Startseite The crystal structure of tris(6-methylpyridin-2-yl)phosphine selenide, C18H18N3PSe
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The crystal structure of tris(6-methylpyridin-2-yl)phosphine selenide, C18H18N3PSe

  • Gui-Ling Wu ORCID logo EMAIL logo
Veröffentlicht/Copyright: 31. Januar 2022
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Zeitschrift für Kristallographie - New Crystal Structures
Aus der Zeitschrift Zeitschrift für Kristallographie - New Crystal Structures Band 237 Heft 2

Abstract

C18H18N3PSe, monoclinic, P21/n (no. 14), a = 9.3064 (9) Å, b = 17.7311 (18) Å, c = 11.0556(11) Å, β = 105.317(1)°, V = 1759.5 Å3, Z = 4, Rgt(F) = 0.0365, wRref(F2) = 0.0919, T = 296(2) K.

CCDC no.: 2142281

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: Colourless block
Size: 0.20 × 0.15 × 0.10 mm
Wavelength: Mo Kα radiation (0.71073 Å)
μ: 2.23 mm−1
Diffractometer, scan mode: Bruker APEX-II, φ and ω
θmax, completeness: 32.2°, >99%
N(hkl)measured, N(hkl)unique, Rint: 27,083, 5848, 0.029
Criterion for Iobs, N(hkl)gt: Iobs > 2 σ(Iobs), 5031
N(param)refined: 211
Programs: Bruker [1], Olex2 [2], SHELX [3, 4]
Table 2:

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

Atom x y z Uiso*/Ueq
C1 0.30290 (18) 0.81857 (9) 0.01628 (14) 0.0313 (3)
C2 0.1945 (2) 0.83306 (12) −0.09355 (16) 0.0439 (4)
H2 0.125608 0.871717 −0.098819 0.053*
C3 0.1933 (3) 0.78685 (15) −0.19646 (18) 0.0591 (6)
H3 0.121651 0.793598 −0.272171 0.071*
C4 0.2988 (3) 0.73171 (14) −0.18430 (19) 0.0560 (6)
H4 0.299159 0.700769 −0.252133 0.067*
C5 0.4047 (2) 0.72180 (11) −0.07161 (18) 0.0437 (4)
C6 0.5213 (3) 0.66142 (13) −0.0543 (2) 0.0602 (6)
H6A 0.617716 0.683062 −0.018597 0.090*
H6B 0.518845 0.639329 −0.134092 0.090*
H6C 0.501844 0.623220 0.000868 0.090*
C7 0.30510 (16) 0.79401 (8) 0.27103 (13) 0.0276 (3)
C8 0.39940 (19) 0.78926 (11) 0.39083 (15) 0.0367 (3)
H8 0.470297 0.826288 0.421962 0.044*
C9 0.3840 (2) 0.72680 (12) 0.46297 (17) 0.0436 (4)
H9 0.445226 0.721146 0.543816 0.052*
C10 0.2779 (2) 0.67407 (11) 0.41359 (18) 0.0436 (4)
H10 0.268310 0.631456 0.459869 0.052*
C11 0.18340 (19) 0.68429 (9) 0.29284 (17) 0.0358 (3)
C12 0.0634 (3) 0.62842 (11) 0.2377 (2) 0.0524 (5)
H12A −0.009056 0.628384 0.285495 0.079*
H12B 0.106214 0.579029 0.239832 0.079*
H12C 0.015987 0.642028 0.152447 0.079*
C13 0.49402 (16) 0.91372 (8) 0.20445 (13) 0.0274 (3)
C14 0.5695 (2) 0.92949 (10) 0.11526 (16) 0.0355 (3)
H14 0.531612 0.914503 0.032324 0.043*
C15 0.7036 (2) 0.96841 (11) 0.15303 (18) 0.0413 (4)
H15 0.756904 0.980683 0.095488 0.050*
C16 0.7559 (2) 0.98838 (10) 0.27697 (18) 0.0409 (4)
H16 0.845887 1.013950 0.304219 0.049*
C17 0.6743 (2) 0.97040 (10) 0.36155 (16) 0.0377 (3)
C18 0.7271 (3) 0.99008 (18) 0.4985 (2) 0.0662 (7)
H18A 0.650679 1.017716 0.523034 0.099*
H18B 0.815408 1.020443 0.512744 0.099*
H18C 0.748947 0.944638 0.547102 0.099*
N1 0.40678 (17) 0.76489 (8) 0.02889 (13) 0.0355 (3)
N2 0.19774 (15) 0.74375 (8) 0.22234 (13) 0.0319 (3)
N3 0.54352 (16) 0.93426 (8) 0.32509 (13) 0.0330 (3)
P1 0.30913 (4) 0.87031 (2) 0.16087 (3) 0.02617 (8)
Se1 0.13816 (2) 0.95049 (2) 0.14172 (2) 0.04267 (7)

