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Crystal structure of bis(ethyltriphenylphos-phonium) tetrabromidozincate(II), C40H40Br4P2Zn

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Zeitschrift für Kristallographie - New Crystal Structures
From the journal Zeitschrift für Kristallographie - New Crystal Structures Volume 230 Issue 4

Abstract

C40H40Br4P2Zn, monoclinic, Cc (no. 9), a = 12.2430(6) Å, b = 21.120(1) Å, c = 16.405(1) Å, β = 111.015(2)°, V = 3959.7 Å3, Z = 4, Rgt(F) = 0.0443, wRref(F2) = 0.1070, T = 200 K.

CCDC no.:: 1267/4340

Table 1

Data collection and handling.

Crystal:Colourless platelets, size
0.238×0.402×0.588 mm
Wavelength:Mo Kα radiation (0.71069 Å)
μ47.64 cm−1
Diffractometer, scan mode:Bruker APEX-II CCD, φ and ω
2θmax56.66°
N(hkl)measured, N(hkl)unique:16265, 8152
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 6546
N(param)refined:426
Programs:SHELX, WinGX, MERCURY,
PLATON [9–12]
Table 2

Atomic coordinates and displacement parameters (in Å2).

AtomSitexyzUiso
H(1A)4a0.20520.16990.22040.043
H(1B)4a0.13100.21000.13600.043
H(2A)4a−0.03740.19640.18000.077
H(2B)4a0.06370.24000.24450.077
H(2C)4a0.05050.16810.27010.077
H(12)4a0.21650.05300.27590.053
H(13)4a0.1869−0.01690.37560.063
H(14)4a0.0096−0.06670.34470.058
H(15)4a−0.1425−0.04700.21300.065
H(16)4a−0.11680.02610.11430.052
H(22)4a−0.04350.21550.03140.052
H(23)4a−0.20150.2344−0.09850.075
H(24)4a−0.29320.1491−0.18730.076
H(25)4a−0.23740.0462−0.14560.066
H(26)4a−0.08030.0253−0.01640.043
H(32)4a0.1746−0.01940.10090.046
H(33)4a0.3313−0.05410.06390.057
H(34)4a0.44840.01830.02700.059
H(35)4a0.40130.12410.01820.079
H(36)4a0.24890.15960.05700.074
H(3A)4a0.57220.28770.31730.042
H(3B)4a0.51950.34480.25100.042
H(4A)4a0.37500.27740.15770.083
H(4B)4a0.36990.27400.25370.083
H(4C)4a0.43050.21810.21940.083
H(42)4a0.62050.17580.30160.063
H(43)4a0.63690.06630.28950.075
H(44)4a0.67140.02390.17160.067
H(45)4a0.69410.08950.06540.065
H(46)4a0.68620.20040.07900.049
H(52)4a0.84850.23350.33180.068
H(53)4a1.02440.28010.41950.079
H(54)4a1.05810.38560.41030.071
H(55)4a0.91320.45010.31190.071
H(56)4a0.73630.40420.22490.057
H(62)4a0.75210.31130.08180.046
H(63)4a0.69610.3618−0.05350.050
H(64)4a0.50370.3983−0.12070.055
H(65)4a0.37530.3915−0.04730.049
H(66)4a0.42790.34070.08600.040

Source of material

The compound was prepared upon dissolving ZnBr2 in hot concentrated hydrobromic acid and subsequent addition of 2 equivalents of ethyltriphenylphosphonium bromide. Crystals suitable for the diffraction study were obtained upon slow cooling of the reaction mixture to room temperature.

Table 3

Atomic coordinates and displacement parameters (in Å2).

