Home Physical Sciences The crystal structure of 2,3,5-triphenyl-2,3-dihydro-1H-tetrazol-1-ium 2,3-dioxoindoline-5-sulfonate, C27H19N5O5S
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The crystal structure of 2,3,5-triphenyl-2,3-dihydro-1H-tetrazol-1-ium 2,3-dioxoindoline-5-sulfonate, C27H19N5O5S

  • Hazem A. Ghabbour EMAIL logo , Obaid S. AlRuqi and Gamal A. E. Mostafa
Published/Copyright: June 20, 2017
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Zeitschrift für Kristallographie - New Crystal Structures
From the journal Zeitschrift für Kristallographie - New Crystal Structures Volume 232 Issue 4

Abstract

C27H19N5O5S, monoclinic, P21/c (no. 14), a = 14.2789(4) Å, b = 27.3722(9) Å, c = 13.0126(4) Å, β = 101.805(2)°, V = 4978.3(3) Å3, Z = 8, Rgt(F) = 0.0809, wRref(F2) = 0.1705.

CCDC no.:: 1516169

The asymmetric unit of the title crystal structure is shown in the figure. Tables 1 and 2 contain details on crystal structure and measurement conditions and a list of the atoms including atomic coordinates and displacement parameters.

Table 1

Data collection and handling.

Crystal:Yellow plate
Size:0.42 × 0.27 × 0.05 mm
Wavelength:Cu Kα radiation (1.54178 Å)
μ:15.7 cm−1
Diffractometer, scan mode:Bruker APEX II, φ and ω-scans
2θmax, completeness:130°, >99%
N(hkl)measured, N(hkl)unique, Rint:34603, 8430, 0.150
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 4123
N(param)refined:694
Programs:Bruker programs [1], SHELX [2]
Table 2

