Home Physical Sciences The crystal structure of the co-crystal isonicotinamide – 2-(nitrophenyl)methanol (1/1), C6H6N2O·C7H7NO3
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The crystal structure of the co-crystal isonicotinamide – 2-(nitrophenyl)methanol (1/1), C6H6N2O·C7H7NO3

  • Lindelwa N. Maziya ORCID logo , Hlobsile Kgomo ORCID logo and Mark G. Smith ORCID logo EMAIL logo
Published/Copyright: October 23, 2025
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Zeitschrift für Kristallographie - New Crystal Structures
From the journal Zeitschrift für Kristallographie - New Crystal Structures Volume 240 Issue 6

Abstract

C6H6N2O·C7H7NO3, monoclinic, P21/n (no. 14), a = 3.7957(3) Å, b = 7.4395(5) Å, c = 43.878(3) Å, β = 91.181(3)°, V = 1238.77(16) Å3, Z = 4, R gt (F) = 0.0514, wRref(F2) = 0.1138, T = 173 K.

CCDC no.: 2451500
Keywords: crystal structure; co-crystal; isonicotinamide; 2-(nitrophenyl)methanol

The molecular structure is shown in the figure. Table 1 contains the crystallographic data. The list of the atoms including atomic coordinates and displacement parameters can be found in the cif-file attached to this article.

Table 1:

Data collection and handling.

Crystal: Colorless needle
Size: 0.76 × 0.15 × 0.12 mm
Wavelength: Mo Kα radiation (0.71073 Å)
μ: 0.11 mm−1
Diffractometer, scan mode: Bruker APEX3, φ and ω scans
θmax, completeness: 27.6°, 100 %
N(hkl)measured, N(hkl)unique, Rint: 25907, 2837, 0.101
Criterion for Iobs, N(hkl)gt: Iobs > 2 σ(Iobs), 2107
N(param)refined: 193
Programs: Bruker, 1 SHELX, 2 , 3 WinGX, 4 , 5 Platon 6

1 Discussion

Isonicotinamide, a pyridine-based compound with an amide group at the gamma-position, holds pharmaceutical significance due to its anti-tubercular, antipyretic, and antibacterial activities. 7 It readily forms co-crystals because of its ability to act as both a hydrogen bond donor and acceptor, and the robust heterosynthon formed between the pyridine nitrogen heteroatom and carboxylic acids and alcohols is well known in crystal engineering. 8 It is therefore often used in the formation of hydrogen-bonded networks with a wide range of pharmaceutical and functional molecules. 9 The 2-(nitrophenyl)methanol has the possibility to be a good co-former in co-crystallization since it is able to engage in both hydrogen bonding through the hydroxyl group and π–π stacking interactions via the aromatic ring, which can significantly influence crystal packing and stability. In this study, we report the synthesis and characterization of a co-crystal formed between isonicotinamide and 2-(nitrophenyl)methanol.

The asymmetric unit contains one molecule of isonicotinamide and one molecule of 2-(nitrophenyl)methanol, which crystallizes in the monoclinic P21/n space group. There is a single hydrogen bond between the two molecules formed between the pyridine nitrogen acceptor of isonicotinamide and the hydroxyl hydrogen donor of 2-(nitrophenyl)methanol, thus forming a discrete hydrogen bond via N1⋯H2a–O2.

With regard to packing, each isonicotinamide molecule is hydrogen bonded to an adjacent isonicotinamide via O5⋯H1A–N1 homosynthons, with a centre of inversion between the two molecules. The packing is further stabilized by π–π stacking interactions via the aromatic rings of 2-(nitrophenyl)methanol with a distance of 3.796 Å between the rings.

2 Source of materials

Analytical grade chemicals were purchased and used without further purification. The general one pot method for the synthesis of co-crystals described by Smith et al. 10 was followed for the synthesis of the co-crystal isonicotinamide·2-(nitrophenyl)methanol. The reaction followed a 1:1 mol ratio between isonicotinamide and 2-(nitrophenyl)methanol, by weighing 0.0800 g isonicotinamide (0.655 mmol) and 0.100 g 2-(nitrophenyl)methanol (0.655 mmol) in the same reaction vial. The mixture was subsequently dissolved in 3 mL AP-grade methanol. The mixture was stirred to ensure complete dissolution and placed at room temperature with the lid slightly opened to allow slow evaporation. Clear colourless needle crystals were afforded after 2 days.

