Startseite Crystal structure of hemikis(cyclohexane-1,4-diammonium) (pyridine-2-carboxylate), [C6H16N2]0.5[C6H4NO2]
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Crystal structure of hemikis(cyclohexane-1,4-diammonium) (pyridine-2-carboxylate), [C6H16N2]0.5[C6H4NO2]

  • Sang Loon Tan und Edward R.T. Tiekink EMAIL logo
Veröffentlicht/Copyright: 22. April 2019

Abstract

[C6H16N2]0.5[C6H4NO2], triclinic, P1̄ (no. 2), a = 6.7956(2) Å, b = 7.2840(3) Å, c = 10.2615(4) Å, α = 70.483(3)°, β = 80.902(3)°, γ = 66.404(3)°, V = 438.55(3) Å3, Z = 2, Rgt(F) = 0.0359, wRref(F2) = 0.0988, T = 100(2) K.

CCDC no.: 1897356

The 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:Prism, yellow
Size:0.17 × 0.09 × 0.09 mm
Wavelength:Cu Kα radiation (1.54178 Å)
μ:0.81 mm−1
Diffractometer, scan mode:XtaLAB Synergy, ω-scans
θmax, completeness:76.4°, >99%
N(hkl)measured, N(hkl)unique, Rint:11063, 1832, 0.031
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 1702
N(param)refined:127
Programs:CrysAlisPRO [1], SHELX [2], [3], WinGX and ORTEP [4]
Table 2:

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

AtomxyzUiso*/Ueq
O10.35060(14)0.51918(15)0.84804(9)0.0181(2)
O20.05542(15)0.65042(16)0.72322(10)0.0213(2)
N20.20282(17)0.55312(17)1.10960(11)0.0150(2)
H1N0.3185(19)0.502(2)1.1604(15)0.018*
H2N0.115(2)0.487(2)1.1547(15)0.018*
H3N0.245(3)0.530(3)1.0281(11)0.018*
N10.58332(17)0.63984(17)0.62398(11)0.0172(2)
C10.2495(2)0.61162(19)0.73708(13)0.0153(3)
C20.3748(2)0.68728(19)0.60768(13)0.0148(3)
C30.2745(2)0.8035(2)0.48191(14)0.0182(3)
H30.1267100.8330580.4739160.022*
C40.3938(2)0.8755(2)0.36830(14)0.0213(3)
H40.3288030.9574390.2815050.026*
C50.6094(2)0.8256(2)0.38407(14)0.0204(3)
H50.6958730.8709810.3079630.025*
C60.6969(2)0.7080(2)0.51312(14)0.0199(3)
H60.8450210.6742040.5232580.024*
C70.2360(2)0.8998(2)1.00980(13)0.0156(3)
H7A0.2806090.8702940.9199500.019*
H7B0.3668920.8496631.0628010.019*
C80.0902(2)0.78292(19)1.08993(13)0.0143(3)
H80.0549310.8061131.1829420.017*
C9−0.1189(2)0.8636(2)1.01514(13)0.0157(3)
H9A−0.2128030.7897771.0713090.019*
H9B−0.0870610.8330390.9253880.019*

Source of material

The title salt was prepared through solvent-drop assisted grinding of 3-mercaptobenzoic acid (3-MBA; Aldrich) and N,N′-bis((pyridine-2-yl)methylene)-cyclohexane-1,4-diamine (abbreviated as 2-PMCD) in a 1:1 molar ratio (0.001 mol, 0.154 g for 3-MBA and 0.001 mol, 0.292 g 2-PMCD). 3-MBA was used as received without further purification, while 2-PMCD was prepared according to the literature [5]; M. pt. (Hanon MP-450): 449.3−451.6 K; lit. [5]: 450−451 K. The mixture was ground for 15 min in the presence of few drops of methanol that lead to a yellowish slurry, some of which was subsequently dissolved in DMSO (2 mL) and carefully layered with the same volume of benzene. Yellow granular crystals were obtained approximately one week after the experiment. M. pt: 453.7−455.9 K. IR (Bruker Vertex 70v; cm−-1): 3375−3277 (w) ν(N—H), 3063−2860 (w) ν(C—H), 1630 (w) ν(COO), 1574−1551(s) ν(C=C), 1384(s) ν(C—N), 749 (s) δ(C=C).