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

AtomxyzUiso*/Ueq
S1A0.72403(10)0.63979(5)0.10174(10)0.0400(4)
O1A0.7423(3)0.91167(15)0.2142(3)0.0820(15)
O2A0.7212(3)0.84905(14)0.0247(3)0.0680(13)
O3A0.7808(3)0.60616(12)0.1744(3)0.0637(12)
O4A0.6236(2)0.62950(13)0.0814(3)0.0709(13)
O5A0.7628(3)0.64615(13)0.0077(3)0.0709(13)
N1A0.7634(4)0.8367(2)0.2956(4)0.0548(15)
C1A0.7459(4)0.8674(2)0.2126(5)0.0569(17)
C2A0.7306(4)0.8340(2)0.1140(5)0.0519(16)
C3A0.7358(3)0.78436(18)0.1547(4)0.0360(13)
C4A0.7250(3)0.73977(19)0.1049(4)0.0386(13)
H4AA0.70930.73780.03050.046*
C5A0.7377(3)0.69776(18)0.1655(4)0.0338(12)
C6A0.7587(3)0.7017(2)0.2754(4)0.0434(14)
H6AA0.76620.67270.31650.052*
C7A0.7688(4)0.7461(2)0.3251(4)0.0477(15)
H7AA0.78340.74810.39960.057*
C8A0.7571(4)0.7877(2)0.2643(4)0.0421(14)
S1B0.26535(9)0.63303(5)0.36060(10)0.0408(4)
O1B0.2461(3)0.90384(16)0.2446(3)0.0789(14)
O2B0.2513(4)0.84304(16)0.4317(3)0.111(2)
O3B0.2403(3)0.64122(13)0.4616(3)0.0686(13)
O4B0.3645(2)0.61948(13)0.3691(3)0.0655(12)
O5B0.1982(3)0.60057(12)0.2952(3)0.0582(12)
N1B0.2376(4)0.82885(19)0.1643(4)0.0524(14)
C1B0.2457(4)0.8596(2)0.2464(5)0.0584(18)
C2B0.2524(5)0.8270(2)0.3443(5)0.071(2)
C3B0.2513(4)0.7770(2)0.3058(4)0.0469(15)
C4B0.2602(4)0.73298(19)0.3560(4)0.0475(15)
H4BA0.27140.73150.43040.057*
C5B0.2529(3)0.69047(18)0.2971(4)0.0368(13)
C6B0.2407(4)0.6935(2)0.1884(4)0.0482(15)
H6BA0.23690.66440.14820.058*
C7B0.2340(4)0.7380(2)0.1381(4)0.0543(16)
H7BA0.22420.73960.06380.065*
C8B0.2417(4)0.7800(2)0.1963(4)0.0443(15)
N2A0.9981(3)0.62280(16)0.1345(3)0.0427(12)
N3A0.9912(3)0.58792(15)0.2021(3)0.0360(11)
N4A0.9817(3)0.60685(14)0.2931(3)0.0342(11)
N5A0.9798(3)0.65473(15)0.2870(3)0.0420(12)
C9A0.9909(4)0.6639(2)0.1885(4)0.0412(14)
C10A0.9915(4)0.7134(2)0.1471(5)0.0529(17)
C11A0.9918(6)0.7212(3)0.0435(6)0.122(4)
H11A0.99220.6946−0.00330.146*
C12A0.9917(7)0.7698(3)0.0080(7)0.161(6)
H12A0.99080.7762−0.06400.193*
C13A0.9928(6)0.8073(3)0.0748(9)0.112(4)
H13A0.99420.83980.04960.134*
C14A0.9920(5)0.7998(3)0.1754(8)0.111(4)
H14A0.99170.82670.22160.134*
C15A0.9915(4)0.7524(2)0.2119(6)0.079(2)
H15A0.99110.74700.28390.094*
C16A0.9920(4)0.53615(18)0.1769(4)0.0366(13)
C17A1.0743(4)0.51647(19)0.1558(4)0.0482(15)
H17A1.13100.53550.16340.058*
C18A1.0729(5)0.4683(2)0.1234(4)0.0616(18)
H18A1.12900.45350.10880.074*
C19A0.9900(5)0.4422(2)0.1124(4)0.0596(18)
H19A0.98900.40930.08850.072*
C20A0.9075(4)0.4619(2)0.1351(4)0.0596(17)
H20A0.85120.44270.12880.072*
C21A0.9083(4)0.51019(19)0.1671(4)0.0476(15)
H21A0.85230.52500.18180.057*
C22A0.9725(4)0.58201(17)0.3896(4)0.0315(12)
C23A1.0552(4)0.57081(17)0.4595(4)0.0416(14)
H23A1.11600.57390.44120.050*
C24A1.0463(4)0.55472(19)0.5589(4)0.0500(16)
H24A1.10200.54650.60950.060*
C25A0.9582(4)0.55075(18)0.5841(4)0.0506(16)
H25A0.95360.54040.65250.061*
C26A0.8756(4)0.56163(18)0.5113(4)0.0502(16)
H26A0.81460.55810.52910.060*
C27A0.8830(4)0.57781(18)0.4123(4)0.0447(15)
H27A0.82740.58580.36130.054*
N2B0.4456(3)0.65989(16)0.1571(3)0.0447(12)
N3B0.4672(3)0.61525(16)0.1903(4)0.0396(11)
N4B0.5299(3)0.61596(16)0.2819(3)0.0410(12)
N5B0.5500(3)0.66137(16)0.3116(3)0.0453(12)
C9B0.4977(4)0.68799(19)0.2329(5)0.0403(13)
C10B0.4979(4)0.7407(2)0.2295(5)0.0492(15)
C11B0.4706(4)0.7656(2)0.1350(5)0.0647(19)
H11B0.45230.74780.07150.078*
C12B0.4699(5)0.8161(3)0.1324(7)0.086(3)
H12B0.45080.83270.06750.103*
C13B0.4969(5)0.8420(3)0.2240(8)0.101(3)
H13B0.49620.87670.22220.121*
C14B0.5249(5)0.8180(3)0.3187(7)0.092(3)
H14B0.54450.83620.38160.110*
C15B0.5246(4)0.7674(2)0.3220(5)0.0639(18)
H15B0.54250.75090.38740.077*
C16B0.4240(4)0.5723(2)0.1359(5)0.0479(16)
C17B0.4251(4)0.5693(2)0.0307(5)0.0647(19)
H17B0.45350.5941−0.00400.078*
C18B0.3830(5)0.5286(3)−0.0224(6)0.094(3)
H18B0.38160.5253−0.09540.112*
C19B0.3432(5)0.4930(3)0.0295(7)0.093(3)
H19B0.31520.4651−0.00810.112*
C20B0.3430(4)0.4970(2)0.1347(6)0.076(2)
H20B0.31540.47210.16970.091*
C21B0.3837(4)0.5380(2)0.1891(5)0.0591(18)
H21B0.38350.54200.26160.071*
C22B0.5726(4)0.57337(19)0.3386(5)0.0435(15)
C23B0.6196(4)0.5408(2)0.2879(5)0.0625(18)
H23B0.62530.54590.21720.075*
C24B0.6594(5)0.4993(2)0.3441(7)0.088(3)
H24B0.69190.47540.31180.106*
C25B0.6504(5)0.4939(3)0.4463(7)0.091(3)
H25B0.67690.46570.48410.109*
C26B0.6049(5)0.5275(3)0.4954(6)0.079(2)
H26B0.60100.52280.56670.094*
C27B0.5641(4)0.5686(2)0.4419(5)0.0581(17)
H27B0.53180.59240.47490.070*
H1NA0.761(3)0.8442(17)0.357(4)0.033(16)*
H1NB0.231(4)0.837(2)0.092(5)0.10(3)*