3 Experimental details

C-bound hydrogen atoms were located in the difference map then positioned geometrically and were allowed to ride on their respective parent atoms with thermal displacement parameters 1.2 times of the parent C atom. The coordinates and isotropic displacement parameters of the N-bound and O-bound H atoms involved in hydrogen bonding interactions were allowed to refine freely. Diagrams and publication material were generated using ORTEP-3, 4 WinGX 5 and PLATON. 6

Corresponding author: Mark G. Smith, Department of Chemistry, University of South Africa, Unisa Science Campus, 28 Pioneer Avenue, Florida, Roodepoort Gauteng, South Africa, E-mail:

Funding source: National Research Foundation (South Africa)

Award Identifier / Grant number: CSUR23042597072

Funding source: University of South Africa (Dr H Kgomo)

Funding source: UNISA College of Science, Engineering and Technology bursary (Ms LN Maziya)

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

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

  3. Research funding: This work was supported by the National Research Foundation (NRF) “Competitive Support for Unrated Researchers” grant Number CSUR23042597072 (Dr MG Smith), the University of South Africa (Dr H Kgomo) and the UNISA College of Science, Engineering and Technology bursary (Ms LN Maziya).

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Received: 2025-07-17
Accepted: 2025-10-02
Published Online: 2025-10-23
Published in Print: 2025-12-17