Experimental details

The C-bound H atoms were geometrically placed (C—H = 0.95−0.99 Å) and refined as riding with Uiso(H) = 1.2Ueq(C). The N-bound H-atoms were located in difference Fourier maps but were refined with a distance restraint of N—H = 0.88 ± 0.01 Å, and with Uiso(H) set to 1.2Uequiv(N). Owing to poor agreement, two reflections, i.e. (1 1 4) and (2 2 5), were omitted from the final cycles of refinement.

Discussion

The isomeric Schiff bases appended with pyridyl donors, N,N′-bis((pyridine-n-yl)methylene)cyclohexane-1,4-diamines for n = 2, 3 and 4, that is, of general formula (n-py)—CH=N—C6H10–N=CH—(n-py) for n = 2–4, were prepared and characterized sometime ago [5], [6]. Since the original syntheses [5], investigations have focused upon their utility in forming coordination polymers of cadmium [6], cobalt [7] and silver [8], [9] salts. To the best of our knowledge, no reports on co-crystals of these Schiff base molecules exist. Recent studies of co-crystals designed to incorporate n-mercaptobenzoic acid as a conformer [10], [11] resulted in unexpected outcomes, e.g. oxidation of the thiol, a well known phenomenon for n-mercaptobenzoic acids [12], and desulfurization [13], again observed previously [14]. As a follow up to these studies, a co-crystallization experiment between an authenticated [5] sample of (2-py)—CH=N—C6H10–N=CH—(2-py) and 3-mercaptobenzoic acid was undertaken which lead to the isolation of the title 1:2 salt, that is, [H3NC6H10NH3]: 2[C6H4NO2].

X-ray crystallography showed the composition of the product isolated from the co-crystallization experiment to comprise a cyclohexane-1,4-diammonium di-cation, located about a center of inversion, and a pyridine-2-carboxylate anion in a general position (Figure, 70% probability displacement ellipsoids with unlabelled atoms related by the symmetry operation − x, 2 − y, 2 − z). The confirmation of the presence of ammonium and carboxylate groups is seen in the pattern of supramolecular aggregation (see below). In addition, the carboxylate-C1—O1, O2 bond lengths are essentially equivalent, being 1.2595(16) and 1.2546(16) Å, respectively. The cation has a chair conformation indicating the 1,4-ammonium groups are anti. The pyridine-2-carboxylate anion is planar as seen in the magnitude of the O1—C1—C2—N1 torsion angle of 2.71(17)°.

In the crystal, significant charge-assisted hydrogen bonding is apparent. Thus, ammonium-N—H⋯O(carboxylate), N(pyridyl) hydrogen bonds cooperate to assemble ions into a supramolecular layer parallel to [0 0 1]. The hydrogen bond donated by ammonium-N—H1n atoms is bifurcated, effectively bridging O(carboxylate) and N(pyridyl) atoms of the same anion forming a five-membered {H⋯OC2N⋯} synthon [N2—H1n⋯O1i: H1n⋯O1i = 2.181(14) Å, N2⋯O1i = 2.9429(17) Å with angle at H1n = 143.1(12)°; N2—H1n⋯N1i: H1n⋯N1i = 2.190(15) Å, N2⋯N1i = 2.9352(16) Å with angle at H1n = 140.8(12)°; symmetry operation (i) 1 − x, 1 − y, 2 − z]. The H1n⋯O1 edge of this synthon, edge “1”, is connected to another edge “1” via a second ammonium-N1—H3n⋯O1 hydrogen bond to form an eight-membered {⋯HNH⋯O}2 synthon [N2—H3n⋯O1: H3n⋯O1 = 1.889(13) Å, N2⋯O1 = 2.7687(14) Å with angle at H3n = 170.2(18)°], indicating the carboxylate-O1 atom participates in two hydrogen bonds. The remaining hydrogen bond involves the carboxylate-O2 atom and involves edge “2” of the aforementioned synthon, where two of these are linked into a 12-membered {⋯HNH⋯OCO}2 synthon [N2—H2n⋯O2ii: H2n⋯O2ii = 1.883(15) Å, N2⋯O2ii = 2.7663(16) Å with angle at H2n = 170.4(13)°; symmetry operation (ii) − x, 1 − y, 2 − z]. In this way, supramolecular tapes comprising alternating eight- and 12-membered synthons along the a-axis are formed. The layers interdigitate along the c-axis enabling the formation of π⋯π stacking interactions between centrosymmetrically related pyridyl rings [inter-centroid separation = 3.6569(8) Å for symmetry operation (iii) − x, − y, − z] thereby stabilizing the three-dimensional packing.

