Startseite Crystal structure of europium dichromium icosaaluminum, EuCr2Al20
Artikel Open Access

Crystal structure of europium dichromium icosaaluminum, EuCr2Al20

  • Aylin Koldemir , Steffen Klenner und Rainer Pöttgen ORCID logo EMAIL logo
Veröffentlicht/Copyright: 8. März 2023
Artikel downloaden (PDF)
Veröffentlichen auch Sie bei De Gruyter Brill
Manuskript einreichen Informationen für Autor*innen
Zeitschrift für Kristallographie - New Crystal Structures
Aus der Zeitschrift Zeitschrift für Kristallographie - New Crystal Structures Band 238 Heft 3

Abstract

EuCr2Al20, cubic, F d 3 ‾ m (no. 227), a = 14.5245(7) Å, V = 3064.1(3) Å3, Z = 8, R gt (F) = 0.0351, wR ref (F 2) = 0.0402, T = 293 K.

CCDC no.: 2244988

The 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: Silvery irregular shape
Size: 0.04 × 0.06 × 0.08 mm
Wavelength: Mo Kα radiation (0.71073 Å)
μ: 6.31 mm−1
Diffractometer, scan mode: IPDS Stoe
θ max, completeness: 33.4°, 99%
N(hkl)measured, N(hkl)unique, R int: 16,086, 325, 0.119
Criterion for I obs, N(hkl)gt: I obs > 2σ(I obs), 267
N(param)refined: 18
Programs: X-Area [1], JANA2006 [2]
Table 2:

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

Atom x y z U iso*/U eq
Eu1a 0.125 0.125 0.125 0.00870 (8)
Cr1 0.5 0.5 0.5 0.00697 (12)
Al1 0.05861 (4) 0.05861 (4) 0.32600 (5) 0.01114 (17)
Al2 0.48756 (7) 0.125 0.125 0.0088 (2)
Al3 0 0 0 0.0225 (3)

  1. aOccupancy: 0.938 (5).

Cutout of the EuCr2Al20 structure. Chromium and aluminum atoms are drawn as blue and magenta circles, respectively. The condensation pattern of the Eu@Al16 and Cr@Al12 polyhedra is emphasized. The left-hand drawing shows the chromium substructure.

1 Source of material

The aluminum-rich phases EuT 2Al20 (T = Ti, V, Cr, Nb, Mo, Ta, W) were obtained by reaction of the elements using the aluminum self-flux technique [3]. Starting materials were europium ingots (American Elements, 99.99%), titanium (Strem Chemicals, 99.7%), chromium (Alfa Aesar, 99.95%), niobium (Alfa Aesar, 99.6%), molybdenum (Ventron, 99.9%), tantalum (Strem Chemicals, 99.98%) and tungsten (Strem Chemicals, 99.95%) powder, vanadium sheet (Alfa Aesar, 99.7%) and aluminum turnings (Koch Chemicals, 99.9%). The elements were mixed in the atomic ratios Eu:T:Al = 1:2:40, placed in alumina crucibles and sealed in evacuated silica ampoules. The mixtures were heated to 1120 K at a rate of 50 K/h, kept for 300 h and finally cooled to room temperature at a rate of 6 K/h. The excess aluminum was dissolved in diluted hydrochloric acid.

2 Experimental details

The phase purity of the polycrystalline products was investigated by means of powder X-ray diffraction (Enraf-Nonius FR552 Guinier camera, imaging plate detector, Fujifilm BAS-1800 read-out system, Cu-K α1 radiation and α-quartz (a = 491.30 and c = 540.46 pm) as an internal standard. The refined lattice parameter (1448.77(5) pm) agrees with the earlier study (1479.7(2) pm) [4]. EuCr2Al20 crystals were selected from the mechanically fragmented sample extracted from the aluminum flux. The crystal quality was tested through Laue photographs (Buerger camera, image plate detection system). Single crystal X-ray diffraction was performed at room temperature on a Stoe IPDS-II diffractometer (graphite monochromatized Mo- K α radiation; oscillation mode). A numerical absorption correction was applied. The starting atomic parameters were deduced with the charge-flipping algorithm [5] implemented in Superflip [6] and the structure was refined on F 2 with the Jana2006 software package [2], with anisotropic displacement parameters for all atoms. Separate refinement of the occupancy parameters indicated a small degree of defects for the 8a europium site. This occupancy parameter was refined as least-squares variable in the final cycles, leading to the composition Eu0.938(5)Cr2Al20 for the studied crystal. An EDX analyses of the crystal (5 ± 1% Eu: 11 ± 1% Cr: 84 ± 1% Al) confirmed the refined composition.