© 2025 the author(s), 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. The crystal structure of (1Z, 2Z)-3-phenyl-2-propenal 2-(4-bromo-2-fluorophenyl)hydrazone, C15H12BrFN2
  4. Refinement of crystal structure of 2-(2,3-dihydro-3-oxo-1 H -inden-1-ylidene)-1 H -indene-1,3(2 H )-dione C18H10O3
  5. The crystal structure of 3-(1-fluoro-2-(naphthalen-2-yl)-2-oxoethyl)-2-methoxy-3,4-dihydroisoquinolin-1(2H)-one, C22H18FNO3
  6. Crystal structure of the dinuclear copper(II) complex bis(μ2-2,2′ -{[1,3-phenylenebis-(methylene)]bis(oxy)}dibenzoaot-κ4O,O′:O′′,O′′′)-bis(dimethylformamide-κ1O)dicopper(II), C50H44Cu2N2O14
  7. Crystal structure of poly[triaqua-(μ9-biphenyl-3,3′,5,5′-tetracarboxylic-κ8 O,O:O,O′: O,O″:O,O‴)samarium(III)sodium(I)], C16H12NaSmO11
  8. The crystal structure of 5-benzyl-1-(4-fluorobenzyl)-4-((4-fluorobenzyl)oxy)-1,5-dihydro-2H-pyrrol-2-one, C25H21F2NO2
  9. The crystal structure of diammonium 2,5-dihydroxyterephthalate, C8H12N2O6
  10. Crystal structure of (E)-4-(4-(1H-1,2,4-triazol-1-yl)benzylidene)-6,8-dimethoxy-3,4-dihydrobenzo[b]oxepin-5(2H)-one, C21H19N3O4
  11. Crystal structure of poly[oktakis(μ2-oxido-κ2O:O)-tetrakis(oxido-κ1O)-bis(μ2-1,1′-[1,4-phenylenebis(methylene)]di(1H-imidazole-κ2N:N′))-tetravanadium(V)-dizinc(II)] monohydrate, C28H30Zn2N8O13V4
  12. Crystal structure of acotiamide hydrochloride dimethylacetamide solvate (1/1), C25H40ClN5O6S
  13. Crystal structure of catena-poly[monoaqua (u2-(3-(3,5-dicarboxyphenyl)pyridine-2,6-dicarboxylic-k4O:O′:O″:N)zinc(II))] monohydrate, C15H11NO10Zn
  14. Crystal structure of dichlorido{2,6-bis(3,5-diisopropyl-N-pyrazolyl)pyridine}zinc(II), C23H33Cl2N5Zn
  15. Crystal structure of nitrato-κ2O,O′-[hydridotris(3,5-diethylpyrazol-1-yl)borato-κ3N,N′,N″]copper(II), C21H34BCuN7O3
  16. Crystal structure of 2,7-bis(3,5-diethyl-1H-pyrazol-4-yl)-benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetrone, C28H26N6O4
  17. Crystal structure of 2-(4-chlorophenyl)benzothiazole, C13H8ClNS
  18. Synthesis and crystal structure (3R,4′S)-4′-(3,5-dibromophenyl)-1′-methyl-2H-dispiro [benzofuran-3,3′-pyrrolidine-2′,2″-indene]-1″,2,3″-trione, C26H17Br2NO4
  19. Crystal structure of bis(((3a,7a-dihydro-1H-benzo[d][1,2,3]triazol-1-yl)methyl) triphenylphosphonium) tetrachloridomanganate(II), C50H42Cl4MnN6P2
  20. The crystal structure of 4,9-bis(4-chlorophenyl)-1,6-bis(2-cyanobenzyl)-2,4a,5,6,7,7a-hexahydro-1H-2,7,5-(epiprop[2]ene[1,1,3]triyl)pyrrolo[3,4-b]pyridine-3,10-dicarbonitrile, C40H26Cl2N6
  21. The crystal structure of poly((μ2-3-(3-nitro-4-carboxylphenyl)benzoate-κ3O, O′:O″)-μ2-1,4-bis(1-imidazolyl)benzene-κ2N:N′-cadmium(II)), C26H17N5O6Cd
  22. The crystal structure of 6-hydroxy-5H-pyrrolo[3,4-b]pyridine-5,7(6H)-dione monohydrate, C7H6N2O4
  23. Crystal structure of 4-((cyclohexylsulfonyl)methyl)-1,2,3,4-tetrahydrobenzo [4,5]imidazo[1,2-a]pyridine, C18H24N2O2S
  24. Crystal structure of 4,7-diphenyl-1,10-phenanthroline-κ2N,N′)-bis(2,4-di(fluorine)-1-phenylpyridine-κ2C,N)-iridium(III) hexafluorophosphate–dichloromethane (1/1), C47H30Cl2F10IrN4P
  25. Crystal structure of (4-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl)boronic acid, C19H15BN2O2
  26. The crystal structure of (E)-(2-((pyridin-2-ylmethylene)amino)phenyl)arsonic acid, C12H11AsN2O3
  27. The crystal structure of N(benzyl(phenyl)carbomothioyl)benzamide, C21H18N2OS
  28. The crystal structure of bis(2-picolinium) hexachlorostannate dichloromethane monosolvate, C13H18Cl8N2Sn