Source of material

The 2-bromo-6-methylpyridine (30 mmol), red phosphorus (30 mmol) and powdered KOH (30 mmol) were dissolved in 20 mL DMSO and 1 mL H2O. The solution was stirred for 1 h at 120 °C under dry argon and cooled to room temperature. Then 40 mL H2O wad added and the mixture was extracted with CHCl3 (3 × 20 mL). The solvent was removed under reduced pressure and the residue washed with diethyl ether (10 mL) and dried in vacuo to afford the phosphine product as a microcrystalline powder. Powdered gray selenium (10 mmol) and degassed toluene (20 mL) were added to the above solids, and the suspension was refluxed for 3 h. After cooling to room temperature the excess selenium was filtered off. The filtrate was evaporated to dryness under vacuum and a beige-colored powder was obtained. Crystals were obtained by slow evaporation in CHCl3 and CH3OH within 7 days.

Comment

Pyridyl-substituted phosphines have been extensively used in metal ion coordination chemistry due to their fundamental importance and prospective applications [5], [6], [7]. Tris(2-pyridyl)phosphine exhibits rich coordination capabilities owing to its structure. On the other hand, there are many studies on the substitution of pyridine-4-yl substituents in the substituents of pyridine [8, 9]. However, the pyridine-6-yl substituents are less investigated.

The asymmetric unit contains one independent molecule. The nitrogen atoms (N2, N3) are almost form a plane with P1 and C1, while the remaining nitrogen atom (N1) forms a plane with C1, P1 and Se1 (see the figure). This type of arrangement is different from previously seen ones in the structure of tris(2-pyridyl)phosphine oxide and tris(2-pyridyl)phosphine sulphide. However, in the reported tris(2-pyridyl)phosphine selenide structure [10], all nitrogen atoms point in the same direction (towards Se), which can be related to the steric requirement bearing a methyl group at the 6-position of the pyridyl ring. The P=Se bond distance of 2.1022(4) Å is comparable with similar structures found in the literature showing typical double bond character [8], [9], [10]. The pyridine ring (N1/C1–C5) makes dihedral angles of 70.97(11)° and 72.42(11)° with the other two pyridine rings (N2/C7–C11 and N3/C13–C17), respectively. In addition, the crystal structure exhibits weak C–H⃛π interactions. [C(6)–H(6A)⃛Cg2′ = 2.94 (4)°Å; Cg2 is the centroid of pyridine ring (N2, C6, C7, C8, C9, C10); ′ = x−1/2, −y+1/2, z+1/2]. The stability of crystal structure can be accounted by this interaction. Furthermore, there are no other obvious π⃛π stacking interactions, as the centroid to centroid distance between the two nearest rings is greater than 4.5 Å.

Corresponding author: Gui-Ling Wu, Department of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyun, 558000, People’s Republic of China, E-mail:

Funding source: Qiannan Normal University for Nationalities

Award Identifier / Grant number: qnsy2017002

Funding source: Scientific and Technological Project for Agriculture of Qiannan

Award Identifier / Grant number: [2018]12

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

  2. Research funding: The authors is grateful to the projects of Qiannan Normal University for Nationalities (qnsy2017002) and the scientific and technological project for agriculture of Qiannan (Qiannankehe[2018]12) for financial support.