3 Comment

EuCr2Al20 crystallizes with the CeCr2Al20 type structure [7], space group F d 3 ‾ m (the so-called diamond space group). The single crystal data fully confirm the previous studies [4, 8] based on powder X-ray diffraction. Although the EuCr2Al20 unit cell is large and comprises 184 atoms, it can easily be described with a condensation pattern of two Frank–Kasper [9, 10] polyhedra. From a geometrical point of view, the substructure build up by the europium and chromium atoms corresponds to the MgCu2 type (cubic Laves phase). In the figure we present a cutout of the EuCr2Al20 structure. The left-hand part emphasizes the chromium substructure which consists of condensed Cr4 tetrahedra with 513 pm d (Cr–Cr). The cavities left by the tetrahedral network are filled by the europium atoms which are surrounded by 16 aluminum atoms (4× Al3 and 12× Al1, see Table 3). These Eu@Al16 polyhedra are condensed via common corners. The chromium atoms have 12 aluminum neighbors in icosahedral coordination and also these Cr@Al12 polyhedra (6× Al2 and 6× Al1) are condensed via common corners (right-hand part of the figure). The Cr–Al distances in the EuCr2Al20 structure range from 257 to 280 pm and are larger than the sum of the covalent radii of 243 pm for Cr + Al [11]. The three crystallographically independent aluminum atoms show a broader range of Al–Al distances (271–311 pm). These are comparable with fcc aluminum (12 × 286 pm) [12]. A comment is appropriate for the slight europium deficiency (93.8(5)%) observed from the refinement of the occupancy parameters. Such defects have been observed in few of the CeCr2Al20 type phases, e.g. 95.8(3%) praseodymium occupancy in PrV2Al20 [13]. Several of the CeCr2Al20 type phases have been studied with respect to rattling of the rare earth atom within the Al16 cage. Such anharmonic oscillations are favorable for thermoelectric materials, where suppression of the thermal conductivity enhances the thermoelectric efficiency.

Table 3:

Interatomic distances (/pm) in the first coordination spheres of europium and chromium.

Eu: 4 Al3 314.5 (1) Cr: 6 Al2 257.4 (1)
12 Al1 322.2 (1) 6 Al1 279.9 (1)

EuCr2Al20 and the isotypic aluminides EuT 2Al20 with T = Ti, V, Nb, Ta, Mo and W were studied by 151Eu Mössbauer spectroscopy at room temperature. The isomer shifts (Table 4) show a narrow range from −8.34(1) mm s−1 (EuCr2Al20) to −8.97(2) mm s−1 (EuW2Al20). The spectra gave no hint for any Eu(III) contribution. The isomer shift values are in the usual range observed for divalent europium intermetallics with pronounced covalent bonding. This is in close agreement with the magnetic behavior of these europium intermetallics [8, 14, 15]. The course of the isomer shifts shows no simple correlation with the valence electron count and the lattice parameter.

Table 4:

Fitting parameters for 151Eu Mössbauer spectra of aluminides EuT 2Al20. The measurements were carried out in transmission geometry with a 151Sm:EuF3 source at room temperature. δ = isomer shift, Γ = experimental line width. Due to the cubic site symmetry of europium, no quadrupole splitting occurs. The lattice parameters and the valence electron count are listed for comparison.