  29. Crystal structure of poly[tetraaqua-bis(μ4-3–1-(carboxylatomethyl)-1H-1,2,4-triazole-3-carboxylato)-κ4O:O′,O″,N)zinc(II)], C5H7N3O6Zn
  30. The crystal structure of the co-crystal isonicotinamide – 2-(nitrophenyl)methanol (1/1), C6H6N2O·C7H7NO3
  31. The crystal structure of 4-(3-carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)piperazin-1-ium 2-fluorobenzoate hydrate, C23H25F2N3O6
  32. Crystal structure of [diaqua-{1H-benzo[d]imidazol-3-ium-5,6-dicarboxylato-κ2O,O′}magnesium(II)] C18H14MgN4O10
  33. Crystal structure of (3-(dimethoxymethyl)-5-methoxy-1H-indol-1-yl) (2-iodo-5-methoxyphenyl)methanone, C20H20INO5
  34. The crystal structure of 3,7,11-trimethylbenzo[5,6][1,4]thiazino[2,3,4-kl]phenothiazine 5,5,9,9-tetraoxide, C21H17NO4S2
  35. Crystal structure of tris(piperazine-1,4-diium)bis(2-hydroxy-1,2,3-propane-tricarboxylate) pentahydrate, C24H56N6O19
  36. Crystal structure of 2-chloro-5-((5-isopropyl-2-methylphenoxy)methyl)pyridine, C16H18ClNO
  37. Crystal structure of (E)-4-(4-(1H-pyrrol-1-yl)benzylidene)-6,8-dimethoxy-3,4-dihydrobenzo[(b)]oxepin-5(2H)-one, C23H21NO4
  38. Crystal structure of (E)-N′-(3,4-dichlorobenzylidene)-3,4,5-trimethoxybenzohydrazide, C17H16Cl2N2O4
  39. The crystal structure of 2-(2-hydroxyphenyl)-3-(pyridin-2-yl)-2,3- dihydroquinazolin-4(1H)-one, C19H15N3O2
  40. Crystal structure of 5-hydroxy-2-(4-hydroxyphenyl)-7-methoxy-8-methylchroman-4-one, C17H16O5
  41. Crystal structure of bis[(3,4-dimethoxybenzyl)triphenylphosphonium]di-μ2-bromido-dibromidodicopper(I)
  42. Crystal structure of bis [(1,3-dioxolan-2-ylmethyl)triphenylphosphonium] tetrabromidodicopper(I), C22H22Br2CuO2P
  43. Crystal structure of [1-(4-carboxyphenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid], C12H8N2O5
  44. The crystal structure of one-dimensional cooridnation polymer bis(thiocyanato)-bis((1E,2E)-1,2-bis(1-(pyridin-3-yl)ethylidene)-hydrazine κ2N:N)iron(II), (C30H28N10S2Fe)n
  45. Crystal structure of ((4-acetamidophenyl)sulfonyl)-l-alanine, C11H14N2O5S
  46. Crystal structure of [(1-naphthalen-1-yl-methyl)triphenylphosphonium] dichloridocopper(I), [C29H24P]+[CuCl2]−
  47. RbTm3S5: the first rubidium lanthanoid(III) sulfide with CsEr3Se5-type crystal structure
  48. Crystal structure of 2,2′-((ethane-1,2-diylbis(methylammoniumdiyl))bis(methylene))bis(pyridin-1-ium) diiodido-tris(μ2-iodido-κ2I:I)dicopper(II) chloride dihydrate, C16H30Cu2I6N4O2
  49. The crystal structure of 4-(trifluoromethyl)pyridine-2-carboxylic acid, C7H4F3NO2
  50. The crystal structure of (E)-2-ethoxy-1-methoxy-4-(2-(methylsulfonyl)vinyl)benzene, C12H16O4S
  51. Crystal structure of potassium 1H,1H,2H,2H-perfluorooctanesulfonate, C8H4O3F13SK
  52. Crystal structure of 4-(4-(quinolin-8-yloxy)-1,2,5-thiadiazol-3-yl)morpholine, C15H14O2N4S
  53. The crystal structure of 1,4-bis(bromomethyl)-2,5-dimethylbenzene, C10H12Br2
  54. The crystal structure of imidazo[4,5-e][1,3]diazepine-4,6,8-triamine methanol solvate, C7H11N7O
  55. The crystal structure of chlorido-bis(1,10-phenantroline-κ2N,N′)-(2-formylphenoxyacetato-κ2O,O) lead(II), C33H23N4O4ClPb
  56. Crystal structure of pyridinium tetrakis(1,1,1-trifluoro-2,4-pentadionato-κ2O,O′)yttrium(III) C20F12H16YO8C5H6N
https://doi.org/10.1515/ncrs-2025-0320
Keywords for this article
crystal structure; co-crystal; isonicotinamide; 2-(nitrophenyl)methanol
Creative Commons
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Articles in the same Issue