Source of material

To a solution of sodium 2,3-dioxoindoline-5-sulfonate dihydrat (0.28521 g, 1 mmol) in water (10 ml) a solution of 2,3,5-triphenyl-2,3-dihydro-1H-tetrazol-1-ium chloride (0.3348 g, 1 mmol) in water (10 ml) was added. A yellow precipitate was formed and filtered off, washed with cold water. The precipitate was dried under vacuum to give the title compound. After recrystallization from acetonitrile the title compound was obtained in 80% yield.

Experimental details

Hydrogen atoms were placed in calculated positions and were included in the refinement using the riding model approximation, with Uiso(H) set to 1.2Ueq(C).

The ellipsoids of C11A and C12A are obviously too large (cf. the figure). This seems to be a consequence of the non-optimal data. Nevertheless, we are pretty sure that the C10A- C15A moiety is a phenyl group.

Discussion

Isatins (1H-indole-2,3-dione) are synthetically versatile substrates. They can be used for the synthesis of a large variety of heterocyclic compounds, such as indoles and quinolines [3], [4], [5]. Triphenyl tetrazolium chloride is often used as complexing agents and as electro-active pairing reagent for formation of many sensing materials [6, 7] .

The asymmetric unit of the title structure contains two cations and two anions (cf. the figure). The molecules are packed via intermolecular hydrogen bonds, N1A—H1NA…O5Ai, N1B—H1NB…O3Bii. The H…A distances are 2.01(5), 1.81(9) Å, respectively and the angles are 168(6), and 160(7), respectively. Symmetry codes: (i) x, −y + 3/2, z + 1/2; (ii) x, −y + 3/2, z − 1/2. Bond lengths and angels are all in the expected ranges. The phenyl moieties and the sulfonate groups are oriented to fill the needs of hydrogen bonding and sterical aspects.

Acknowledgement

The authors would like to extend their sincere appreciation to the Deanship of Scientific Research at King Saud University for its funding of this research through the Research Group Project No. RG-1436–024.

References

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3 Da Silva, J. F.; Garden, S. J.; Pinto, A. C.: The chemistry of isatins: a review from 1975 to 1999. J. Braz. Chem. Soc. 12 (2001) 273–324.10.1590/S0103-50532001000300002Search in Google Scholar

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Received: 2017-1-26
Accepted: 2017-6-5
Published Online: 2017-6-20
Published in Print: 2017-7-26