Compound δ/mm s−1 Γ/mm s−1 a/pm VEC
EuTi2Al20 −8.77 (1) 2.49 (3) 1472.26 (5) 70
EuV2Al20 −8.58 (1) 2.43 (3) 1454.92 (7) 72
EuNb2Al20 −8.94 (1) 2.55 (4) 1478.3 (2) 72
EuTa2Al20 −8.94 (2) 2.50 (6) 1477.27 (9) 72
EuCr2Al20 −8.34 (1) 2.53 (2) 1448.77 (5) 74
EuMo2Al20 −8.54 (1) 2.50 (3) 1460.56 (6) 74
EuW2Al20 −8.97 (2) 2.51 (6) 1459.81 (4) 74
Corresponding author: Rainer Pöttgen, Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster, Germany, E-mail:

Acknowledgements

We thank Dipl.–Ing. J. Kösters for the intensity data collection.

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

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

References

1. X-Area. The Stoe Single Crystal Diffraction Software Package; STOE & Cie GmbH: Darmstadt, Germany.Suche in Google Scholar

2. Petříček, V., Dušek, M., Palatinus, L. Crystallographic computing system JANA2006: general features. Z. Kristallogr. 2014, 229, 345–352; https://doi.org/10.1515/zkri-2014-1737.Suche in Google Scholar

3. Kanatzidis, M. G., Pöttgen, R., Jeitschko, W. The metal flux – a preparative tool for intermetallic compounds. Angew. Chem. Int. Ed. 2005, 44, 6996–7023; https://doi.org/10.1002/anie.200462170.Suche in Google Scholar PubMed

4. Manyako, M. B., Yahson, T. L., Zarechnyuk, O. S. Phase transformations in the Ca–V(Cr)–Al systems at 770 K. Russ. Metall. 1990, 2, 199–201.Suche in Google Scholar

5. Palatinus, L. The charge-flipping algorithm in crystallography. Acta Crystallogr. 2013, B69, 1–16; https://doi.org/10.1107/s0108768112051361.Suche in Google Scholar

6. Palatinus, L., Chapuis, G. SUPERFLIP – a computer program for the solution of crystal structures by charge flipping in arbitrary dimensions. J. Appl. Crystallogr. 2007, 40, 786–790; https://doi.org/10.1107/s0021889807029238.Suche in Google Scholar

7. Krypyakevych, P. I., Zarechnyuk, O. S. The RCr2Al20 compounds in the systems of the rare earth metals and calcium and their crystal structures. Dopov. Akad. Nauk Ukr. RSR Ser. A 1968, 364–367.Suche in Google Scholar

8. Thiede, V. M. T., Jeitschko, W., Niemann, S., Ebel, T. EuTa2Al20, Ca6W4Al43 and other compounds with CeCr2Al20 and Ho6Mo4Al43 type structures and some magnetic properties of these compounds. J. Alloys Compd. 1998, 267, 23–31; https://doi.org/10.1016/s0925-8388(97)00532-x.Suche in Google Scholar

9. Frank, F. C., Kasper, J. S. Complex alloy structures regarded as sphere packings. I. Definitions and basic principles. Acta Crystallogr. 1958, 11, 184–190; https://doi.org/10.1107/s0365110x58000487.Suche in Google Scholar

10. Frank, F. C., Kasper, J. S. Complex alloy structures regarded as sphere packings. II. Analysis and classification of representative structures. Acta Crystallogr. 1959, 12, 483–499; https://doi.org/10.1107/s0365110x59001499.Suche in Google Scholar

11. Emsley, J. The Elements; Oxford University Press: Oxford, 1999.Suche in Google Scholar

12. Donohue, J. The Structures of the Elements; Wiley: New York, 1974.Suche in Google Scholar

13. Okuyama, D., Tsujimoto, M., Sagayama, H., Shimura, Y., Sakai, A., Magata, A., Nakatsuji, S., Sato, T. J. Crystal structure in quadrupolar Kondo candidate PrTr2Al20 (Tr = Ti and V). J. Phys. Soc. Jpn. 2019, 88, 015001; https://doi.org/10.7566/jpsj.88.015001.Suche in Google Scholar

14. Swatek, P., Kaczorowski, D. Magnetic properties of EuCr2Al20. J. Magn. Magn. Mater. 2016, 416, 348–352; https://doi.org/10.1016/j.jmmm.2016.04.086.Suche in Google Scholar

