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Crystal structure of di-glycylglycinium squarate dihydrate, C12H22N4O12, at 105 K

  • Etelvina de Matos Gomes , Rosa M.F. Baptista and Carl Henrik Görbitz ORCID logo EMAIL logo
Published/Copyright: November 27, 2024
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Zeitschrift für Kristallographie - New Crystal Structures
From the journal Zeitschrift für Kristallographie - New Crystal Structures Volume 240 Issue 1

Abstract

C12H22N4O12, triclinic, P 1 ‾ (no. 2), a = 6.7126(4) Å, b = 7.7536(5) Å, c = 8.5279(5) Å, α = 89.4803(14)°, β = 86.2595(14)°, γ = 79.4035(14)°, V = 435.35(5) Å3, Z = 2, R gt (F) = 0.0323, wR ref (F 2) = 0.0908, T = 105(2) K.

CCDC no.: 2391129

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: 0.50 × 0.37 × 0.25 mm
Wavelength: Mo Kα radiation (0.71073 Å)
μ: 0.14 mm−1
Diffractometer, scan mode: Bruker D8 Advance, 0.5° ω scans
θ max, completeness: 38.6°, 99 %
N(hkl)measured, N(hkl)unique, R int: 30,177, 4,931, 0.026
Criterion for I obs, N(hkl)gt: I obs > 2σ(I obs), 4,428
N(param)refined: 137
Programs: Bruker 1 , SHELX 2 , 4 , Mercury 3
Table 2:

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

Atom x y z U iso*/U eq
O1A 0.69907 (7) 0.85381 (5) 0.39941 (5) 0.01125 (7)
O2A 0.51197 (7) 0.64261 (6) 0.15892 (5) 0.01292 (8)
H5A 0.4279 (19) 0.6904 (16) 0.0841 (14) 0.019*
O3A 0.73968 (7) 0.69650 (7) −0.03058 (5) 0.01443 (8)
N1A 0.55260 (7) 0.84048 (6) 0.69811 (5) 0.00983 (8)
H1A 0.484619 0.819361 0.790034 0.015*
H2A 0.464275 0.903542 0.633218 0.015*
H3A 0.651114 0.902291 0.717911 0.015*
N2A 0.79888 (7) 0.56010 (6) 0.37172 (5) 0.00914 (7)
H4A 0.812079 0.456353 0.416655 0.011*
C1A 0.64619 (9) 0.67246 (7) 0.62226 (6) 0.01024 (8)
H11A 0.546072 0.593209 0.623768 0.012*
H12A 0.763036 0.615284 0.680798 0.012*
C2A 0.71728 (8) 0.70464 (6) 0.45413 (6) 0.00779 (8)
C3A 0.86521 (8) 0.57538 (7) 0.20843 (6) 0.00978 (8)
H31A 0.934470 0.458231 0.169757 0.012*
H32A 0.966443 0.653716 0.201202 0.012*
C4A 0.69795 (8) 0.64535 (7) 0.10085 (6) 0.00902 (8)
O1B 0.09505 (6) 1.01529 (6) 0.25256 (5) 0.01028 (7)
O2B 0.26898 (6) 0.77560 (6) −0.05380 (5) 0.01128 (7)
C2B 0.12142 (8) 0.89921 (7) −0.02392 (6) 0.00799 (8)
C1B 0.04255 (8) 1.00681 (7) 0.11446 (6) 0.00768 (8)
O1W 0.81913 (7) 0.21149 (6) 0.47676 (5) 0.01323 (8)
H1W 0.8997 (19) 0.1431 (16) 0.4106 (14) 0.020*
H2W 0.8297 (19) 0.1579 (16) 0.5672 (14) 0.020*

1 Source of materials

Glycylglycine (Gly–Gly) and 3,4-dihydroxy-3-cyclobutene-1,2-dione (squaric acid) were purchased from Alfa Aesar chemicals and used without further purification. Crystals of the title salt were prepared by completely dissolving separately, in hot water, 1.0 g of squaric acid and 2.3 g of Gly–Gly, in a 1:2 molecular ratio. After complete dissolution the parts were mixed together. The solution was left to crystallize at room temperature by slow evaporation over a period of several weeks.