  1. Frontmatter
  2. New Crystal Structures
  3. The crystal structure of (1Z, 2Z)-3-phenyl-2-propenal 2-(4-bromo-2-fluorophenyl)hydrazone, C15H12BrFN2
  4. Refinement of crystal structure of 2-(2,3-dihydro-3-oxo-1 H -inden-1-ylidene)-1 H -indene-1,3(2 H )-dione C18H10O3
  5. The crystal structure of 3-(1-fluoro-2-(naphthalen-2-yl)-2-oxoethyl)-2-methoxy-3,4-dihydroisoquinolin-1(2H)-one, C22H18FNO3
  6. Crystal structure of the dinuclear copper(II) complex bis(μ2-2,2′ -{[1,3-phenylenebis-(methylene)]bis(oxy)}dibenzoaot-κ4O,O′:O′′,O′′′)-bis(dimethylformamide-κ1O)dicopper(II), C50H44Cu2N2O14
  7. Crystal structure of poly[triaqua-(μ9-biphenyl-3,3′,5,5′-tetracarboxylic-κ8 O,O:O,O′: O,O″:O,O‴)samarium(III)sodium(I)], C16H12NaSmO11
  8. The crystal structure of 5-benzyl-1-(4-fluorobenzyl)-4-((4-fluorobenzyl)oxy)-1,5-dihydro-2H-pyrrol-2-one, C25H21F2NO2
  9. The crystal structure of diammonium 2,5-dihydroxyterephthalate, C8H12N2O6
  10. Crystal structure of (E)-4-(4-(1H-1,2,4-triazol-1-yl)benzylidene)-6,8-dimethoxy-3,4-dihydrobenzo[b]oxepin-5(2H)-one, C21H19N3O4
  11. Crystal structure of poly[oktakis(μ2-oxido-κ2O:O)-tetrakis(oxido-κ1O)-bis(μ2-1,1′-[1,4-phenylenebis(methylene)]di(1H-imidazole-κ2N:N′))-tetravanadium(V)-dizinc(II)] monohydrate, C28H30Zn2N8O13V4
  12. Crystal structure of acotiamide hydrochloride dimethylacetamide solvate (1/1), C25H40ClN5O6S
  13. Crystal structure of catena-poly[monoaqua (u2-(3-(3,5-dicarboxyphenyl)pyridine-2,6-dicarboxylic-k4O:O′:O″:N)zinc(II))] monohydrate, C15H11NO10Zn
  14. Crystal structure of dichlorido{2,6-bis(3,5-diisopropyl-N-pyrazolyl)pyridine}zinc(II), C23H33Cl2N5Zn
  15. Crystal structure of nitrato-κ2O,O′-[hydridotris(3,5-diethylpyrazol-1-yl)borato-κ3N,N′,N″]copper(II), C21H34BCuN7O3
  16. Crystal structure of 2,7-bis(3,5-diethyl-1H-pyrazol-4-yl)-benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetrone, C28H26N6O4
  17. Crystal structure of 2-(4-chlorophenyl)benzothiazole, C13H8ClNS
  18. Synthesis and crystal structure (3R,4′S)-4′-(3,5-dibromophenyl)-1′-methyl-2H-dispiro [benzofuran-3,3′-pyrrolidine-2′,2″-indene]-1″,2,3″-trione, C26H17Br2NO4
  19. Crystal structure of bis(((3a,7a-dihydro-1H-benzo[d][1,2,3]triazol-1-yl)methyl) triphenylphosphonium) tetrachloridomanganate(II), C50H42Cl4MnN6P2
  20. The crystal structure of 4,9-bis(4-chlorophenyl)-1,6-bis(2-cyanobenzyl)-2,4a,5,6,7,7a-hexahydro-1H-2,7,5-(epiprop[2]ene[1,1,3]triyl)pyrrolo[3,4-b]pyridine-3,10-dicarbonitrile, C40H26Cl2N6
  21. The crystal structure of poly((μ2-3-(3-nitro-4-carboxylphenyl)benzoate-κ3O, O′:O″)-μ2-1,4-bis(1-imidazolyl)benzene-κ2N:N′-cadmium(II)), C26H17N5O6Cd
  22. The crystal structure of 6-hydroxy-5H-pyrrolo[3,4-b]pyridine-5,7(6H)-dione monohydrate, C7H6N2O4
  23. Crystal structure of 4-((cyclohexylsulfonyl)methyl)-1,2,3,4-tetrahydrobenzo [4,5]imidazo[1,2-a]pyridine, C18H24N2O2S
  24. Crystal structure of 4,7-diphenyl-1,10-phenanthroline-κ2N,N′)-bis(2,4-di(fluorine)-1-phenylpyridine-κ2C,N)-iridium(III) hexafluorophosphate–dichloromethane (1/1), C47H30Cl2F10IrN4P
  25. Crystal structure of (4-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl)boronic acid, C19H15BN2O2
  26. The crystal structure of (E)-(2-((pyridin-2-ylmethylene)amino)phenyl)arsonic acid, C12H11AsN2O3
  27. The crystal structure of N(benzyl(phenyl)carbomothioyl)benzamide, C21H18N2OS