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

References

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Received: 2021-11-28
Accepted: 2022-01-15
Published Online: 2022-01-31
Published in Print: 2022-04-26

© 2022 Gui-Ling Wu, 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
  3. Crystal structure of {2,2′-{cyclohexane-1,2-diylbis[(azanylylidene)methylylidene]}bis(2,4-dibromophenolato)-κ4 N,N′,O,O′}copper(II) ─ diethylformamide (1/1), C23H23Br4CuN3O3
  4. The crystal structure of 2-(2-methyl-6-phenyl-4H-pyran-4-ylidene)-1H-indene-1,3(2H)-dione, C21H14O3
  5. Crystal structure of bis((1-methylbenzimidazol-2-yl)methyl)amine, C18H19N5
  6. Crystal structure of (E)-N′-(1-(2-hydroxy-4-methoxyphenyl)ethylidene) isonicotinohydrazide, C15H15N3O3
  7. Crystal structure of 2-((4-phenyl-5-(pyridin-4-yl)-4H-1,2,4-triazol-3-yl)thio)acetonitrile, C15H11N5S
  8. The crystal structure of 2,2′-((1E,1′E)-hydrazine-1,2-diylidenebis(methaneylylidene))bis(4-chlorophenol), C14H10Cl2N2O2
  9. Dichlorido-{2,6-bis(4,5-dihydro-1H-pyrazol-3-yl)pyridine-κ3 N,N′,N″}zinc(II), C11H9C12N5Zn
  10. The crystal structure of dichlorido-(2-((4-phenyl-2H-1,2,3-triazol-2-yl)methyl)pyridine-κ2N,N′)palladium(II), C14H12Cl2N4Pd
  11. The crystal structure of 1-(N1-benzyl-2-methyl-4-nitro-imidazol-5-yl)-4-(prop-2-yn-1-yl) piperazine, C18H21N5O2
  12. Crystal structure of (μ4-(1,2,4,5-tetra(1,2,4-triazol-1-ylmethyl)-benzene-κ4N:N1:N2:N3)disilver(I) diperchlorate
  13. The crystal structure of 1-(2-bromoethane)-4-amine-3,5-dinitropyrazole, C5H6Br1N5O4
  14. Crystal structure of (E)-1-(4-benzyl-3,5-dioxomorpholin-2-ylidene)ethyl acetate, C15H15N1O5
  15. The crystal structure of poly[diaqua-(μ2-1,2,4,5-tetrakis(1,2,4-triazol-1-ylmethyl)-benzene-κ2N:N′)-bis(μ3-terephthalato-κ3O:O′:O′′)dicadmium(II)], C17H15N6O5Cd
  16. Crystal structure of (E)-N′-(1-(5-chloro-2-hydroxyphenyl) ethylidene)thiophene-2-carbohydrazide, C13H11ClN2O2S
  17. The crystal structure of [(2,2′-bipyridine-k2 N,N)-bis(6-phenylpyridine-2-carboxylato-k2 N,O)cobalt(II)]-monohydrate, C36H26N4O5Co
  18. Crystal structure of (E)-N′-(2-chloro-6-hydroxybenzylidene)-3-hydroxybenzo-hydrazide monohydrate, C14H13ClN2O4
  19. Crystal structure of 1,1′-(methylene)bis(pyridin-1-ium) bis(1,2-dicyanoethene-1,2-dithiolato-κ2S:S)nickel(II), C42H30N14Ni2S8
  20. Crystal structure of 1,1′-(1,2-ethanediyl)bis(pyridin-1-ium) bis(1,2-dicyanoethene-1,2-dithiolato-κ2 S:S)nickel(II), C20H14N6NiS4
  21. The crystal structure of 1-methyl-1H-pyrazol-2-ium nitrate, C4H7O3N3
  22. The crystal structure of 4,4′-diselanediylbis(8-(hexyloxy)-3,6-dimethyl-1-(piperidin-1-yl)isoquinoline-7-carbonitrile), C46H60N6O2Se2
  23. The crystal structure of tris(6-methylpyridin-2-yl)phosphine selenide, C18H18N3PSe
  24. The crystal structure of 1,2-bis(2,4-dinitro-1H-imidazol-1-yl)ethane ─ acetone (1/1), C11H12N8O9