15. Ramesh Kumar, K., Nair, H. S., Bhattacharyya, A., Thamizhavel, A., Strydom, A. M. Metamagnetism, sign reversal and low temperature magnetocaloric effect in single-crystalline EuV2Al20. J. Magn. Magn. Mater. 2018, 452, 205–209; https://doi.org/10.1016/j.jmmm.2017.12.066.Suche in Google Scholar
Received: 2023-02-06
Accepted: 2023-02-27
Published Online: 2023-03-08
Published in Print: 2023-06-27

© 2023 the author(s), 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 phenyl(3,3-dichloro-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one)methanone, C7H4Cl2N2O
  4. Crystal structure of poly[diaqua-bis(μ 2-1,4-diaminobutane-N:N′)cobalt(II)] dichloride, C8H28Cl2CoN4O2
  5. Synthesis and crystal structure of (4aR,7S)-7-hydroxy-7-isopropyl-1,1-dimethyldecahydro-2H,6H-8a,4a-(epoxymethano)phenanthren-12-one, C20H32O3
  6. The crystal structure of 1-(2-chlorobenzyl)-3-(3,5-dichlorophenyl)urea, C14H11Cl3N2O
  7. Crystal structure of tetrapropylammonium-1,3,5-thiadiazole-5-amido-2-carbamate – 1,2,4-thiadiazole-3,5-diamine – water (1/1/1), C17H37N9O3S2
  8. Tetrabutylammonium 1,3,5-thiadiazole-5-amido-2-carbamate—1,2,4-thiadiazole-3,5-diamine— water (1/1/1), C21H45N9O3S2
  9. The crystal structure of ((E)-2,4-dichloro-6-(((2-hydroxy-5-nitrophenyl)imino)methyl)phenolato-κ 3 N,O,O′)tris(pyridine-κN)manganese(II), C28H21Cl2MnN5O4
  10. The crystal structure of aqua-bis{2-bromo-6-((2-(2-phenylacetyl)hydrazineylidene)methyl)phenolato-κ3 N,O,O′}-dimethylformamide-κ1 O-erbium(III) chloride – dimethylformamide – water (1/2/1), C39H49N7O9Br2ClEr
  11. Crystal structure of (diaqua-bis(phenanthroline-K 2 N,N′)-tetrakis(m 2-3,4,5,6-tetrafluorophthalato-K 4 O,O:O′:O″;K 2 O:O′)dierbium (III) phenanthroline (1/2), C80H38Er2F16N8O18
  12. Crystal structure of (E)-7-methoxy-2-(4-methoxy-2-(trifluoromethyl)benzylidene)-3,4-dihydronaphthalen-1(2H)-one, C20H17F3O3
  13. The crystal structure of 4–(4,4,5,5–tetramethyl–1,3,2–dioxaborolan–2–yl)morpholine, C10H20BNO3
  14. The crystal structure of catena–poly[aqua(1-naphthoato-κ 2 O,O′)-(μ-1-naphthoato-κ 4 O:O,O′:O′)lead(II)], C22H16O5Pb
  15. The crystal structure of 1-(4-chlorophenyl)-3-cycloheptylurea, C14H19ClN2O
  16. The crystal structure of 4-(pyren-1-yl)butyl-4-nitrobenzoate, C27H21NO4
