Abstract
C19H17N9O2, monoclinic, C2/c (no. 15), a = 20.297(7) Å, b = 10.122(3) Å, c = 9.078(3) Å, β = 95.675(4)°, V = 1856.0(10) Å3, Z = 4, Rgt(F) = 0.0467, wRref(F2) = 0.1205, T = 296(2) K [1–3].

The crystal 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.
Data collection and handling.
| Crystal: | White block |
| Size: | 0.08 × 0.06 × 0.04 mm |
| Wavelength: | Mo Kα radiation (0.71073 Å) |
| μ: | 0.10 mm−1 |
| Diffractometer, scan mode: | Bruker APEX-II, φ and ω-scans |
| θmax, completeness: | 27.7°, >99% |
| N(hkl)measured, N(hkl)unique, Rint: | 16459, 2160, 0.045 |
| Criterion for Iobs, N(hkl)gt: | Iobs > 2 σ(Iobs), 1544 |
| N(param)refined: | 137 |
| Programs: | Bruker programs [1], SHELX [2], [3] |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).
| Atom | x | y | z | Uiso*/Ueq |
|---|---|---|---|---|
| O1 | 0.39649(7) | 0.77301(12) | 0.53863(13) | 0.0503(4) |
| N1 | 0.35830(7) | 0.16154(13) | 0.50580(16) | 0.0437(4) |
| N2 | 0.39799(7) | 0.50154(13) | 0.51742(15) | 0.0386(4) |
| N3 | 0.43094(7) | 0.58705(13) | 0.42960(15) | 0.0397(4) |
| H3 | 0.4533 | 0.5552 | 0.3622 | 0.048* |
| N4 | 0.5000 | 0.72678(17) | 0.2500 | 0.0327(4) |
| N5 | 0.40495(9) | 0.34440(15) | 0.32842(16) | 0.0548(5) |
| H5A | 0.4254 | 0.3970 | 0.2741 | 0.066* |
| H5B | 0.3958 | 0.2652 | 0.2987 | 0.066* |
| C1 | 0.5000 | 1.0012(2) | 0.2500 | 0.0397(5) |
| H1 | 0.5000 | 1.0931 | 0.2500 | 0.048* |
| C2 | 0.46444(8) | 0.93226(16) | 0.34627(17) | 0.0366(4) |
| H2 | 0.4396 | 0.9766 | 0.4116 | 0.044* |
| C3 | 0.46643(8) | 0.79537(15) | 0.34374(16) | 0.0328(4) |
| C4 | 0.42836(8) | 0.71826(15) | 0.44852(16) | 0.0353(4) |
| C5 | 0.38730(8) | 0.38596(16) | 0.46000(17) | 0.0348(4) |
| C6 | 0.35362(8) | 0.28738(15) | 0.54807(17) | 0.0345(4) |
| C7 | 0.31835(8) | 0.32597(18) | 0.66369(19) | 0.0420(4) |
| H7 | 0.3158 | 0.4146 | 0.6896 | 0.050* |
| C10 | 0.32888(10) | 0.07085(18) | 0.5834(2) | 0.0524(5) |
| H10 | 0.3327 | −0.0175 | 0.5573 | 0.063* |
| C9 | 0.29333(10) | 0.1010(2) | 0.6996(2) | 0.0570(5) |
| H9 | 0.2737 | 0.0344 | 0.7508 | 0.068* |
| C8 | 0.28721(9) | 0.2308(2) | 0.7394(2) | 0.0539(5) |
| H8 | 0.2624 | 0.2539 | 0.8163 | 0.065* |
Source of material
2,6-Pyridinedicarboxylic acid dihydrazide (0.010 mol) was added to a methanolic solution (30 mL) of the methyl ester of iminopyrazine-2-carboxylic acid (2.6 g, 0.025 mol), prepared in situ from 2-cyanopyrazine and sodium metal (stirred at room temperature for 12 h). The mixture was refluxed for 24 h with the formation of a yellow powder. The solid was filtered off, washed with water, methanol and ether and dried under vacuum. Yield (6.5 g, 80%) m.p. 253–259 K. FTIR (KBr) ν (cm−1): 3200, 1693, 1564, 1466, 1257, 1041. Anal Calc. for C19H17N9O2(%): C, 56.58; H, 4.22; N, 31.27. Found (%): C, 56.61; H, 4.25; N, 31.30.
Experimental details
The C-bound H atoms were geometrically placed (C—H = 0.95–0.98 Å) and refined as riding with Uiso(H) = 1.2–1.5 Ueq(C). The N-bound H atoms were located in a difference Fourier map but were refined riding on the parent atom with Uiso(H) set to 1.2 Uequiv(N) [1], [2], [3].
Discussion
Tritopic ligands with a 2,6-pyridine dihydrazone are interesting ligands as there are seven potentially coordinated atoms. So polynuclear metal complexes can be synthysized with 2,6-pyridine dihydrazone. Lots of complexes containing tritopic ligands have been reported which have been identified by X-ray crystallography, and include mononuclear, dinuclear, hexanuclear, heptanuclear, and mononuclear examples. Some of these could be components in grid assembly or further examples in a potentially vast library of different complexes which could form as a result of the dynamic nature of the metal-ligand interaction, the flexibility of the ligands, and their different possible bonding conformations. The complex containing the ligands 2noap have been reported, but the structure of the ligand 2noap has not been reported [4], [5], [6], [7].