AtomSitexyzU11U22U33U12U13U23
P(1)4a0.0807(1)0.10394(8)0.1151(1)0.0244(8)0.0252(8)0.0260(8)−0.0010(7)0.0068(7)0.0023(7)
C(1)4a0.1260(6)0.1760(3)0.1761(4)0.042(4)0.022(3)0.041(4)0.003(3)0.013(3)−0.001(3)
C(2)4a0.0433(8)0.1970(4)0.2217(5)0.068(6)0.044(5)0.052(5)0.006(4)0.034(4)−0.003(4)
C(11)4a0.0513(6)0.0454(3)0.1852(4)0.037(4)0.028(3)0.027(3)0.002(3)0.011(3)0.005(3)
C(12)4a0.1427(7)0.0330(4)0.2632(5)0.054(5)0.038(4)0.037(4)−0.002(4)0.013(4)−0.002(3)
C(13)4a0.1251(8)−0.0086(4)0.3219(5)0.073(6)0.054(5)0.027(4)0.014(5)0.015(4)0.005(3)
C(14)4a0.0206(8)−0.0379(4)0.3039(5)0.075(6)0.036(4)0.052(5)0.007(4)0.044(5)0.006(3)
C(15)4a−0.0696(8)−0.0259(4)0.2262(6)0.049(5)0.060(5)0.066(6)0.001(4)0.035(5)0.016(4)
C(16)4a−0.0541(7)0.0168(3)0.1671(5)0.042(5)0.040(4)0.054(5)0.003(3)0.023(4)0.012(3)
C(21)4a−0.0451(5)0.1180(3)0.0196(4)0.014(3)0.039(4)0.026(3)−0.002(3)0.006(2)0.003(3)
C(22)4a−0.0823(6)0.1811(4)−0.0048(5)0.036(4)0.037(4)0.054(5)0.002(3)0.013(4)0.015(3)
C(23)4a−0.1755(7)0.1924(5)−0.0816(6)0.038(5)0.074(7)0.065(6)−0.002(4)0.006(4)0.028(5)
C(24)4a−0.2306(8)0.1414(5)−0.1337(6)0.049(5)0.096(8)0.041(5)−0.004(5)0.011(4)0.026(5)
C(25)4a−0.1968(6)0.0803(5)−0.1096(5)0.028(4)0.097(7)0.035(4)−0.027(4)0.006(3)−0.014(4)
C(26)4a−0.1038(6)0.0677(3)−0.0329(4)0.034(4)0.036(4)0.037(4)−0.001(3)0.013(3)−0.002(3)
C(31)4a0.1983(6)0.0747(3)0.0848(4)0.029(3)0.032(4)0.031(3)0.003(3)0.010(3)0.002(3)
C(32)4a0.2219(6)0.0103(3)0.0854(5)0.033(4)0.036(4)0.050(4)−0.003(3)0.019(3)−0.003(3)
C(33)4a0.3147(7)−0.0101(4)0.0632(5)0.042(5)0.037(4)0.059(5)0.011(4)0.014(4)0.002(4)
C(34)4a0.3830(7)0.0324(4)0.0403(5)0.030(4)0.062(5)0.058(5)0.003(4)0.017(4)−0.013(4)
C(35)4a0.3563(8)0.0946(4)0.0367(7)0.053(5)0.056(6)0.114(8)−0.001(4)0.061(6)0.013(5)
C(36)4a0.2654(8)0.1156(4)0.0592(6)0.074(7)0.042(5)0.090(7)0.011(4)0.054(6)0.016(4)
P(2)4a0.6382(2)0.28240(8)0.2022(1)0.0327(9)0.0302(9)0.0248(8)0.0038(7)0.0077(7)−0.0011(7)
C(3)4a0.5351(6)0.2986(3)0.2546(4)0.046(4)0.032(4)0.029(3)0.009(3)0.016(3)0.003(3)
C(4)4a0.4169(8)0.2639(4)0.2180(5)0.063(6)0.059(6)0.052(5)−0.008(4)0.031(4)0.010(4)