  17. Crystal structure of cyclo-(bis(µ2-3,3′-(1H-imidazole-3-ium-1,3-diyl)dipropionato-κ4 O,O′:O″,O″′)-dinitrato-κ2 O,O′-tetraoxido-diuranium(VI) C18H22N6O18U2
  18. The crystal structure of catena-[nitrato-κ 2 O,O′-(μ 3-3-iodobenzene-1,2-dicarboxylato-κ 4 O:O′:O″,O‴)-(2,2′:6′,2″-terpyridine-κ 3 N,N′,N″)lanthanum(III)], C23H14IN4O7La
  19. Redetermination of crystal structure of [bis(pyridin-2-ylmethyl)amine-κ 3 N,Nʹ,Nʺ]chloridopalladium(II) chloride monohydrate
  20. Crystal structure of catena-poly[triaqua-[bis(m2-4-(1H-1,2,4-triazol-1-yl)benzoato-k2O:O')-(4-(1H-1,2,4-triazol-1-yl)benzoato-k1O)-praseodymium (III) monohydrate], C27H26N9O10Pr
  21. Crystal structure of trans-diaqua-bis(methyl methylcarbamohydrazonothioato-κ2 N,N′) nickel(II) iodide semihydrate, C6H22N6O2NiS2I2·0.5H2O
  22. The crystal structure of 2-(2-fluoro-4-methyl-5-((2,2,2-trifluoroethyl)thio)phenyl)isoindolin-1-one, C17H13F4NOS
  23. The crystal structure of di-μ-1-naphthylacetato-κ 3 O,O′:O;κ 3 O:O,O′-bis[(1-naphthylacetato-κ 2 O,O′)(2,2′-bipyridine-κ 2 N,N′)lead(II)] monohydrate, C68H54N4O9Pb2
  24. Crystal structure of tetrapropylammonium guanidinium 4,4′-sulfonyldibenzoate monohydrate, C27H44N4O7S
  25. Crystal structure of bis(tetrapropylammonium) terephthalate – 1-(diaminomethylene)thiourea – water (1/2/4) C18H40N5O4S
  26. Crystal structure of (E)-7-fluoro-2-(4-morpholinobenzylidene)-3,4-dihydronaphthalen-1(2H)-one, C21H20FNO2
  27. The crystal structure of poly[diaqua-bis(μ 3-5-bromobenzene-1,3-dicarboxylato-κ 3 O,O,O′)-(μ 2-1,3-bis-(4-pyridyl)-propane-κ 2 N,N′)-dizinc(II))] – 5-bromobenzene-1,3-dicarboxylic acid [2/1], C37H29Br3N2O14Zn2
  28. The crystal structure of 2-bromo-1,3-phenylene bis(4-methylbenzenesulfonate), C20H17BrO6S2
  29. Crystal structure of europium dichromium icosaaluminum, EuCr2Al20
  30. The crystal structure of N′1,N′3-di((E)-benzylidene) isophthalohydrazide dihydrate, C 22 H 22 N 4 O 4
  31. Crystal structure of 7α,11α-dihydroxy-15-oxo-ent-kauran-16-en-19,6β-olide, C20H26O5
  32. Crystal structure of 4-chloro-N′-[(1E)-pyridin-3-ylmethylidene]benzohydrazide, C13H10ClN3O
  33. The crystal structure of (Z)-3-(1-(2-((E)-4-isopropylbenzylidene)hydrazinyl)ethylidene) chroman-2,4-dione, C21H20N2O3
