12
  26. Crystal structure of 1-(2-methylphenyl)-2-(2-methylbenzo[b]thienyl)-3,3,4,4,5,5-hexafluorocyclopent-ene, C21H14F6S
  27. Crystal structure of 2-(3-((carbamimidoylthio)methyl)benzyl)isothiouronium hexafluorophosphate monohydrate, C10H17F6N4OPS2
  28. Crystal structure of 4,5-diiodo-1,3-dimesityl-1H-1,2,3-triazol-3-ium chloride – chloroform (1/1), C21H23Cl4I2N3
  29. Crystal structure of azido-k1 N-{6,6′-((((methylazanediyl)bis(propane-3,1-diyl))bis(azanylylidene))bis(methanylylidene))bis(2,4-dibromophenolato)k5 N,N′,N″,O,O′}cobalt(III)-methanol (1/1)), C21H23Br4CoN6O3
  30. The crystal structure of 2-(4-((carbamimidoylthio)methyl)benzyl)isothiouronium hexafluorophosphate monohydrate, C10H17F6N4OPS2
  31. Crystal structure of 1,1′-(methane-1,1-diyl)bis(3-methyl-1H-imidazol-3-ium) bis(hexafluoridophosphate), C9H14F12N4P2
  32. Crystal structure of (4′E)-6′-(diethylamino)-2-[(E)-[(pyren-1-yl)methylidene]amino]-4′-{2-[(2E)-1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene]ethylidene}-1′,2,2′,3,3′,4′-hexahydrospiro[isoindole-1,9′-xanthene]-3-one, C54H48N4O2
  33. Crystal structure of poly[bis(μ2-2,6-bis(1-imidazoly)pyridine-κ2 N,N′)-bis(thiocyanato-κ1 N)copper(II)] dithiocyanate, C24H18CuN12S2
  34. Cones with a three-fold symmetry constructed from three hydrogen bonded theophyllinium cations that coat [FeCl4]− anions in the crystal structure of tris(theophyllinium) bis(tetrachloridoferrate(III)) chloride trihydrate, C21H33Cl9Fe2N12O9
  35. Crystal structure of 14-O-[(4-(4-hydroxypiperidine-1-yl)-6-methylpyrimidine-2-yl)thioacetyl]-mutilin monohydrate, C32H49N3O6S
  36. The crystal structure of (E)-3-chloro-2-(2-(4-methylbenzylidene)hydrazinyl)pyridine, C13H12ClN3
  37. The crystal structure of 4-phenyl-4-[2-(pyridine-4-carbonyl)hydrazinylidene]butanoic acid, C16H15N3O3
  38. The crystal structure of 6-amino-5-carboxypyridin-1-ium pentaiodide monohydrate C6H9I5N2O3
  39. Crystal structure of bis(μ3-oxido)-bis(μ2-2-formylbenzoato-k2O:O′)-bis(2-(dimethoxymethyl)-benzoato-κO)-oktakismethyl-tetratin(IV)
  40. Crystal structure of 2-((E)-(((E)-2-hydroxy-4-methylbenzylidene) hydrazineylidene)methyl)-4-methylphenol, C16H16N2O2
  41. Crystal structure of (E)-amino(2-((5-methylfuran-2-yl)methylene)hydrazinyl) methaniminium nitrate monohydrate, C14H26N10O10
  42. The crystal structure of N′-(2-chloro-6-hydroxybenzylidene)thiophene-2-carbohydrazide monohydrate, C12H11ClN2O3S
  43. Crystal structure of catena-poly[(μ2-1,1′-(biphenyl-4,4′-diyl)bis(1H-imidazol)-κ2N:N′)-bis(4-bromobenzoate-κ1O)zinc(II)], C64H44Br4N8O8Zn2
  44. The crystal structure of catena-poly[(1-(4-carboxybenzyl)pyridin-1-ium-4-carboxylato-κ1O)-(μ2-oxalato-κ4 O:O′:O″:O‴)dioxidouranium(VI)], C16H11NO10U
  45. Crystal structure of 3-allyl-4-(2-bromoethyl)-5-(4-methoxyphenyl)-2-phenylfuran, C22H21BrO2
  46. Halogen bonds in the crystal structure of 4,3′:5′,4″-terpyridine — 1,3-diiodotetrafluorobenzene (1/1), C21H11F4I2N3
  47. Crystal structure of 2-(1H-indol-3-yl)ethan-1-aminium 2-(4-acetylphenoxy)acetate, C20H22N2O4
  48. Chalcogen bonds in the crystal structure of 4,7-dibromo-2,1,3-benzoselenadiazole, C6H2Br2N2Se
  49. The crystal structure of 1,4-bis((1H-benzimidazol-2-yl)methyl)-piperazine-2,5-dione dihydrate, C20H22N6O4
  50. The crystal structure of C19H20O8
  51. The crystal structure of KNa3Te8O18·5H2O exhibiting a ∞2[Te4O9]2− layer
  52. Erratum
  53. Erratum to: Crystal structure of (Z)-3-(6-bromo-1H-indol-3-yl)-1,3-diphenylprop-2-en-1-one, C23H16BrNO
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