C(41)4a0.6509(6)0.1985(3)0.1916(4)0.036(4)0.027(3)0.030(3)0.004(3)0.006(3)−0.005(3)
C(42)4a0.6366(8)0.1586(4)0.2535(5)0.083(6)0.040(4)0.033(4)0.010(4)0.018(4)0.000(3)
C(43)4a0.6455(9)0.0935(4)0.2460(6)0.093(7)0.043(5)0.047(5)0.016(5)0.019(5)0.018(4)
C(44)4a0.6664(8)0.0685(4)0.1767(5)0.063(6)0.037(4)0.053(5)0.011(4)0.004(4)0.000(4)
C(45)4a0.6803(8)0.1074(4)0.1140(5)0.069(6)0.041(4)0.044(4)0.022(4)0.012(4)−0.006(4)
C(46)4a0.6744(7)0.1734(4)0.1213(4)0.047(5)0.042(4)0.031(4)0.007(3)0.011(3)−0.002(3)
C(51)4a0.7778(6)0.3152(3)0.2690(4)0.033(4)0.036(4)0.027(3)0.007(3)0.005(3)−0.013(3)
C(52)4a0.8617(8)0.2775(4)0.3273(5)0.069(6)0.047(5)0.043(5)0.006(5)0.006(4)−0.009(4)
C(53)4a0.9656(8)0.3055(5)0.3792(6)0.047(5)0.074(7)0.052(5)0.022(5)−0.011(4)−0.021(5)
C(54)4a0.9857(7)0.3677(5)0.3742(6)0.033(4)0.091(7)0.052(5)−0.011(5)0.014(4)−0.028(5)
C(55)4a0.9001(8)0.4061(4)0.3159(5)0.061(6)0.054(5)0.054(5)−0.021(5)0.013(5)−0.008(4)
C(56)4a0.7960(7)0.3787(4)0.2642(5)0.046(5)0.040(5)0.045(4)−0.002(4)0.004(4)−0.006(3)
C(61)4a0.5940(5)0.3211(3)0.0980(4)0.021(3)0.023(3)0.024(3)−0.003(2)0.002(2)0.001(2)
C(62)4a0.6748(6)0.3273(4)0.0554(4)0.031(4)0.047(5)0.035(4)0.003(3)0.010(3)−0.004(3)
C(63)4a0.6414(7)0.3569(3)−0.0250(5)0.049(5)0.041(4)0.045(4)−0.013(3)0.029(4)−0.001(3)
C(64)4a0.5278(8)0.3795(4)−0.0644(5)0.057(5)0.047(5)0.028(4)−0.005(4)0.009(4)0.004(3)
C(65)4a0.4518(7)0.3743(3)−0.0217(4)0.045(5)0.039(4)0.034(4)0.000(3)0.010(3)0.008(3)
C(66)4a0.4835(6)0.3447(3)0.0581(4)0.028(4)0.041(4)0.031(3)−0.001(3)0.011(3)0.001(3)
Br(1)4a0.53939(9)0.14306(5)0.63177(5)0.1036(8)0.0904(7)0.0399(5)−0.0531(6)0.0383(5)−0.0227(5)
Br(2)4a0.38753(7)0.13319(4)0.37717(5)0.0320(4)0.0672(6)0.0483(4)−0.0089(4)−0.0057(3)0.0132(4)
Br(3)4a0.67116(8)0.03790(4)0.48638(7)0.0589(5)0.0383(4)0.1019(7)0.0219(4)0.0461(5)0.0311(5)
Br(4)4a0.68262(6)0.22385(3)0.47960(4)0.0370(4)0.0340(4)0.0346(3)−0.0084(3)0.0096(3)−0.0003(3)
Zn(1)4a0.57156(6)0.13356(4)0.49705(4)0.0263(4)0.0322(4)0.0250(4)−0.0019(3)0.0052(3)0.0023(3)