  25. Crystal structure of [diaqua[2,2′-(1,2-phenylene)bis(1H-imidazole-4-carboxylato-5-carboxy)-κ4N,N′,O,O′]nickel(II)] tetrahydrate, C16H12N4NiO10·4H2O
  26. The crystal structure of tris(4-methyl-1H-pyrazol-1-yl)methane, C13H16N6
  27. The crystal structure of 5,6-dichloro-2-(quinolin-8-yl)isoindoline-1,3-dione, C17H8Cl2N2O2
  28. Crystal structure of (E)-(2-methoxy-benzylidene)-(4-[1,2,4]triazol-1-yl-phenyl)-amine, C16H14N4O
  29. The crystal structure of (Z)-2-(4-(4-bromophenyl)thiazol-2-yl)-4-(3-hydroxybut-2-enoyl)-5-methyl -1,2-dihydro-3H-pyrazol-3-one – methanol (1/1), C18H18N3O4S
  30. Crystal structure of tetraaqua-tris(nitrato-κ2 O,O′) erbium(III) monohydrate, Er(NO3)3·5H2O, H10ErN3O14
  31. The crystal structure of 1-methyl-2-nitro-1H-imidazole 3-oxide, C4H5N3O3
  32. The crystal structure of 1-methyl-2-nitroimidazole, C4H5N3O2
  33. The crystal structure of 2-carboxyl-4-nitroimidazole monohydrate, C4H5N3O5
  34. Crystal structure of bis[hydrido-hexaphenylcarbodiphosphoran][tetra-trifluoromethyl-(μ-diiodo)-diplatinat]
  35. The crystal structure of poly[μ2-aqua- aqua-(μ3-(E)-2-(4-((2-carbamothioylhydrazineylidene)methyl)phenoxy)acetato-κ3 O:S:S)sodium(I)], C10H14N3O5SNa
  36. The twinned crystal structure of [4,4′-bipyridine]-1,1′-diium hexachloridostannate(IV), C10H10N2SnCl6
  37. The crystal structure of [(2,2′-bipyridine-k2 N,N)-bis(6-phenylpyridine-2-carboxylate-k2 N,O)copper(II)], C34H24N4O4Cu
  38. Crystal structure of trans-1,2-bis(pyridinium-4-yl) ethylene bis(2-carboxy-4-bromobenzoate) – water (1/4), C14H14BrNO6
  39. Crystal structure of poly[diaqua-(μ3-fumarato)-(μ3-maleato)-(μ4-1,2,4,5-tetrakis((1H-1,2,4-triazol-1-yl)methyl)benzene)tetracadmium(II)] dihydrate, C34H32N12O9Cd4
  40. Crystal structure of a second modification of Pachypodol, C18H16O7
  41. Crystal structure of methyl 2-(4-(2-(cyclopentyl-amino)-1-(N-(4-methoxyphenyl)-1-methyl-5-phenyl-1-H-pyrazole-3-carboxamido)-2-oxoethyl)phenyl)acetate, C34H36N4O5
  42. The crystal structure of catena-poly[(m2-4,4′-bipyridine-κ2 N:N)-bis(6-phenylpyridine-2-carboxylato-κ2 N,O) zinc(II)], C34H24N4O4Zn
  43. The crystal structure of hexaquamagnesium(II) (2,4-bis(nitroimino)-6-oxo-1,3,5-triazinane-1,3-diide), C3H15MgN7O12
  44. The crystal structure of 7-Bromo-2-(4-chloro-phenyl)-quinoxaline, C14H9BrClN2
  45. Crystal structure of methyl 4-{[4-(4-cyanobenzamido)phenyl]amino}benzofuro[2,3-d]pyrimidine-6-carboxylate, C26H17N5O4
  46. The crystal structure of (4SR)-7-(3,4-dichlorobenzyl)-4,8,8-trimethyl-7,8-dihydroimidazo[5,1c][1,2,4]triazine-3,6(2H,4H)-dione, C15H16Cl2N4O2
  47. Crystal structure of catena-poly[{μ2-3-carboxy-2,3-bis((4-methylbenzoyl)oxy)propanoato-κ2 O:O′}tris(methanol-κ1 O)lanthanum(III)], C63H63LaO27
https://doi.org/10.1515/ncrs-2021-0455
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Artikel in diesem Heft