The most closely related structure in the literature is that of the 2-isomeric structure, i.e. hemikis(cyclohexane-1,4-diammonium) (pyridine-2-carboxylate) [15]. It is interesting to note that supramolecular layers constructed by hydrogen bonds and connected by π⋯π stacking interactions are also apparent in this crystal.

Acknowledgements

Sunway University is thanked for support of crystal engineering studies (Grant No. INT-FST-RCCM-2016−01).

References

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Received: 2019-01-28
Accepted: 2019-02-15
Published Online: 2019-04-22
Published in Print: 2019-06-26

© 2019 Sang Loon Tan et al., published by De Gruyter, Berlin/Boston

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

Artikel in diesem Heft

  1. Frontmatter
  2. Crystal structure of (E)-2-(1-((2-aminophenyl)imino)ethyl)-5-fluorophenol, C14H13FN2O
  3. Crystal structure of (E)-2-(1-((2-aminophenyl)imino)ethyl)-4,6-dichlorophenol, C14H12Cl2N2O
  4. The crystal structure of (E)-1-(4-methoxyphenyl)-3-(2-nitrophenyl)triaz-1-ene C8H8N2O4
  5. Crystal structure of (E)-2-(((6-bromopyridin-2-yl)methylene)amino)-3′,6′-bis(ethylamino)-2′,7′-dimethylspiro[isoindoline-1,9′-xanthen]-3-one—methanol (1:1), C32H30N5O2Br ⋅ CH4O
  6. Crystal structure of 2,4-pentanedione bis(2,4-dinitrophenylhydrazone), C17H16N8O8
  7. Crystal structure of sodium morpholine-4-carbodithioate, (C5H12NNaO3S2)
  8. Crystal structure of 1,1′-(hexane-1,6-diyl)bis(3-ethyl-1H-imidazol-3-ium) bis(hexafluorido phosphate), C16H28F12N4P2
  9. Crystal structure of 5-(4-chlorophenyl)-3-(4-fluorophenyl)-1-phenyl-4,5-dihydro-1H-pyrazole, C21H16ClFN2
  10. Crystal structure of catena-poly[diaqua-bis(3-carboxy-5-methoxybenzoato-κO)-(1,2-bis(imidazol-1-yl)ethane-κ2N:N′)cobalt(II)], C26H28CoN4O12, [Co(C9H6O5)2(H2O)2(C8H10N4)]
  11. The crystal structure of 3-cyclohexyl-1,5-dioxaspiro[5.5]undecane-2,4-dione, C15H22O4
  12. Crystal structure of (2,4-dimethoxybenzyl)triphenylphosphonium trifluoroacetate — trifluoroacetic acid (1/1), C31H27F6O6P
  13. Crystal structure of 4-tert-butyl-1-(2,6-dimethylphenyl)-1H-1,2,3-triazole, C14H19N3
  14. Crystal structure of 1,1′-methylenebis(4-tert-butylpyridinium) tetrachloridocobaltate(II) – dichloromethane (1:1), C20H30Cl6CoN2
  15. Crystal structure of (4,4′-(ethane-1,2-diylbis((nitrilo)(2-furylmethylylidene)))bis(3-methyl-1-phenyl-1H-pyrazol-5-olato-κ4N,N′,O,O′))-nickel(II)), C32H26N6NiO4
  16. Synthesis and crystal structure of bis{((E)-((4-((E)-1-(benzyloxyimino)ethyl)phenyl)imino)methyl)-2-phenolato-κ2N,O}copper(II), C44H38CuN4O4
  17. Crystal structure of catena-poly[diaqua-bis(3,5-dichloropyridine-4-carboxylato-κ1O)-bis(μ2-4,4′-bipyridine-κ2N:N′)cobalt(II)], C22H16Cl4CoN4O6
  18. The crystal structure of 2-(4-chloro-2,6-dinitrophenyl)-1-(4-chloro-3,5-dinitrophenyl)diazene 1-oxide, C12H4Cl2N6O9