Experimental details

Carbon-bound H atoms were placed in calculated positions (C–H 0.95 Å for aromatic and C–H 0.99 Å for methylene groups) and were included in the refinement in the riding model approximation, with Uiso(H) set to 1.2Ueq(C). The H atoms of the methyl groups were allowed to rotate with a fixed angle around the C–C bond to best fit the experimental electron density (HFIX 137 in the SHELX program suite [9]), with Uiso(H) set to 1.5Ueq(C).

Discussion

The crystallization of ionic compounds is strongly influenced by the relative spatial size ratio of anion to cation, and the presence of different anions may influence the conformation and metric parameters of the cation in the case of bigger, organic cations. At the beginning of a comprehensive study of the influence of various anions on bond lengths and angles among a series of tetraorgano phosphonium compounds, the title was synthesized. Crystal and molecular structures of several tetrachloridozincate(II) anions with tetraorganophosphonium counterions such as trimethylphenylphosphonium [1], methyltriphenylphosphonium [1] or tetraphenylphosphonium [2] as well as tetrabromidozincate(II) anions with tetraorganophosphonium counterions such as methyltriphenylphosphonium [3], tetraphenylphosphonium [2] or methylenebis(triethylphosphonium) [4] are apparent in the literature. The title compound is the bis(ethyltriphenylphosphonium) salt of tetrabromidozincate(II). The coordination sphere around the central atoms of the cations as well as of the anion are tetrahedral with the C–P–C angles covering a range of 107.7(3)–111.5(3)° in the first cation and 107.5(3)–111.4(3)° in the second cation with the smallest as well as the largest angle invariably enclosed between two aromatic moieties. The Br–Zn–Br angles are found in between 106.84(5)° and 113.28(5)°. The P–C bond lengths hardly differ in between the two cations and are found in a small margin of 1.784(6)–1.811(6) Å with the shortest and the longest value observed within the same catton. The Zn–Br distances measured values in between 2.3884(10) Å and 2.4179(10) Å. In comparison to other tetraorganophosphonium salts on the one hand and tetrabromidozincate(II) salts on the other hand whose metrical parameters have been deposited with the Cambridge Structural Database [5], these values are invariably in good agreement with the most common lengths observed for the respective bonds. The least-squares planes as defined by the non-hydrogen atoms of the phenyl groups entlose angles of 52.77(26)°, 70.25(26)° and 77.45(21)° in the first cation and 66.66(28)°, 68.11(26)° and 77.68(22)° in the second cation. In the crystal, C–H⋯Br contacts can be observed whose range falls below the sum of van-der- Waals radii of the atoms participating in them [6]. These are exclusively supported by one of the aromatic hydrogen atoms in ortho-position to the phosphorus atom as well as one of the hydrogen atoms of the methylene group in each of the two cations as donors but only two of the bromido ligands as acceptors. In terms of graph-set analysis [7, 8], the descriptor for these contacts is DDDD on the unary level. In total, the entities of the title compound are connected to chains along [101]. The shortest intercentroid distance between two centers of gravity of adjacent phenyl groups was measured at 4.564(5) Å.

Corresponding author: Richard Betz, Nelson Mandela Metropolitan University, Summerstrand Campus, Department of Chemistry, University Way, Summerstrand, PO Box 77000, Port Elizabeth 6031, South Africa, e-mail:

Acknowledgments:

The authors thank Mr David Rogers for helpful discussions.

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Received: 2015-2-28
Accepted: 2015-6-22
Published Online: 2015-9-26
Published in Print: 2015-12-1