  34. Crystal structure of E-7-fluoro-2-(2-(trifluoromethyl)benzylidene)-3,4-dihydronaphthalen-1(2H)-one, C18H12F4O
  35. Crystal structure of bis(6-aminopyridine-2-carboxylato–k2O,N)-bis(N,N-dimethylformamide-k1 O)zinc(II), C18H24N6O6Zn
  36. Crystal structure of 5-(adamantan-1-yl)-3-[(4-{[2-(trifluoromethyl)phenyl]-methyl}piperazin-1-yl)methyl]-1,3,4-oxadiazole-2(3H)-thione, C25H31F3N4OS
  37. Crystal structure of tetrapropylammonium bicarbonate–1-(diaminomethylene)thiourea – water (2/2/1), C30H72N10O7S2
  38. Crystal structure of tris(2,2′-bipyridine-κ2 N,N′)iron(II) triiodide – dichloromethane (2/1), C61H50Cl2Fe2I12N12
  39. Crystal structure of 2-amino-3-[2-(1,3,3-trimethyl-1,3-dihydro-indol-2-ylidene)-ethylideneamino]-but-2-enedinitrile, C17H17N5
  40. The crystal structure of 1-(2-chlorophenyl)-3-cycloheptylurea, C14H19ClN2O
  41. Crystal structure of potassium bis(pentaselenido-κ 2 Se 1,Se 5)palladate(II), K2[Pd(Se5)2]
  42. The crystal structure of 5,10-bis(2-methoxyethyl)-5,10-dihydro-[1,2,3,4]tetrathiocino[5,6-b:8, 7-b′]diindole, C22H22N2O2S4
  43. The crystal structure of 4-(4-iodophenyl)-5H-1,2,3-dithiazole-5-thione, C8H4INS3
  44. Crystal structure of bis{μ2-(4-acetyl-phenoxy)acetato-κ2 O:O′}-bis{μ2-(4-acetyl-phenoxy)acetato-κ3 O,O′:O)- bis{(4-acetyl-phenoxy)acetato-κ2 O,O′}-bis(phenanthrolin-κ2 N,N′)didysprosium(III) tetrahydrate, C84H78N4O28Dy2
  45. Crystal structure of Eu2Pd3.37(1)Zn13.63(1)
  46. Crystal structure of 2-methoxy-4-(methoxy-carbonyl)phenyl 2-chloro-4-fluorobenzoate, C16H12ClFO5
  47. Crystal structure of catena-poly[bis(μ2-dicyanamide-κ2 N:N′)-bis(4-vinylpyridine-κN)-copper(II)], C18H14CuN8
  48. The crystal structure of iguratimod-dimethylformamide (1/1), C17H14N2O6S·C3H7NO
  49. Synthesis and crystal structure of 1-((3R,10S,13S,17S)-10,13-dimethyl-3-(m-tolylamino)hexadecahydro-1H-cyclopenta[α]phenanthren-17-yl)ethan-1-one, C28H41NO
  50. The crystal structure of diaqua-bis(4-bromo-2-formylphenoxy)zinc(II), C14H12Br2O6Zn
  51. The crystal structure of tetra(1-ethylimidazole-κ 1 N)-[μ 4-imidazole-4,5-dicarboxylato-κ 4 O, N, O′, N′]-trioxido-divanadium, C25H33N10O7V2
  52. The crystal structure of (E)-N′-(1-(4-fluorophenyl)propylidene)-2-hydroxybenzohydrazide, C16H15FN2O2
https://doi.org/10.1515/ncrs-2023-0054
Creative Commons
BY 4.0