2 Experimental details

Singel crystal data collection, cell refinement, data reduction and structure solution was executed with APEX2 1 and structure refinement with SHELXT. 2 The illustration was prepared by Mercury 3 while material for publication was prepared by SHELXL. 4 Coordinates were refined for hydroxyl and water H atoms, other H atoms were positioned with idealized geometry and treated as riding atoms, allowing free rotation for the amino group.

3 Comment

Squaric acid is a planar hydrogen-bonded molecular compound belonging to the class of antiferroelectric crystals at room temperature. 5 , 6 , 7 , 8 It has the ability to crystallize either as a squarate dianion ( C 4 O 4 2 − ) or a hydrogen squarate anion ( H C 4 O 4 − ) and is of great interest in crystal engineering studies. 9 Non-centrosymmetric crystal structures with chiral amino acid cations have been synthesized and are attractive for non-linear optical and electro-optic applications. 10 , 11 There are no previous crystal structure determinations of dipeptide squarate salts; to the best of our knowledge, only molecular spectroscopic studies of glycylalanine and alanylalanine hydrogen squarate have been reported. 12 This work represents the first effort to study complexes between a dipeptide and squaric acid. In the future, we intend to engineer more salts with acentric structures that could display interesting properties, such as ferroelectricity, similar to diglycine nitrate. 13

The illustration shows the asymmetric unit (with black bonds), a neighbouring glycylglicinium anion (in pale colours) at 1 – x, 2 – y, 1 – z generated by inversion symmetry, and the second half of the squarate dianion (in pale colours) at –x, 2 – y, –z also generated by inversion. Hydrogen bond acceptor atoms appear in pale colours with symmetry operations indicated, while atom labels for donated H atoms appear in grey without symmetry codes. The pertinent centres-of symmetry at (0.5 1 0.5) and (0 1 0), respectively, have been highlighted as green spheres. The grey shade shows the 10-membered ring system associated with formation of the glycylglycinium dimer, involving two amino⋯carbonyl interactions. Formation of similar dimers has been observed for a handful of zwitterionic dipeptides, but is more common when the C-terminal does not carry a negative charge, in which case it is a less attractive acceptor for the amino H atoms. By comparison, out of the 18 distinct structures in the Cambridge Structural Database (CSD) 14 containing the glycylglycine cation, five have similar dimers, but only in the 2,6-naphtalenedisulfonate dihydrate 15 are the two partners related by a centre-of-inversion like here.

Squarate dianions occur in 84 unique metal-free entries in the CSD, 13 in Sohncke space groups, 3 in non-centrosymmetric non-Sohncke space groups and 68 in centrosymmetric space groups. In the latter, the squarate is, like here, located on a centre-of-inversion in 73.5 % of the structures. If only contacts with H⋯O distances shorter than 2.4 Å are included, the number of hydrogen atoms accepted by squarate in the present structure, 10, is also the maximum number encountered in the CSD. Illustrations of the hydrogen bonding pattern are provided as Supplementary Material.

To check for phase transitions, diffraction data were also collected at room temperature, 294 K (CCDC 2391122). The best possible overlay of the refined structures at 105 and 294 K gives a root-mean-square deviation of just 0.028 Å, indicating no major changes with shifting temperature.

Corresponding author: Carl Henrik Görbitz, Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway, E-mail:

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

  2. Research funding: National funds (OE) through Fundação para a Ciência e a Tecnologia (framework contract under the Decree-Law 57/2016, Law 57/2017) and FEDER (European Fund for Regional Development)-COMPETE-QREN-EU (ref. UID/FIS/04650/2013 and UID/FIS/04650/2019).

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

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Supplementary Material

This article contains supplementary material (https://doi.org/10.1515/ncrs-2024-0416).