  19. The crystal structure of 3-(1H-benzo[d]imidazol-2-yl)-7-chloro-1-cyclopropyl-6-fluoro-1,4-dihydroquinolin — dimethylsulfoxide (1/1), C21H19ClFN3O2S
  20. The crystal structure of dichlorido-bis(1-butyl-1H-imidazole-κN)zinc(II), C14H24Cl2ZnN4
  21. (Z)-N-tert-butyl-1-(2-(3,5-dichlorobenzamido)phenyl) methanimine oxide, C18H18Cl2N2O2
  22. Crystal structure of diaqua-bis(3-carboxy-5-bromoisophthalato-κO)-bis(1-(3-(1H-benzo[d]imidazol-1-yl)propyl)-1H-benzo[d]imidazol-3-ium-κN)nickel(II) bis(3-carboxy-5-bromoisophthalate), C66H54Br4N8NiO18
  23. Crystal structure of poly[aqua(μ2-5-methoxyisophthalato-κ2O,O′:O′′)-(1,2-bis(imidazol-1′-yl)ethane-κ2N:N′)cobalt(II), C34H36Co2N8O12
  24. Crystal structure of poly[diaqua-bis(μ2-1-(4-(1H-imidazol-1-yl)benzyl)-1H-1,2,4-triazole-κ2N:N′)manganese(II)] terephthalate tetrahydrate, MnC32H38N10O10
  25. Crystal structure of the fluorescent fipronil derivative 5,5′-(methylenebis(azanediyl))bis(1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-4-((trifluoromethyl)sulfinyl)-1H-pyrazole-3-carbonitrile), C25H6N8O2Cl4F12S2
  26. Crystal structure of the phosphorescent complex diethyldithiophosphonato-κ2S,S′-bis(2-phenylpyridinato-κ2C,N)iridium(III), C26H26N2O2PS2Ir
  27. The crystal structure of 4,10-diethoxy-6H,12H-6,12-epoxydibenzo[b,f][1,5]dioxocine, C18H18O5
  28. Crystal structure of dichlorido-bis(N-benzyl-2-(quinolin-8-yloxy)acetamide-κ2N,O)copper(II) — ethyl acetate (1/1), C38H36N4O6Cl2Cu
  29. Synthesis and crystal structure of bis{4-methyl-2-((E)-((4-((E)-1-(benzyloxyimino)ethyl)phenyl)imino)methyl)phenolato-κ3N,O,O}copper(II), C92H84Cu2N8O8
  30. The crystal structure of 1,3,5-trinitro-4,6-diazidobenzene, C6HN9O6
  31. Crystal structure 1-cinnamyl-2-((Z)-styryl)-1H-benzo[d]imidazole — methanol (1/1), C24H20N2 ⋅ CH4O
  32. The crystal structure of poly[m2-aqua-tetraaqua-bis(m9-4-formylbenzene-1,3-disulfonato)tetrasodium(I) hydrate, C14H18O19S4Na4
  33. Crystal structure of 2-((2,8-bis(trifluoromethyl)quinolin-4-yl)(hydroxy)methyl)piperidin-1-ium trifluoroacetate, [C17H17F6N2O][C2F3O2]
  34. The crystal structure of bis(ferrocenecarboxylato-κ2O,O′)bis[4-(dimethylamino)pyridine-κN]copper(II) — acetonitrile(1/2), C40H44CuO4Fe2N6
  35. Crystal structure of poly[di-μ2-aqua)-diaqua-bis(μ6-4,4′,4′′-(benzene-1,3,5-triyltris(oxy))tribenzoato-κ6O1:O2:O3:O3:O5:O6)tricadmium(II)] dihydrate, C54H42Cd3O24
  36. The crystal structure of dichlorido(1,3-bis(2,6-diisopropyl-phenyl)-1H-3λ4-imidazol-2-yl)(3-phenyl-pyridine-κN)palladium(IV), C38H45N3Cl2Pd
  37. The crystal structure of 2-chloro-4-(prop-2-yn-1-yloxy)-6-phenyl-1,3,5-triazine, C12H8ClN3O
  38. The crystal structure of 2,6-di-tert-butyl-4-(phenyl(phenylsulfonyl)methyl)phenol, C27H32O3S
  39. Crystal structure of bis{μ2-bis{(((((1-methoxyimino)ethyl)phenyl)imino)methyl)-2-phenolato-κ3N,O:O}copper(II)}, C68H68Cu2N8O8