©2015 Eric C. Hosten et al., published by De Gruyter

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

Articles in the same Issue

  1. Frontmatter
  2. Crystal structure of bis(ethyltriphenylphos-phonium) tetrabromidozincate(II), C40H40Br4P2Zn
  3. Crystal structure of chlorido-(2-ethoxy-6-(((quinolin-8-yl)methyl)-phenolato-κ3N,N′,O)-copper(II), C18H15ClCuN2O2
  4. Crystal structure of bis(ethyltriphenylphos-phonium) tetrabromidocobaltate(II), C40H40Br4CoP2
  5. Crystal structure of di(pyrrolidin-1-yl)methane-thione, C9H16N2S
  6. Crystal structure of ammonium phenylglyoxylate, C8H9NO3
  7. Crystal structure of 2-hydroxy-2-methyl-2-phenyl acetic acid hemihydrate, C9H11O3.50
  8. Crystal structure of 2-((E)-2-(1H-benzo[d]imidazol-2-yl)vinyl)-1H-benzo[d]imidazolium dichloride dihydrate, C16H18Cl2N4O2
  9. Crystal structure of 1,2-dimethylimidazolium iodide, C5H9IN2
  10. Crystal structure of catena-poly[(μ2-4,4′-bipyridine-κ2N:N′)-tetraqua-cobalt(II)] – (3-(carboxylatomethyl)benzoic acid) – water (1/2/2), C28H34CoN2O14
  11. Crystal structure of bis(2,2′-bipyridine-κ2N,N′)-bis(thiophene-3,4-dicarboxylato-κ2O,O′)-cadmium(II), C32H22CdN4O8S2
  12. Crystal structure of tetraaqua-(4,4′-diamino-1,1′-biphenyl-2,2′-disulfonato-κN)(4,4′-bipyridyl-κN)zinc(II) trihydrate, C22H32N4O13S2Zn
  13. Crystal structure of poly[[[(1,3-dimethyl-2-imidazolidinone-κ1O11) zinc(II)]-μ-1,4-benzenedi-carboxylato-κ4O1,O2:O3,O4]—1,3-dimethyl-2-imidazolidinone (1:1)], [Zn(C5H10N2O)(C8H4O4)]· C5H10N2O, C18H24N4O6Zn
  14. Crystal structure of poly[[(1,3-dimethyl-2-imidazolidinone-κ1O) zinc(II)]-μ-furan-2,5-dicarboxylato-κ4O,O′:O′′,O′′′], [Zn(C5H10N2O)(C6H2O5)], C22H24N4O12Zn2
  15. Crystal structure of catena-poly[(μ2-4,4′-bipyridine-κ2N:N′)-tetraquamanganese(II)] – (3-(carboxylatomethyl)benzoic acid) – water (1/2/2), C28H34MnN2O14
  16. Crystal structure of chlorido-tricarbonyl-bis(2-pyridylmethanone-N,N′)-rhenium(I), C14H8ClN2O4Re
  17. Crystal structure of (2-(benzoyl)phenolato-κ2O,O′)-trans-dichlorido -cis- bis(methoxido) niobium(V), C15H15Cl2NbO4
  18. Crystal structure of potassium diaqua dihydroxy(methylenediphosphonato-κ2-O,O′)cobaltate(III), CH10CoKO10P2
  19. Crystal structure of hexakis(4-(dimethylamino)pyridin-1-ium) decavanadate-water (1:16), C42H98N12O44V10
  20. Crystal structure of 4-diethylaminobenzaldehyde isonicotinoylhydrazone monohydrate, C17H20N4O·H2O, C17H22N4O2
  21. Crystal structure of bis[μ-1-[(2-ethyl-1H-imidazol-1-yl)methyl]-1H-benzotriazole-κ2N:N′]bis[dibromido]dimercury(II), C24H26Br4Hg2N10
  22. Crystal structure of poly{bis-[(4,4′-biphenyl-dicarboxylate-κ2O:O′)-μ-1,1′-oxy-bis-(ethane-2,1-diyl)-bis-(1H-imidazole)-κ2N:N′] zinc(II)}dihydrate, C48H48N8O12Zn2
  23. Crystal structure of sodium poly[(μ4-2,2′,2′′-nitrilotriacetato-κ4O,O′,O′′,N)magnesium(II)] monohydrate
  24. The crystal structure of 1-(2-(2-chloroethoxy)phenyl)ethanone
  25. The crystal structure of tris(μ2-1,3-bis(4,4,4-Trifluoro-3-oxido-1-(oxo)but-2-en-1-yl)phenyl-/κ4O,O′:O′′,O′′′)-bis(1,2-dimethoxyethane-O,O′)-diterbium(III)
  26. Crystal structure of (S)-2-(2,2′-diethoxy-[1,1′-binaphthalen]-6-yl)-4,4,5,5-tetra-methyl-2-imidazoline-1-oxyle, C31H33N2O3
  27. Crystal structure of cis-tetrachloridobis-(pyridine-κN)platinum(IV), C10H10Cl4N2Pt
  28. Crystal structure of catena-poly[aqua-(μ2-5-norbornene-2,3-dicarboxylato-κ3O,O′:O′′)-(1,10-phenanthroline-κ2N,N′)zinc(II)], [Zn(C9H8O4)(C12H8N2)(H2O)]n
https://doi.org/10.1515/ncrs-2014-0263
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Articles in the same Issue