Received: 2024-10-21
Accepted: 2024-11-14
Published Online: 2024-11-27
Published in Print: 2025-02-25

© 2024 the author(s), published by De Gruyter, Berlin/Boston

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

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  1. Frontmatter
  2. New Crystal Structures
  3. Crystal structure of the co-crystal 2,4,6-triamino-1,3,5-triazine-1,3-dioxide — acetic acid (1/2) C7H14N6O6
  4. Crystal structure of the dinuclear mercury(II) complex bis(μ2-bromido)-dibromido-bis{1-[(benzotriazol-1-yl)methyl]-1-H-1,3-(2-ethyl-5-methyl-imidazol)-κ1 N} dimercury(II), C26H30N10Hg2Br4
  5. Crystal structure of poly[hexaqua-pentakis(μ4-2,2′-bipyridine-4,4′-dicarboxylato-κ4 O:O′:O″:O‴)-(μ2-2,2′-bipyridine-4,4′-dicarboxylato-κ2 O:O)tetraytterbium(III)] hydrate, C36H26N6O16Yb2
  6. Hydrothermal synthesis and crystal structure of catena-poly[(1,10-phenanthroline-κ 2 N,N′)-bis(μ 2-nitroisophthalato-κ 3 O,O′:O″)nickel(II)], C20H13NiN3O7
  7. Crystal structure of 72,73,75,76-tetrafluoro-25,44-dimethyl-31,33,36,38-tetraoxo-31,32,33,36,37,38-hexahydro-3(2,7)-benzo[lmn][3,8]phenanthrolina-1,5(4,1)-dipyridin-1-iuma-2,4(1,2),7(1,4)-tribenzenacyclooctaphane-11,51-diium hexafluoridophosphate, [C46H28F4N4O4][PF6]2, a dicationic cyclophane
  8. Crystal structure of (E)-2-(4-(1H-imidazol-1-yl)benzylidene)-7-fluoro-3,4-dihydronaphthalen-1(2H)-one, C20H15FN2O
  9. The salt crystal structure of etoricoxib hydrochloride, C18H16Cl2N2O2S
  10. The structure of t-butyl 7-[2-(4-fluorophenyl)-3-phenyl-4-(phenylcarbamoyl)-5-(propan-2-yl)-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoate, C37H43FN2O5
  11. The crystal structure of (μ4-oxo)-tri(μ4-2,2′-bipyridine-6,6′-bis(olato)-κ5 O,O′:N:N′:O″)tetrazinc(II) – methylformamide (1/1), C33H25N7O8Zn4
  12. The co-crystal structure of 4-chlorobenzophenone–salicylhydrazide(1/1), C20H17ClN2O3
  13. Crystal structure of 9-fluoro-4-(6-methoxypyridin-2-yl)-5,6-dihydrobenzo[h]quinazolin-2-amine, C18H15FN4O
  14. The crystal structure of the co-crystal composed of benzhydrazide and 5-aminoisophthalic acid, C8H7NO4⋅C7H8N2O
  15. The cocrystal structure of praziquantel-hesperetin (1/1), C35H38N2O8
  16. Crystal structure of new barium manganese fluorides dihydrates, Ba10Mn2F25·2H2O
  17. The crystal structure of bis[μ2-(3-(3-(pyridin-2-yl)-1H-pyrazol-1-yl)propanoate-κ2O:N)-bis(2,2′-bipyridine-κ2 N, N′)dicopper(II)]dinitrate, C42H36Cu2N12O10
  18. Crystal structure of (3,6-di(2-pyridyl)-4-phenylaminopyridazine-κ2N,N′)-bis(2-(p-toluene)pyridinyl-κ2C,N)-iridium(III) hexafluorophosphate –dichloromethane (1/1), C45H37Cl2F6IrN7P
  19. The crystal structure of 2-(2′-carboxybenzyl)benzoic acid, C15H12O5
  20. The crystal structure of dichlorido-[(E)-N′,N″-bis((2E,3E)-3-(hydroxyimino)butan-2-ylidene)-2-((E)-3-(hydroxyimino)butan-2-ylidene)hydrazine-1-carbohydrazonhydrazide-κ 4 N 4]cobalt(II), C13H22N9O3Cl2Co