  1. Frontmatter
  2. New Crystal Structures
  3. Crystal structure of {2,2′-{cyclohexane-1,2-diylbis[(azanylylidene)methylylidene]}bis(2,4-dibromophenolato)-κ4 N,N′,O,O′}copper(II) ─ diethylformamide (1/1), C23H23Br4CuN3O3
  4. The crystal structure of 2-(2-methyl-6-phenyl-4H-pyran-4-ylidene)-1H-indene-1,3(2H)-dione, C21H14O3
  5. Crystal structure of bis((1-methylbenzimidazol-2-yl)methyl)amine, C18H19N5
  6. Crystal structure of (E)-N′-(1-(2-hydroxy-4-methoxyphenyl)ethylidene) isonicotinohydrazide, C15H15N3O3
  7. Crystal structure of 2-((4-phenyl-5-(pyridin-4-yl)-4H-1,2,4-triazol-3-yl)thio)acetonitrile, C15H11N5S
  8. The crystal structure of 2,2′-((1E,1′E)-hydrazine-1,2-diylidenebis(methaneylylidene))bis(4-chlorophenol), C14H10Cl2N2O2
  9. Dichlorido-{2,6-bis(4,5-dihydro-1H-pyrazol-3-yl)pyridine-κ3 N,N′,N″}zinc(II), C11H9C12N5Zn
  10. The crystal structure of dichlorido-(2-((4-phenyl-2H-1,2,3-triazol-2-yl)methyl)pyridine-κ2N,N′)palladium(II), C14H12Cl2N4Pd
  11. The crystal structure of 1-(N1-benzyl-2-methyl-4-nitro-imidazol-5-yl)-4-(prop-2-yn-1-yl) piperazine, C18H21N5O2
  12. Crystal structure of (μ4-(1,2,4,5-tetra(1,2,4-triazol-1-ylmethyl)-benzene-κ4N:N1:N2:N3)disilver(I) diperchlorate
  13. The crystal structure of 1-(2-bromoethane)-4-amine-3,5-dinitropyrazole, C5H6Br1N5O4
  14. Crystal structure of (E)-1-(4-benzyl-3,5-dioxomorpholin-2-ylidene)ethyl acetate, C15H15N1O5
  15. The crystal structure of poly[diaqua-(μ2-1,2,4,5-tetrakis(1,2,4-triazol-1-ylmethyl)-benzene-κ2N:N′)-bis(μ3-terephthalato-κ3O:O′:O′′)dicadmium(II)], C17H15N6O5Cd
  16. Crystal structure of (E)-N′-(1-(5-chloro-2-hydroxyphenyl) ethylidene)thiophene-2-carbohydrazide, C13H11ClN2O2S
  17. The crystal structure of [(2,2′-bipyridine-k2 N,N)-bis(6-phenylpyridine-2-carboxylato-k2 N,O)cobalt(II)]-monohydrate, C36H26N4O5Co
  18. Crystal structure of (E)-N′-(2-chloro-6-hydroxybenzylidene)-3-hydroxybenzo-hydrazide monohydrate, C14H13ClN2O4
  19. Crystal structure of 1,1′-(methylene)bis(pyridin-1-ium) bis(1,2-dicyanoethene-1,2-dithiolato-κ2S:S)nickel(II), C42H30N14Ni2S8
  20. Crystal structure of 1,1′-(1,2-ethanediyl)bis(pyridin-1-ium) bis(1,2-dicyanoethene-1,2-dithiolato-κ2 S:S)nickel(II), C20H14N6NiS4
  21. The crystal structure of 1-methyl-1H-pyrazol-2-ium nitrate, C4H7O3N3
  22. The crystal structure of 4,4′-diselanediylbis(8-(hexyloxy)-3,6-dimethyl-1-(piperidin-1-yl)isoquinoline-7-carbonitrile), C46H60N6O2Se2
  23. The crystal structure of tris(6-methylpyridin-2-yl)phosphine selenide, C18H18N3PSe
  24. The crystal structure of 1,2-bis(2,4-dinitro-1H-imidazol-1-yl)ethane ─ acetone (1/1), C11H12N8O9
  25. Crystal structure of [diaqua[2,2′-(1,2-phenylene)bis(1H-imidazole-4-carboxylato-5-carboxy)-κ4N,N′,O,O′]nickel(II)] tetrahydrate, C16H12N4NiO10·4H2O