  1. Frontmatter
  2. Crystal structure of bis(ethyltriphenylphos-phonium) tetrabromidozincate(II), C40H40Br4P2Zn
  3. Crystal structure of chlorido-(2-ethoxy-6-(((quinolin-8-yl)methyl)-phenolato-κ3N,N′,O)-copper(II), C18H15ClCuN2O2
  4. Crystal structure of bis(ethyltriphenylphos-phonium) tetrabromidocobaltate(II), C40H40Br4CoP2
  5. Crystal structure of di(pyrrolidin-1-yl)methane-thione, C9H16N2S
  6. Crystal structure of ammonium phenylglyoxylate, C8H9NO3
  7. Crystal structure of 2-hydroxy-2-methyl-2-phenyl acetic acid hemihydrate, C9H11O3.50
  8. Crystal structure of 2-((E)-2-(1H-benzo[d]imidazol-2-yl)vinyl)-1H-benzo[d]imidazolium dichloride dihydrate, C16H18Cl2N4O2
  9. Crystal structure of 1,2-dimethylimidazolium iodide, C5H9IN2
  10. Crystal structure of catena-poly[(μ2-4,4′-bipyridine-κ2N:N′)-tetraqua-cobalt(II)] – (3-(carboxylatomethyl)benzoic acid) – water (1/2/2), C28H34CoN2O14
  11. Crystal structure of bis(2,2′-bipyridine-κ2N,N′)-bis(thiophene-3,4-dicarboxylato-κ2O,O′)-cadmium(II), C32H22CdN4O8S2
  12. Crystal structure of tetraaqua-(4,4′-diamino-1,1′-biphenyl-2,2′-disulfonato-κN)(4,4′-bipyridyl-κN)zinc(II) trihydrate, C22H32N4O13S2Zn
  13. Crystal structure of poly[[[(1,3-dimethyl-2-imidazolidinone-κ1O11) zinc(II)]-μ-1,4-benzenedi-carboxylato-κ4O1,O2:O3,O4]—1,3-dimethyl-2-imidazolidinone (1:1)], [Zn(C5H10N2O)(C8H4O4)]· C5H10N2O, C18H24N4O6Zn
  14. Crystal structure of poly[[(1,3-dimethyl-2-imidazolidinone-κ1O) zinc(II)]-μ-furan-2,5-dicarboxylato-κ4O,O′:O′′,O′′′], [Zn(C5H10N2O)(C6H2O5)], C22H24N4O12Zn2
  15. Crystal structure of catena-poly[(μ2-4,4′-bipyridine-κ2N:N′)-tetraquamanganese(II)] – (3-(carboxylatomethyl)benzoic acid) – water (1/2/2), C28H34MnN2O14
  16. Crystal structure of chlorido-tricarbonyl-bis(2-pyridylmethanone-N,N′)-rhenium(I), C14H8ClN2O4Re
  17. Crystal structure of (2-(benzoyl)phenolato-κ2O,O′)-trans-dichlorido -cis- bis(methoxido) niobium(V), C15H15Cl2NbO4
  18. Crystal structure of potassium diaqua dihydroxy(methylenediphosphonato-κ2-O,O′)cobaltate(III), CH10CoKO10P2
  19. Crystal structure of hexakis(4-(dimethylamino)pyridin-1-ium) decavanadate-water (1:16), C42H98N12O44V10
  20. Crystal structure of 4-diethylaminobenzaldehyde isonicotinoylhydrazone monohydrate, C17H20N4O·H2O, C17H22N4O2
  21. Crystal structure of bis[μ-1-[(2-ethyl-1H-imidazol-1-yl)methyl]-1H-benzotriazole-κ2N:N′]bis[dibromido]dimercury(II), C24H26Br4Hg2N10
  22. Crystal structure of poly{bis-[(4,4′-biphenyl-dicarboxylate-κ2O:O′)-μ-1,1′-oxy-bis-(ethane-2,1-diyl)-bis-(1H-imidazole)-κ2N:N′] zinc(II)}dihydrate, C48H48N8O12Zn2
  23. Crystal structure of sodium poly[(μ4-2,2′,2′′-nitrilotriacetato-κ4O,O′,O′′,N)magnesium(II)] monohydrate
  24. The crystal structure of 1-(2-(2-chloroethoxy)phenyl)ethanone
  25. The crystal structure of tris(μ2-1,3-bis(4,4,4-Trifluoro-3-oxido-1-(oxo)but-2-en-1-yl)phenyl-/κ4O,O′:O′′,O′′′)-bis(1,2-dimethoxyethane-O,O′)-diterbium(III)
  26. Crystal structure of (S)-2-(2,2′-diethoxy-[1,1′-binaphthalen]-6-yl)-4,4,5,5-tetra-methyl-2-imidazoline-1-oxyle, C31H33N2O3
  27. Crystal structure of cis-tetrachloridobis-(pyridine-κN)platinum(IV), C10H10Cl4N2Pt
  28. Crystal structure of catena-poly[aqua-(μ2-5-norbornene-2,3-dicarboxylato-κ3O,O′:O′′)-(1,10-phenanthroline-κ2N,N′)zinc(II)], [Zn(C9H8O4)(C12H8N2)(H2O)]n
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