  21. Crystal structure of (−)-flavesine H, C15H22N2O2
  22. Crystal structure of 3-methoxybenzyl 2-(6-methoxynaphthalen-2-yl)propanoate, C22H22O4
  23. Crystal structure of dicarbonyl(2-oxopyridin-1(2H)-olato-κ 2 O,O)iridium(I), C7H4IrNO4
  24. The crystal structure of 4-(3-(triphenylphosphonio)propyl)piperazin-1-ium dibromide trihydrate, C25H37Br2N2O3P
  25. The crystal structure of ethyl 5,6-dihydroxybenzofuran-3-carboxylate, C11H10O5
  26. Crystal structure of 14-(R)-(2′-cyano-phenoxy)-3,19-diacetyl andrographolide, C31H37NO7
  27. The twinned crystal structure of 10-(4-methyl benzoate)-2,8-diethyl-5,5-difluoro-1,3,7,9-tetramethyl-5H-di-pyrrolo[1,2-c:2′,1′-f] [1,3,2]diazaborinin-4-ium-5-uide, C25H29BF2N2O2
  28. The crystal structure of (9H-thioxanthen-9- ylidene)hydrazine monohydrate, C13H11N2SO0.5
  29. The crystal structure of pyridinium diaqua-{1,2-phenylenebis((carboxylatocarbonyl)amido-κ4 N,N′,O,O′)manganese(III), C15H14MnN3O8
  30. Crystal structure of the hydrogen storage active high entropy phase Tb0.82Sm0.18Ni0.83Co0.17Mg
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  33. Synthesis and crystal structure of methyl 4-(2-ethoxy-2-oxoethoxy)-3,5-dimethoxybenzoate, C14H18O7
  34. Crystal structure of isoxazolo[4,5-b]pyridin-3-amine, C6H5N3O
  35. Crystal structure of 4-chloro-1-isobutyl-1H-imidazo, C14H14ClN3
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  38. Crystal structure of diaqua-tetra((E)-(RS)-1-(2,4-dichlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)pent-1-en-3-ol-κ 1 N)zinc(II) dinitrate dihydrate, C60H76Cl8N14O14Zn
  39. The crystal structure of diphenyl bis(2-((diphenoxyphosphoryl)amino)ethyl)phosphoramidate monohydrate C40H42N3O10P3
  40. Crystal structure of 4,4′-bis(dibromomethyl)-1,1′-biphenyl, C14H10Br4
  41. Crystal structure of CaPtZn
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  43. The crystal structure of (3′-(2-bromophenyl)-2-phenyl-[2,2′-bioxiran]-3-yl)(phenyl)methanone, C92H68O12Br4
  44. Crystal structure of ethyl 4-(4-benzylpiperazin-1-yl)benzoate, C20H24N2O2
  45. The crystal structure of bis(selenocyanato-κ1 N)-bis(methanol)-bis((1E,2E)-1,2-bis (1-(pyridin-4-yl)ethylidene)-hydrazine)iron(II) methanol solvate, C34H44FeN10O4Se2
  46. Crystal structure of (E)-1-(5-bromo-2-hydroxyphenyl)-3-(5-(4-methoxyphenoxy)-3-methyl-1-phenyl-1H-pyrazol-4-yl)prop-2-en-1-one, C26H21BrN2O4
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  48. Crystal structure of 1′,3′-dihydro-2,2′-spirobi[indene]-1,3-dione, C17H12O2
  49. Crystal structure of (E)-2,2′,3,3′-tetrahydro-[1,1′-biindenylidene]-4,4′-diol, C18H16O2
  50. Crystal structure of di-glycylglycinium squarate dihydrate, C12H22N4O12, at 105 K
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https://doi.org/10.1515/ncrs-2024-0416
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Articles in the same Issue