©2017 Hazem A. Ghabbour et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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  53. Important impurity of Flupirtine – a single crystal study on ethyl (6-amino-5-((ethoxycarbonyl)amino)pyridin-2-yl)(4-fluorobenzyl)carbamate, C18H21FN4O4
  54. Crystal structure of ethyl 3-(4-methoxyphenyl)-1-(2-(4-methoxyphenyl)-2-oxoethyl)-1H-pyrazole-5-carboxylate, C22H22N2O5
  55. Crystal structure of 2,3,9,10-tetramethoxy-5,6-dihydroisoquinolino[2,1-b]isoquinolin-7-ium 5-hydroxy-3-(4-hydroxyphenyl)-4-oxo-4H-chromen-7-olate methanol solvate, C37H35N1O10
  56. The crystal structure of the inner salt of 2-[(aminoiminomethyl)amino]ethylcarbamic acid [systematic name: (2-((diaminomethylene)ammonio)ethyl)carbamate], C4H10N4O2
  57. Crystal structure of (8-hydroxy-5-nitroquinolinium) perchlorate – 8-hydroxy-5-nitroquinoline (1/1), C18H13ClN4O10
  58. The crystal structure of (5-methyl-1,2,4-oxadiazol-3-yl)ferrocene, C13H12FeN2O
  59. Crystal structure of methyl 1-(2-(fluorosulfonyl)ethyl)-2-oxocyclopentanecarboxylate, C9H13FO5S
  60. Crystal structure of the triclinic modification of 1-methyl-4-nitroimidzole, C4H5N3O2
  61. Corrigendum
  62. Crystal structure of 4-bromo-2-(1H-pyrazol-3-yl)phenol, C9H7BrN2O
https://doi.org/10.1515/ncrs-2016-0366
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Articles in the same Issue