Artikel in diesem Heft

  1. Frontmatter
  2. New Crystal Structures
  3. Crystal structure of phenyl(3,3-dichloro-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one)methanone, C7H4Cl2N2O
  4. Crystal structure of poly[diaqua-bis(μ 2-1,4-diaminobutane-N:N′)cobalt(II)] dichloride, C8H28Cl2CoN4O2
  5. Synthesis and crystal structure of (4aR,7S)-7-hydroxy-7-isopropyl-1,1-dimethyldecahydro-2H,6H-8a,4a-(epoxymethano)phenanthren-12-one, C20H32O3
  6. The crystal structure of 1-(2-chlorobenzyl)-3-(3,5-dichlorophenyl)urea, C14H11Cl3N2O
  7. Crystal structure of tetrapropylammonium-1,3,5-thiadiazole-5-amido-2-carbamate – 1,2,4-thiadiazole-3,5-diamine – water (1/1/1), C17H37N9O3S2
  8. Tetrabutylammonium 1,3,5-thiadiazole-5-amido-2-carbamate—1,2,4-thiadiazole-3,5-diamine— water (1/1/1), C21H45N9O3S2
  9. The crystal structure of ((E)-2,4-dichloro-6-(((2-hydroxy-5-nitrophenyl)imino)methyl)phenolato-κ 3 N,O,O′)tris(pyridine-κN)manganese(II), C28H21Cl2MnN5O4
  10. The crystal structure of aqua-bis{2-bromo-6-((2-(2-phenylacetyl)hydrazineylidene)methyl)phenolato-κ3 N,O,O′}-dimethylformamide-κ1 O-erbium(III) chloride – dimethylformamide – water (1/2/1), C39H49N7O9Br2ClEr
  11. Crystal structure of (diaqua-bis(phenanthroline-K 2 N,N′)-tetrakis(m 2-3,4,5,6-tetrafluorophthalato-K 4 O,O:O′:O″;K 2 O:O′)dierbium (III) phenanthroline (1/2), C80H38Er2F16N8O18
  12. Crystal structure of (E)-7-methoxy-2-(4-methoxy-2-(trifluoromethyl)benzylidene)-3,4-dihydronaphthalen-1(2H)-one, C20H17F3O3
  13. The crystal structure of 4–(4,4,5,5–tetramethyl–1,3,2–dioxaborolan–2–yl)morpholine, C10H20BNO3
  14. The crystal structure of catena–poly[aqua(1-naphthoato-κ 2 O,O′)-(μ-1-naphthoato-κ 4 O:O,O′:O′)lead(II)], C22H16O5Pb
  15. The crystal structure of 1-(4-chlorophenyl)-3-cycloheptylurea, C14H19ClN2O
  16. The crystal structure of 4-(pyren-1-yl)butyl-4-nitrobenzoate, C27H21NO4
  17. Crystal structure of cyclo-(bis(µ2-3,3′-(1H-imidazole-3-ium-1,3-diyl)dipropionato-κ4 O,O′:O″,O″′)-dinitrato-κ2 O,O′-tetraoxido-diuranium(VI) C18H22N6O18U2
  18. The crystal structure of catena-[nitrato-κ 2 O,O′-(μ 3-3-iodobenzene-1,2-dicarboxylato-κ 4 O:O′:O″,O‴)-(2,2′:6′,2″-terpyridine-κ 3 N,N′,N″)lanthanum(III)], C23H14IN4O7La
  19. Redetermination of crystal structure of [bis(pyridin-2-ylmethyl)amine-κ 3 N,Nʹ,Nʺ]chloridopalladium(II) chloride monohydrate
  20. Crystal structure of catena-poly[triaqua-[bis(m2-4-(1H-1,2,4-triazol-1-yl)benzoato-k2O:O')-(4-(1H-1,2,4-triazol-1-yl)benzoato-k1O)-praseodymium (III) monohydrate], C27H26N9O10Pr
  21. Crystal structure of trans-diaqua-bis(methyl methylcarbamohydrazonothioato-κ2 N,N′) nickel(II) iodide semihydrate, C6H22N6O2NiS2I2·0.5H2O
  22. The crystal structure of 2-(2-fluoro-4-methyl-5-((2,2,2-trifluoroethyl)thio)phenyl)isoindolin-1-one, C17H13F4NOS
  23. The crystal structure of di-μ-1-naphthylacetato-κ 3 O,O′:O;κ 3 O:O,O′-bis[(1-naphthylacetato-κ 2 O,O′)(2,2′-bipyridine-κ 2 N,N′)lead(II)] monohydrate, C68H54N4O9Pb2
  24. Crystal structure of tetrapropylammonium guanidinium 4,4′-sulfonyldibenzoate monohydrate, C27H44N4O7S
  25. Crystal structure of bis(tetrapropylammonium) terephthalate – 1-(diaminomethylene)thiourea – water (1/2/4) C18H40N5O4S
  26. Crystal structure of (E)-7-fluoro-2-(4-morpholinobenzylidene)-3,4-dihydronaphthalen-1(2H)-one, C21H20FNO2