  26. The crystal structure of tris(4-methyl-1H-pyrazol-1-yl)methane, C13H16N6
  27. The crystal structure of 5,6-dichloro-2-(quinolin-8-yl)isoindoline-1,3-dione, C17H8Cl2N2O2
  28. Crystal structure of (E)-(2-methoxy-benzylidene)-(4-[1,2,4]triazol-1-yl-phenyl)-amine, C16H14N4O
  29. The crystal structure of (Z)-2-(4-(4-bromophenyl)thiazol-2-yl)-4-(3-hydroxybut-2-enoyl)-5-methyl -1,2-dihydro-3H-pyrazol-3-one – methanol (1/1), C18H18N3O4S
  30. Crystal structure of tetraaqua-tris(nitrato-κ2 O,O′) erbium(III) monohydrate, Er(NO3)3·5H2O, H10ErN3O14
  31. The crystal structure of 1-methyl-2-nitro-1H-imidazole 3-oxide, C4H5N3O3
  32. The crystal structure of 1-methyl-2-nitroimidazole, C4H5N3O2
  33. The crystal structure of 2-carboxyl-4-nitroimidazole monohydrate, C4H5N3O5
  34. Crystal structure of bis[hydrido-hexaphenylcarbodiphosphoran][tetra-trifluoromethyl-(μ-diiodo)-diplatinat]
  35. The crystal structure of poly[μ2-aqua- aqua-(μ3-(E)-2-(4-((2-carbamothioylhydrazineylidene)methyl)phenoxy)acetato-κ3 O:S:S)sodium(I)], C10H14N3O5SNa
  36. The twinned crystal structure of [4,4′-bipyridine]-1,1′-diium hexachloridostannate(IV), C10H10N2SnCl6
  37. The crystal structure of [(2,2′-bipyridine-k2 N,N)-bis(6-phenylpyridine-2-carboxylate-k2 N,O)copper(II)], C34H24N4O4Cu
  38. Crystal structure of trans-1,2-bis(pyridinium-4-yl) ethylene bis(2-carboxy-4-bromobenzoate) – water (1/4), C14H14BrNO6
  39. Crystal structure of poly[diaqua-(μ3-fumarato)-(μ3-maleato)-(μ4-1,2,4,5-tetrakis((1H-1,2,4-triazol-1-yl)methyl)benzene)tetracadmium(II)] dihydrate, C34H32N12O9Cd4
  40. Crystal structure of a second modification of Pachypodol, C18H16O7
  41. Crystal structure of methyl 2-(4-(2-(cyclopentyl-amino)-1-(N-(4-methoxyphenyl)-1-methyl-5-phenyl-1-H-pyrazole-3-carboxamido)-2-oxoethyl)phenyl)acetate, C34H36N4O5
  42. The crystal structure of catena-poly[(m2-4,4′-bipyridine-κ2 N:N)-bis(6-phenylpyridine-2-carboxylato-κ2 N,O) zinc(II)], C34H24N4O4Zn
  43. The crystal structure of hexaquamagnesium(II) (2,4-bis(nitroimino)-6-oxo-1,3,5-triazinane-1,3-diide), C3H15MgN7O12
  44. The crystal structure of 7-Bromo-2-(4-chloro-phenyl)-quinoxaline, C14H9BrClN2
  45. Crystal structure of methyl 4-{[4-(4-cyanobenzamido)phenyl]amino}benzofuro[2,3-d]pyrimidine-6-carboxylate, C26H17N5O4
  46. The crystal structure of (4SR)-7-(3,4-dichlorobenzyl)-4,8,8-trimethyl-7,8-dihydroimidazo[5,1c][1,2,4]triazine-3,6(2H,4H)-dione, C15H16Cl2N4O2
  47. Crystal structure of catena-poly[{μ2-3-carboxy-2,3-bis((4-methylbenzoyl)oxy)propanoato-κ2 O:O′}tris(methanol-κ1 O)lanthanum(III)], C63H63LaO27
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Heruntergeladen am 9.11.2025 von https://www.degruyterbrill.com/document/doi/10.1515/ncrs-2021-0455/html?lang=de
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