  1. Cover and Frontmatter
  2. Crystal structure of poly[diaqua-(μ2-4,4′-bipyridine-κ2N:N′)manganese(II)] bis(4-chlorobenzenesulfonate) – 4,4′-bipyridine – water (1/1/2) C42H40Cl2MnN6O10S2
  3. The crystal structure of 1,2-bis[2-methyl-5-(3-cyanophenyl)-3-thienyl]-3,3,4,4,5,5-hexafluoro-cyclopent-1-ene, C29H16F6N2S2
  4. Crystal structure of the first characterized polymeric copper and sodium complex diaqua-(tris-acetato-κO,O′)(μ2-acetato-κO′′)dinatrium copper(II) monohydrate, C8H18CuNa2O11
  5. The crystal structure of the Schiff base (E)-2,6-diisopropyl-N-(pyridin-3-yl-methylene)aniline, C18H22N2
  6. Crystal structure of methyl 2,7,7-trimethyl-4-(4-nitrophenyl)-5-oxo-1,4,5,6,7,8-hexahydro-quinoline-3-carboxylate, C20H22N2O5
  7. Crystal structure of bis(1,3-bis(diphenylphosphino)propane-κ2P,P′)silver(I) trifluorosulfonate–methanol (1:0.5), [Ag(C27H26P2)]SO3CF3⋅0.5CH3OH
  8. Crystal structure of μ-1,4-bis(diphenylphosphine)butane-2,9-dimethyl-1,10-phenanthroline-κ2N:N′-bis(cyano-κC)dicopper(I)]-water, C58H56Cu2N6O2P2
  9. Crystal structure of N2,N6-bis(1-hydrazinyl-2-methyl-1-oxopropan-2-yl) pyridine-2,6-dicarboxamide, C15H23N7O4
  10. Crystal structure of 1,3-dimethyl-2-phenyl-1H-perimidin-3-ium iodide, C19H17IN2
  11. Crystal structure of diaqua-(2,2′-(butane-1,4-diyl)-bis(5-carboxy-1H-imidazole-4-carboxylato)-κ4O,O′,N,N′)cadmium(II) monohydrate, C14H18O11N4Cd
  12. Crystal structure of ethyl (E)-3-(cyclopropylamino)-2-(2,4-dichloro-5-fluorobenzoyl) acrylate, C15H14Cl2FNO3
  13. Crystal structure of bis-(1-(4-chlorophenyl)-3-phenyl-4-thenoyl-1H-pyrazol-5-ol-κ2O,O′)-(N,N-dimethylformamide)zinc(II), C43H31Cl2N5O5S2Zn
  14. Crystal structure of tetrakis(μ3-2-(N-(2-hydroxyethyl)amino)ethoxo)-tetrachloro-tetra-cobalt(II) methanol solvate, C17H44Cl4Co4N4O9
  15. Crystal structure of 3-amino-1-(4-bromophenyl)-9-methoxy-1H-benzo[f]chromene-2-carbonitrile, C21H15BrN2O2
  16. Crystal structure of 2-amino-4-(4-isopropyl-phenyl)-3-cyano-5-oxo-4H,5H-pyrano[3,2-c]chromene, C22H18N2O3
  17. Crystal structure of 3-amino-8-methoxy-1-(4-methoxy phenyl)-1H-benzo[f]chromene-2-carbonitrile, C22H18N2O3
  18. Crystal structure of monoaqua-[6,6′-((1E,1′E)-(1,2-phenylene bis(azanylylidene))bis(methanylylidene))bis(4-bromo-2-nitrophenolato-κ4N,N′,O,O′)]zinc(II), C20H12Br2N4O7Zn
  19. Crystal structure of 11-(4-(dimethylamino)phenyl)-17-hydroxy-13-methyl-17-(prop-1-yn-1-yl)-1,2,6,7,8,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one – acetonitril (1/2), C33H41N3O2
  20. Crystal structure of tert-butyl (phenylsulfinyl)carbamate, C11H15NO3S
  21. Crystal structure of catena-poly{diaqua-bis(3-(1H-1,2,4-triazol-1-yl)benzoato-κ2O:N)copper(II)} monohydrate, C18H18CuN6O7
  22. Crystal structure of tetraaqua-bis(3-(4H-1,2,4-triazol-4-yl)benzoato-κN)cobalt(II), C18H20CoN6O8
  23. The crystal structure of 4-bromo-N-cyclopropyl-2,5-difluorobenzenesulfonamide, C9H8BrF2NO2S
  24. Crystal structure of ([3,3′-bipyridine]-6,6′-dicarboxylato-κ2O:O′)-bis(1,2-bis(4-pyridyl)ethane-κ2N:N′)disilver(I) dihydrate, C37H35Ag2N5O6
  25. The crystal structure of (4-(1H-1,2,4-triazol-1-yl)benzoato-κN)-[4-(1H-1,2,4-triazol-1-yl)benzoic acid-κN]silver(I), C18H13AgN6O4
  26. Crystal structure of 3-(4-methoxyphenyl)-1-(4-methylphenyl)prop-2-en-1-one, C17H16O2
  27. Crystal structure of bis(2-((E)-((4-((E)-1-(ethoxyimino)ethyl)phenyl)imino)methyl)-5-methoxyphenolato-κ2O,N)copper(II), C36H38CuN4O6
  28. Crystal structure of poly[1,2-bis(1,2,4-triazol-4-yl)ethane-κ2N:N′]silver(I) bromate monohydrate]silver(I), C6H10AgBrN6O4
  29. The crystal structure of 2,3,5-triphenyl-2,3-dihydro-1H-tetrazol-1-ium 2,3-dioxoindoline-5-sulfonate, C27H19N5O5S
  30. Crystal structure of 3-(2-amino-1,3-selenazol-4-yl)-2H-chromen-2-one – dimethylformamide (1/1), C15H15N3O3Se