  40. Crystal structure of catena-poly[tetraaqua-bis(μ2-2-(4-carboxylatophenoxy)benzoato-κ2O:O′)-pentakis(pyridine-κ1N)dinickel(II)], C53H47N5Ni2O13
  41. Synthesis and crystal structure of 1-(2,6-dichloro-4-trifluoromethyl-phenyl)-5-(3-methoxy-benzylamino)-4-trifluoromethanesulfinyl-1H-pyrazole-3-carbonitrile, C20H12N4Cl2F6O2S
  42. Redetermination of the crystal structure of bis(μ2-di-ethyldithiocarbamato-κ3S,S′:S3S:S: S′)-hexacarbonyl-di-rhenium(I), C16H20N2O6Re2S4
  43. The crystal structure of (E)-N′-((2-hydroxynaphthalen-1-yl)methylene)-2-phenylacetohydrazide, C19H16O2N2
  44. Crystal structure of 6-hydroxy-4,8,11b-trimethyltetradecayhdro-8,11-epoxy-6a,9-methanocyclohepta[a]naphthalene-4-carboxylic acid – methanol (1/1), C20H30O4
  45. The crystal structure of aqua-bis(3-acetyl-2-oxo-2H-chromen-4-olato-κ2O,O′)zinc(II) monohydrate, C22H18O10Zn
  46. Crystal structure of poly[bis(μ2-4-bromoisophthalate-κ2O:O′)-tris(μ2-1-(3-((1H-1,2,4-triazol-1-yl)methyl)benzyl)-1H-1,2,4-triazole-κ2N:N′)dicobalt(II)] monohydrate, C26H23CoN9O5Br
  47. A cyclic I102− anion in the layered crystal structure of theophyllinium pentaiodide, C7H9I5N4O2
  48. Crystal structure of catena-poly[diaqua-bis(μ2-4-((4-(pyridin-2-ylmethoxy)phenyl)diazenyl)benzoato-κ3O,O′:N)cadmium(III)], Cd(C19H14O3N3)2(H2O)
  49. Crystal structure of catena-poly[(μ2-4,4′-bipyridyl-κN,N′)-bis(O,O′-dimethyldithiophosphato-κS)-zinc(II)], {C14H20N2O4P2S4Zn}n
  50. Crystal structure of 3-amino-2-hydroxy-6-methoxybenzamide hydrate, C16H22N4O7
  51. Crystal structure of hemikis(cyclohexane-1,4-diammonium) (pyridine-2-carboxylate), [C6H16N2]0.5[C6H4NO2]
  52. Crystal structure of 2-chloro-4-(prop-2-yn-1-yloxy)-6-(thiophen-2-yl)-1,3,5-triazine, C10H6ClN3OS
  53. The crystal structure of 3-butyl-1-methyl-1H-imidazol-3-ium catena-poly[tris(μ2-bromido-κ2Br:Br)lead(II)], C8H15Br3N2Pb
  54. Crystal structure of 3-(5-amino-1H-1,2,4-triazol-3-yl)-1-(piperidin-1-yl)propan-1-one, C10H17N5O
  55. Crystal structure of aqua-2,2′,2′′-(((nitrilo-κN-tris(ethane-2,1-diyl))tris(azanylylidene-κ3N′,N′′,N′′′))tris(methanylylidene))tris(4-chlorophenolato-κ3O,O′,O′′)neodymium(III), C27H26Cl3N4NdO4
  56. Crystal structure of dichlorido-(μ2-2,2′-(diazene-1,2-diyl)bis(benzen-1-ido)-κ2C:C′)dimercury(II), C12H8Cl2Hg2N2
  57. Crystal structure of (3E,5E)-3,5-bis(4-cyanobenzylidene)-1-((4-fluorophenyl)sulfonyl)piperidin-4-one, C27H18FN3O3S
  58. Crystal structure of dichlorido(pyridine-κN)(2,4,6-tri-2-pyridyl-1,3,5-triazine-κ3N2,N1,N6)nickel(II), C23H17Cl2N7Ni
  59. Redetermination of the crystal structure of tetrakis(4-chlorobenzyl)tin(IV), C28H24Cl4Sn
  60. The crystal structure of 2,6-bis(pyridin-1-ium-3-ylmethyl)hexahydro-4,8-ethenopyrrolo-[3,4-f] isoindole-1,3,5,7-tetrone tetrachloridocuprate(II) monohydrate, C24H24Cl4CuN4O5