  1. Frontmatter
  2. New Crystal Structures
  3. Crystal structure of the co-crystal 2,4,6-triamino-1,3,5-triazine-1,3-dioxide — acetic acid (1/2) C7H14N6O6
  4. Crystal structure of the dinuclear mercury(II) complex bis(μ2-bromido)-dibromido-bis{1-[(benzotriazol-1-yl)methyl]-1-H-1,3-(2-ethyl-5-methyl-imidazol)-κ1 N} dimercury(II), C26H30N10Hg2Br4
  5. Crystal structure of poly[hexaqua-pentakis(μ4-2,2′-bipyridine-4,4′-dicarboxylato-κ4 O:O′:O″:O‴)-(μ2-2,2′-bipyridine-4,4′-dicarboxylato-κ2 O:O)tetraytterbium(III)] hydrate, C36H26N6O16Yb2
  6. Hydrothermal synthesis and crystal structure of catena-poly[(1,10-phenanthroline-κ 2 N,N′)-bis(μ 2-nitroisophthalato-κ 3 O,O′:O″)nickel(II)], C20H13NiN3O7
  7. Crystal structure of 72,73,75,76-tetrafluoro-25,44-dimethyl-31,33,36,38-tetraoxo-31,32,33,36,37,38-hexahydro-3(2,7)-benzo[lmn][3,8]phenanthrolina-1,5(4,1)-dipyridin-1-iuma-2,4(1,2),7(1,4)-tribenzenacyclooctaphane-11,51-diium hexafluoridophosphate, [C46H28F4N4O4][PF6]2, a dicationic cyclophane
  8. Crystal structure of (E)-2-(4-(1H-imidazol-1-yl)benzylidene)-7-fluoro-3,4-dihydronaphthalen-1(2H)-one, C20H15FN2O
  9. The salt crystal structure of etoricoxib hydrochloride, C18H16Cl2N2O2S
  10. The structure of t-butyl 7-[2-(4-fluorophenyl)-3-phenyl-4-(phenylcarbamoyl)-5-(propan-2-yl)-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoate, C37H43FN2O5
  11. The crystal structure of (μ4-oxo)-tri(μ4-2,2′-bipyridine-6,6′-bis(olato)-κ5 O,O′:N:N′:O″)tetrazinc(II) – methylformamide (1/1), C33H25N7O8Zn4
  12. The co-crystal structure of 4-chlorobenzophenone–salicylhydrazide(1/1), C20H17ClN2O3
  13. Crystal structure of 9-fluoro-4-(6-methoxypyridin-2-yl)-5,6-dihydrobenzo[h]quinazolin-2-amine, C18H15FN4O
  14. The crystal structure of the co-crystal composed of benzhydrazide and 5-aminoisophthalic acid, C8H7NO4⋅C7H8N2O
  15. The cocrystal structure of praziquantel-hesperetin (1/1), C35H38N2O8
  16. Crystal structure of new barium manganese fluorides dihydrates, Ba10Mn2F25·2H2O
  17. The crystal structure of bis[μ2-(3-(3-(pyridin-2-yl)-1H-pyrazol-1-yl)propanoate-κ2O:N)-bis(2,2′-bipyridine-κ2 N, N′)dicopper(II)]dinitrate, C42H36Cu2N12O10
  18. Crystal structure of (3,6-di(2-pyridyl)-4-phenylaminopyridazine-κ2N,N′)-bis(2-(p-toluene)pyridinyl-κ2C,N)-iridium(III) hexafluorophosphate –dichloromethane (1/1), C45H37Cl2F6IrN7P
  19. The crystal structure of 2-(2′-carboxybenzyl)benzoic acid, C15H12O5
  20. The crystal structure of dichlorido-[(E)-N′,N″-bis((2E,3E)-3-(hydroxyimino)butan-2-ylidene)-2-((E)-3-(hydroxyimino)butan-2-ylidene)hydrazine-1-carbohydrazonhydrazide-κ 4 N 4]cobalt(II), C13H22N9O3Cl2Co
  21. Crystal structure of (−)-flavesine H, C15H22N2O2
  22. Crystal structure of 3-methoxybenzyl 2-(6-methoxynaphthalen-2-yl)propanoate, C22H22O4
  23. Crystal structure of dicarbonyl(2-oxopyridin-1(2H)-olato-κ 2 O,O)iridium(I), C7H4IrNO4
  24. The crystal structure of 4-(3-(triphenylphosphonio)propyl)piperazin-1-ium dibromide trihydrate, C25H37Br2N2O3P
  25. The crystal structure of ethyl 5,6-dihydroxybenzofuran-3-carboxylate, C11H10O5