  27. The crystal structure of poly[diaqua-bis(μ 3-5-bromobenzene-1,3-dicarboxylato-κ 3 O,O,O′)-(μ 2-1,3-bis-(4-pyridyl)-propane-κ 2 N,N′)-dizinc(II))] – 5-bromobenzene-1,3-dicarboxylic acid [2/1], C37H29Br3N2O14Zn2
  28. The crystal structure of 2-bromo-1,3-phenylene bis(4-methylbenzenesulfonate), C20H17BrO6S2
  29. Crystal structure of europium dichromium icosaaluminum, EuCr2Al20
  30. The crystal structure of N′1,N′3-di((E)-benzylidene) isophthalohydrazide dihydrate, C 22 H 22 N 4 O 4
  31. Crystal structure of 7α,11α-dihydroxy-15-oxo-ent-kauran-16-en-19,6β-olide, C20H26O5
  32. Crystal structure of 4-chloro-N′-[(1E)-pyridin-3-ylmethylidene]benzohydrazide, C13H10ClN3O
  33. The crystal structure of (Z)-3-(1-(2-((E)-4-isopropylbenzylidene)hydrazinyl)ethylidene) chroman-2,4-dione, C21H20N2O3
  34. Crystal structure of E-7-fluoro-2-(2-(trifluoromethyl)benzylidene)-3,4-dihydronaphthalen-1(2H)-one, C18H12F4O
  35. Crystal structure of bis(6-aminopyridine-2-carboxylato–k2O,N)-bis(N,N-dimethylformamide-k1 O)zinc(II), C18H24N6O6Zn
  36. Crystal structure of 5-(adamantan-1-yl)-3-[(4-{[2-(trifluoromethyl)phenyl]-methyl}piperazin-1-yl)methyl]-1,3,4-oxadiazole-2(3H)-thione, C25H31F3N4OS
  37. Crystal structure of tetrapropylammonium bicarbonate–1-(diaminomethylene)thiourea – water (2/2/1), C30H72N10O7S2
  38. Crystal structure of tris(2,2′-bipyridine-κ2 N,N′)iron(II) triiodide – dichloromethane (2/1), C61H50Cl2Fe2I12N12
  39. Crystal structure of 2-amino-3-[2-(1,3,3-trimethyl-1,3-dihydro-indol-2-ylidene)-ethylideneamino]-but-2-enedinitrile, C17H17N5
  40. The crystal structure of 1-(2-chlorophenyl)-3-cycloheptylurea, C14H19ClN2O
  41. Crystal structure of potassium bis(pentaselenido-κ 2 Se 1,Se 5)palladate(II), K2[Pd(Se5)2]
  42. The crystal structure of 5,10-bis(2-methoxyethyl)-5,10-dihydro-[1,2,3,4]tetrathiocino[5,6-b:8, 7-b′]diindole, C22H22N2O2S4
  43. The crystal structure of 4-(4-iodophenyl)-5H-1,2,3-dithiazole-5-thione, C8H4INS3
  44. Crystal structure of bis{μ2-(4-acetyl-phenoxy)acetato-κ2 O:O′}-bis{μ2-(4-acetyl-phenoxy)acetato-κ3 O,O′:O)- bis{(4-acetyl-phenoxy)acetato-κ2 O,O′}-bis(phenanthrolin-κ2 N,N′)didysprosium(III) tetrahydrate, C84H78N4O28Dy2
  45. Crystal structure of Eu2Pd3.37(1)Zn13.63(1)
  46. Crystal structure of 2-methoxy-4-(methoxy-carbonyl)phenyl 2-chloro-4-fluorobenzoate, C16H12ClFO5
  47. Crystal structure of catena-poly[bis(μ2-dicyanamide-κ2 N:N′)-bis(4-vinylpyridine-κN)-copper(II)], C18H14CuN8
  48. The crystal structure of iguratimod-dimethylformamide (1/1), C17H14N2O6S·C3H7NO
  49. Synthesis and crystal structure of 1-((3R,10S,13S,17S)-10,13-dimethyl-3-(m-tolylamino)hexadecahydro-1H-cyclopenta[α]phenanthren-17-yl)ethan-1-one, C28H41NO
  50. The crystal structure of diaqua-bis(4-bromo-2-formylphenoxy)zinc(II), C14H12Br2O6Zn
  51. The crystal structure of tetra(1-ethylimidazole-κ 1 N)-[μ 4-imidazole-4,5-dicarboxylato-κ 4 O, N, O′, N′]-trioxido-divanadium, C25H33N10O7V2
  52. The crystal structure of (E)-N′-(1-(4-fluorophenyl)propylidene)-2-hydroxybenzohydrazide, C16H15FN2O2
Jetzt anmelden und 20% sparen
Institutioneller Zugang
Wie funktioniert Authentifizierung?
Haben Sie eine Idee, wie wir unsere Website verbessern können?
Bitte schreiben Sie uns.
© 2025 De Gruyter Brill
Heruntergeladen am 15.11.2025 von https://www.degruyterbrill.com/document/doi/10.1515/ncrs-2023-0054/html
Button zum nach oben scrollen