  61. Crystal structure of cyclo-[octaaqua-tetrakis(μ2-5,5′-(1H-imidazole-4,5-diyl)bis(tetrazol-2-ido)-κ4N,N′,N′′,N′′′)tetramagnesium(II)], C20H24N40O8Mg4
  62. The crystal structure of a matrine derivative, 13-(4-Cl-pyrrole)-matrine, C18H26ClN4O
  63. Crystal structure of (dibenzyl sulphoxide-κO)bis(2-chlorobenzyl-κC1)dichloridotin(IV), C28H26Cl4OSSn
  64. Crystal structure of catena-poly[(μ2-azido-κ2N:N)(μ2-4-cyanobenzoato-κ2O:O′)-(μ2-methanol-κ2O:O)copper(II)], C9H8CuN4O3
  65. Crystal structure of 1,1′-dibenzyl-3,3′-dicyano-1,1′,4,4′-tetrahydro-4,4′-bipyridine, C26H22N4
  66. Crystal structure of (2-bromobenzyl)((1-bromonaphthalen-2-yl)methyl)sulfane, C18H14Br2S
  67. Crystal structure of 2-(4-ammoniocyclohexyl)-3-(pyridin-2-yl)imidazo[1,5-a]pyridin-2-ium 2-[(2-carboxylatophenyl)disulfanyl]benzoate dihydrate, [C18H22N4][C14H8O4S2] ⋅ 2H2O
  68. Crystal structure of (E)-N-((3R,5S,10S, 13S,14S,17S)-17-((S)-1-(dimethylamino)ethyl)-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-3-yl)-2-methylbut-2-enamide – water – methanol (1/1/1), C29H54N2O3
  69. Crystal structure of methyl 2-(4-(3-(2,4-difluorophenyl)pyrazolo[1,5-a]pyrimidin-6-yl)phenyl)acetate, C21H15F2N3O2
  70. Crystal structure of poly[triaqua-(μ4-benzene-1,3,5-tricarboxylato-κ5O1,O2:O3:O4:O5)-(μ2-5-(3-pyridyl)tetrazolato-κ2N1:N3)dizinc(II)], C15H13N5O9Zn2
  71. Crystal structure of N-(3-methylphenyl)(propan-2-yloxy)carbothioamide, C11H15NOS
  72. Crystal structure of poly[(μ2-1,3-bis(imidazol-1-ylmethyl)benzene-κ2N:N′)(nitrato-κ1O)cadmium(II)] — water (2/1), C28H32CdN10O7
  73. Crystal structure of 4-phenyl-2,4-dihydro-3H-1,2,4-triazole-3-thione, C8H7N3S
  74. Crystal structure of benzyltrichloridobis(1H-pyrazole-κ2N)tin(IV), C13H15Cl3N4Sn
  75. Crystal structure of chlorido-4-fluorobenzyl-bis(2-methylquinolin-8-olato-κ2N,O)tin(IV), C27H22ClFN2O2Sn
  76. Crystal structure of tetrakis(O,O′-diisopropyldithiophosphato-κ2S,S′)-(μ2-1,2-bis(4-pyridylmethylene)hydrazine-κ2N:N′)zinc(II), C36H66N4O8P4S8Zn2
  77. Crystal structure of tetrabutylammonium 4,4-oxydibenzoate – boric acid – water (1/2/6) C46H98B2N2O17
  78. Redetermination of the crystal structure of catena-poly[[tribenzyltin(IV)]-(μ2-pyridine-4-carboxylato-κ2N:O)], C27H25NO2Sn
  79. The synthysis and crystal structure of cyclohexyl 5-amino-1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-4-((trifluoromethyl)sulfinyl)-1H-pyrazole-3-carboxylate, C18H15N3Cl2F6O3S
  80. The crystal structure of 5,7-bis(2-hydroxyethoxy)-2-phenyl-4H-chromen-4-one, C19H18O6
  81. Synthesis and crystal structure of (±)-Ethyl 5′-(difluoromethyl)-2-oxo-4′,5′-dihydrospiro[indoline-3,3′-pyrazole]-4′-carboxylate, C14H13F2N3O3
Heruntergeladen am 1.10.2025 von https://www.degruyterbrill.com/document/doi/10.1515/ncrs-2019-0091/html
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