  26. Crystal structure of 14-(R)-(2′-cyano-phenoxy)-3,19-diacetyl andrographolide, C31H37NO7
  27. The twinned crystal structure of 10-(4-methyl benzoate)-2,8-diethyl-5,5-difluoro-1,3,7,9-tetramethyl-5H-di-pyrrolo[1,2-c:2′,1′-f] [1,3,2]diazaborinin-4-ium-5-uide, C25H29BF2N2O2
  28. The crystal structure of (9H-thioxanthen-9- ylidene)hydrazine monohydrate, C13H11N2SO0.5
  29. The crystal structure of pyridinium diaqua-{1,2-phenylenebis((carboxylatocarbonyl)amido-κ4 N,N′,O,O′)manganese(III), C15H14MnN3O8
  30. Crystal structure of the hydrogen storage active high entropy phase Tb0.82Sm0.18Ni0.83Co0.17Mg
  31. Crystal structure of diaqua-bis[5-methyl-1-(1H-pyrazol-3-yl)-1H-1,2,3-triazole-4-carboxylato-κ 2 N,O)]manganese(II), C14H16MnN10O6
  32. Crystal structures of diiodido-3-((pyridin-2-ylmethylene)amino)-2-(pyridin-3-yl)-2,3-dihydroquinazolin-4(1H)-one-cadmium(II)
  33. Synthesis and crystal structure of methyl 4-(2-ethoxy-2-oxoethoxy)-3,5-dimethoxybenzoate, C14H18O7
  34. Crystal structure of isoxazolo[4,5-b]pyridin-3-amine, C6H5N3O
  35. Crystal structure of 4-chloro-1-isobutyl-1H-imidazo, C14H14ClN3
  36. The crystal structure of 1,1,1,2,2,2-hexakis(2-methyl-2-phenylpropyl)distannane,C60H78Sn2
  37. The crystal structure of (2,7-dimethoxynaphthalene-1,8-diyl)bis((3-nitrophenyl)methanone), C26H18N2O8
  38. Crystal structure of diaqua-tetra((E)-(RS)-1-(2,4-dichlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)pent-1-en-3-ol-κ 1 N)zinc(II) dinitrate dihydrate, C60H76Cl8N14O14Zn
  39. The crystal structure of diphenyl bis(2-((diphenoxyphosphoryl)amino)ethyl)phosphoramidate monohydrate C40H42N3O10P3
  40. Crystal structure of 4,4′-bis(dibromomethyl)-1,1′-biphenyl, C14H10Br4
  41. Crystal structure of CaPtZn
  42. Crystal structure of 3-chloro-5-(trifluoromethyl)pyridine-2-carboxylic acid, C7H3ClF3NO2
  43. The crystal structure of (3′-(2-bromophenyl)-2-phenyl-[2,2′-bioxiran]-3-yl)(phenyl)methanone, C92H68O12Br4
  44. Crystal structure of ethyl 4-(4-benzylpiperazin-1-yl)benzoate, C20H24N2O2
  45. The crystal structure of bis(selenocyanato-κ1 N)-bis(methanol)-bis((1E,2E)-1,2-bis (1-(pyridin-4-yl)ethylidene)-hydrazine)iron(II) methanol solvate, C34H44FeN10O4Se2
  46. Crystal structure of (E)-1-(5-bromo-2-hydroxyphenyl)-3-(5-(4-methoxyphenoxy)-3-methyl-1-phenyl-1H-pyrazol-4-yl)prop-2-en-1-one, C26H21BrN2O4
  47. The crystal structure of methyl 4-(4-(methylsulfonyl)phenyl)-2-methyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate, C19H21NO5S
  48. Crystal structure of 1′,3′-dihydro-2,2′-spirobi[indene]-1,3-dione, C17H12O2
  49. Crystal structure of (E)-2,2′,3,3′-tetrahydro-[1,1′-biindenylidene]-4,4′-diol, C18H16O2
  50. Crystal structure of di-glycylglycinium squarate dihydrate, C12H22N4O12, at 105 K
  51. Crystal structure of {[(4-fluorophenyl)methyl]triphenylphosphonium}dibromocopper(I), [C25H21FP]+[CuBr2]−
  52. Crystal structure of poly[diaqua-bis(μ2-5-((pyridin-4-yl-methyl)amino)benzene-1,3-dicarboxylato-κ 2 N:O)cadmium(II)], C28H26CdN4O10
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