  31. Crystal structure of diethyl 3,3′-(diazene-1,2-diyl)(E)-dibenzoate, C18H18N2O4
  32. Crystal structure of cis-bis((1H-benzimidazol-2-yl)methanol-κN,O)-bis(isothiocyanato-κN)nickel(II), C18H16N6NiO2S2
  33. Crystal structure of bis(2-(2′-hydroxy-5′-methoxyphenyl)-1H-benzimidazole)boron – tetrahydrofuran (1/1), C36H37N4O6B
  34. Crystal structure of poly[aqua-bis(nitrato-κ2O,O′)-(μ3-1,3-benzimidazol-3-ium-1,3-diacetato-κ4O,O′:O′′:O′′′)dysprosium(III)], C11H11DyN4O11
  35. Crystal structure of n-butyl-tris(dicyclo-hexylamido)hafnium(IV), C40H75HfN3
  36. Crystal structure of (E)-1-[1-(3-chloro-4-fluoro-phenyl)ethylidene]-2-(2,4-dinitrophenyl)hydrazine, C28H20Cl2F2N8O8
  37. The crystal structure of ethyl 4-((2-hydroxybenzyl)amino)benzoate, a Schiff base, C16H17NO3
  38. Crystal structure of 3-(2-(4-isobutylphenyl)propanoyl)-1-methylimidazolidine-2,4-dione, C17H22N2O3
  39. Crystal structure of poly[(μ3-2-(pyrazin-2-ylthio)acetato-κ3N:O:S)silver(I)], C6H5AgN2O2S
  40. Crystal structure of (E)-1-(3-((E)-((2-hydroxynaphthalen-1-yl)methylene)amino)phenyl)ethanone O-benzyl oxime, C26H22N2O2
  41. Crystal structure of (E)-2,3-dihydroxybenzaldehyde O-(2-((((E)-1-(2,5-dihydroxyphenyl)ethylidene)amino)oxy)ethyl) oxime monohydrate, C17H20N2O7
  42. Crystal structure of 4-(chloromethyl)-3-nitrobenzoic acid, C8H6ClNO4
  43. Crystal stucture of 4-((10H-phenothiazin-10-yl)methyl)-2,6-di-tert-butylphenol, C27H31NOS
  44. The crystal structure of ethyl 1-(4-nitrophenyl)-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate, C13H10F3N3O4
  45. Crystal structure of catena-poly[di-(μ3-oxido-κ3O:O:O)-tetraoxido-(μ2-5′-(pyrazin-2-yl)-1H,2′H-3,3′-bi(1,2,4-triazole)-κ2N:N′)dimolybdenum(VI)], C8H6Mo2N8O6
  46. Crystal structure of (3,6-dioxocyclohexa-1,4-diene-1,4-bis(olato)-κ4O,O′:O′′,O′′′)-bis(tris(2-pyridylmethyl)amine-κ4N,N′,N′′,N′′′))-dizinc(II) bis(hexafluorophosphate(V)), C42H38F12N8O4P2Zn2
  47. Crystal structure of catena-poly[hexakis(μ2-2-acetylphenolato-κ3O:O,O′)trimanganese(II)], C48H42Mn3O12
  48. The crystal structure of 2,2-difluoro-4-(trifluoromethyl)-2,5-dihydro-[1,3,2]dioxaborinino[5,4-c]chromen-3-ium-2-uide, C11H6BF5O3
  49. Crystal structure of methyl (E)-2-(4-(diethylamino)-2-hydroxybenzylidene)hydrazine-1-carboxylate, C13H19N3O3
  50. The crystal structure of tert-butyl 2,6-dihydropyrrolo[3,4-c]pyrazole-5(4H)-carboxylate, C10H15N3O2
  51. Crystal structure of 1,1-bis(η5-adamantylcyclopentadienyl)-3-phenyl-2-trimethylsilyl-2,3-dihydroisotitanazole, C42H55NSiTi
  52. Crystal structure of 2-(4-(2-(4-benzylpiperazin-1-yl)ethyl)benzyl)isoindoline-1,3-dione, C28H29N3O2
  53. Important impurity of Flupirtine – a single crystal study on ethyl (6-amino-5-((ethoxycarbonyl)amino)pyridin-2-yl)(4-fluorobenzyl)carbamate, C18H21FN4O4
  54. Crystal structure of ethyl 3-(4-methoxyphenyl)-1-(2-(4-methoxyphenyl)-2-oxoethyl)-1H-pyrazole-5-carboxylate, C22H22N2O5
  55. Crystal structure of 2,3,9,10-tetramethoxy-5,6-dihydroisoquinolino[2,1-b]isoquinolin-7-ium 5-hydroxy-3-(4-hydroxyphenyl)-4-oxo-4H-chromen-7-olate methanol solvate, C37H35N1O10
  56. The crystal structure of the inner salt of 2-[(aminoiminomethyl)amino]ethylcarbamic acid [systematic name: (2-((diaminomethylene)ammonio)ethyl)carbamate], C4H10N4O2
  57. Crystal structure of (8-hydroxy-5-nitroquinolinium) perchlorate – 8-hydroxy-5-nitroquinoline (1/1), C18H13ClN4O10
  58. The crystal structure of (5-methyl-1,2,4-oxadiazol-3-yl)ferrocene, C13H12FeN2O
  59. Crystal structure of methyl 1-(2-(fluorosulfonyl)ethyl)-2-oxocyclopentanecarboxylate, C9H13FO5S
  60. Crystal structure of the triclinic modification of 1-methyl-4-nitroimidzole, C4H5N3O2
  61. Corrigendum
  62. Crystal structure of 4-bromo-2-(1H-pyrazol-3-yl)phenol, C9H7BrN2O
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