  28. The crystal structure of bis(2-picolinium) hexachlorostannate dichloromethane monosolvate, C13H18Cl8N2Sn
  29. Crystal structure of poly[tetraaqua-bis(μ4-3–1-(carboxylatomethyl)-1H-1,2,4-triazole-3-carboxylato)-κ4O:O′,O″,N)zinc(II)], C5H7N3O6Zn
  30. The crystal structure of the co-crystal isonicotinamide – 2-(nitrophenyl)methanol (1/1), C6H6N2O·C7H7NO3
  31. The crystal structure of 4-(3-carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)piperazin-1-ium 2-fluorobenzoate hydrate, C23H25F2N3O6
  32. Crystal structure of [diaqua-{1H-benzo[d]imidazol-3-ium-5,6-dicarboxylato-κ2O,O′}magnesium(II)] C18H14MgN4O10
  33. Crystal structure of (3-(dimethoxymethyl)-5-methoxy-1H-indol-1-yl) (2-iodo-5-methoxyphenyl)methanone, C20H20INO5
  34. The crystal structure of 3,7,11-trimethylbenzo[5,6][1,4]thiazino[2,3,4-kl]phenothiazine 5,5,9,9-tetraoxide, C21H17NO4S2
  35. Crystal structure of tris(piperazine-1,4-diium)bis(2-hydroxy-1,2,3-propane-tricarboxylate) pentahydrate, C24H56N6O19
  36. Crystal structure of 2-chloro-5-((5-isopropyl-2-methylphenoxy)methyl)pyridine, C16H18ClNO
  37. Crystal structure of (E)-4-(4-(1H-pyrrol-1-yl)benzylidene)-6,8-dimethoxy-3,4-dihydrobenzo[(b)]oxepin-5(2H)-one, C23H21NO4
  38. Crystal structure of (E)-N′-(3,4-dichlorobenzylidene)-3,4,5-trimethoxybenzohydrazide, C17H16Cl2N2O4
  39. The crystal structure of 2-(2-hydroxyphenyl)-3-(pyridin-2-yl)-2,3- dihydroquinazolin-4(1H)-one, C19H15N3O2
  40. Crystal structure of 5-hydroxy-2-(4-hydroxyphenyl)-7-methoxy-8-methylchroman-4-one, C17H16O5
  41. Crystal structure of bis[(3,4-dimethoxybenzyl)triphenylphosphonium]di-μ2-bromido-dibromidodicopper(I)
  42. Crystal structure of bis [(1,3-dioxolan-2-ylmethyl)triphenylphosphonium] tetrabromidodicopper(I), C22H22Br2CuO2P
  43. Crystal structure of [1-(4-carboxyphenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid], C12H8N2O5
  44. The crystal structure of one-dimensional cooridnation polymer bis(thiocyanato)-bis((1E,2E)-1,2-bis(1-(pyridin-3-yl)ethylidene)-hydrazine κ2N:N)iron(II), (C30H28N10S2Fe)n
  45. Crystal structure of ((4-acetamidophenyl)sulfonyl)-l-alanine, C11H14N2O5S
  46. Crystal structure of [(1-naphthalen-1-yl-methyl)triphenylphosphonium] dichloridocopper(I), [C29H24P]+[CuCl2]−
  47. RbTm3S5: the first rubidium lanthanoid(III) sulfide with CsEr3Se5-type crystal structure
  48. Crystal structure of 2,2′-((ethane-1,2-diylbis(methylammoniumdiyl))bis(methylene))bis(pyridin-1-ium) diiodido-tris(μ2-iodido-κ2I:I)dicopper(II) chloride dihydrate, C16H30Cu2I6N4O2
  49. The crystal structure of 4-(trifluoromethyl)pyridine-2-carboxylic acid, C7H4F3NO2
  50. The crystal structure of (E)-2-ethoxy-1-methoxy-4-(2-(methylsulfonyl)vinyl)benzene, C12H16O4S
  51. Crystal structure of potassium 1H,1H,2H,2H-perfluorooctanesulfonate, C8H4O3F13SK
  52. Crystal structure of 4-(4-(quinolin-8-yloxy)-1,2,5-thiadiazol-3-yl)morpholine, C15H14O2N4S
  53. The crystal structure of 1,4-bis(bromomethyl)-2,5-dimethylbenzene, C10H12Br2
  54. The crystal structure of imidazo[4,5-e][1,3]diazepine-4,6,8-triamine methanol solvate, C7H11N7O
  55. The crystal structure of chlorido-bis(1,10-phenantroline-κ2N,N′)-(2-formylphenoxyacetato-κ2O,O) lead(II), C33H23N4O4ClPb
  56. Crystal structure of pyridinium tetrakis(1,1,1-trifluoro-2,4-pentadionato-κ2O,O′)yttrium(III) C20F12H16YO8C5H6N
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