As shown in the figure, the title compound crystallizes in the monoclinic space group C2/c with four formula units in the unit cell. Thus, the title molecule is located on a twofold axis. The bond lengths of N2 = C5, N2—C3 and C3—N4 are 1.290, 1.396 and 1.337 Å, respectively, which are similar to a literature known structure The atoms N1, N2, O1, N4, are the coordinating atoms of the ligand, one ligand will coordinate with three metal atoms. The transition metal compelxes have been reported, but the rare earth metal complexes have not been reported, our group will do this job in the future. This sentence was added after [8], [9], [10], [11], [12], [13], [14], [15], [16].
Acknowledgements
The authors gratefully acknowledge scientific and technological project of Henan province (192102310232, 172102210161), the Anyang Key Laboratory for Chemical Biosensing (21302003), Key discipline of environmental engineer of Anyang Institute of Technology, the Natural Science Foundation of China (21471015, 21631003, 21561007, and 21701046), the Innovation Program for High-level Talents of Guizhou Province (No. 2016-5657), the Science and Technology Fund of Guizhou Province (No. 2016-1030), the Major Program for Creative Research Groups of Guizhou Provincial Education Department (2017-028), and the Fundamental Research Funds for the Central Universities (FRF-BD-17-016A).
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©2020 Yang Liguo et al., published by De Gruyter, Berlin/Boston
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- Crystal structure of bis[2-(1-(3-ethylpyrazin-2-yl)ethylidene)-1-tosylhydrazin-1-ido-κ3-N,N′,O]copper(II), C30H34N8O4S2Cu
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- The crystal structure of 4-(trifluoromethyl)nicotinic acid, C7H4F3NO2
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- The crystal structure of 2,2,2-trifluoro-1-(isoquinolin-1-yl)ethane-1,1-diol, C11H8F3NO2
- The crystal structure of 3-bromoisonicotinic acid, C6H4BrNO2
- The crystal structure of 5-nitropicolinic acid monohydrate, C6H6N2O5
- The crystal structure of 3-(4-hydroxybenzyl)-1,5-dioxaspiro[5.5]undecane-2,4-dione, C16H18O5
- Crystal structure of [[Mo3Se7(S2CNEt2)3]2(μ-Se)] ⋅ 2(C6H4Cl2), C42H68Cl4Mo6N6S12Se15
- Crystal structure of (E)-4-hydroxy-3-((5-phenyl-1,3,4-oxadiazol-2-yl)thio)pent-3-en-2-one, C13H12N2O3S
- The crystal structure of (2,3-dioxo-5,6:13,14-dibenzo-9,10-benzo-1,4,8,11-7, 11-diene-κ4N,N′,N′′,N′′′)-nickel(II), Ni(C22H14N4O2)
- Crystal structure of 3-(1-benzyl-2-ethyl-4-nitro-1H-imidazol-5-ylthio)-propanoic acid, C15H17N3O4S
- The crystal structure of dichlorobis(2-(dicyclohexylphosphino)-2′,4′,6′-tri-i-propyl-1,1′-biphenyl) palladium(II)-dichloroform, C68H100Cl8P2Pd
- Crystal structure and antimicrobial properties of (1,4,7,10-tetraoxacyclododecane-κ4O,O′,O′′,O′′′)cesium(I) pentaiodide, C16H32CsI5O8
Articles in the same Issue
- Frontmatter
- Crystal structure of catena-poly[(μ2-3-(benzo[d]thiazol-2-yl)-5-carboxybenzoato-κ2N:O)silver(I)], C15H8AgNO4S
- Crystal structure of bis(4-phenylpiperazin-1-ium) bis(2-(4-phenylpiperazin-1-yl)succinato-κ2O,O′)copper(II) tetrahydrate, C48H70CuN8O12, [C10H14N2]2[Cu(C14H17N2O4)2] ⋅ 4 H2O
- Crystal structure of triaqua-bis(2-(6-hydroxy-5-(hydroxymethyl)-5,8a-dimethyl-2-methylenedecahydronaphthalen-1-yl)-1-(2-oxo-2,5-dihydrofuran-3-yl)ethane-1-sulfonato-κ2O,O′)calcium(II) – ethanol (1/2), C44H76CaO19S2
- The crystal structure of ethyl 5-(4-(diphenylamino)phenyl)thiophene-2-carboxylate, C25H21NO2S
- The crystal structure of 5-bromo-2-(2-methyl-2H-tetrazol-5-yl)pyridine, C7H6BrN5
- The crystal structure of (E)-5-chloro-2-hydroxy-N′-(2-hydroxy-4-methoxybenzylidene)benzohydrazide, C15H13ClN2O4
- The crystal structure of (2Z,2′Z)-N′,N′′′′-(pyridine-2,6-dicarbonyl)dipicolinohydrazonamide, C19H17N9O2
- Photochromic properties and crystal structure of 3,3′-(perfluorocyclopent-1-ene-1,2-diyl)bis(5-(4-(azidomethyl)phenyl)-2-methylthiophene), C29H20F6N6S2
- Crystal structure of aqua-dichlorido-(4-(((3-ethoxy-2-oxidobenzylidene)hydrazono)(oxido)methyl)pyridin-1-ium-κ3N,O,O′)iron(III), C15H16Cl2N3O4Fe
- Crystal structure of catena-poly[diaqua-(μ2-4,4′-bipyridine-κ2N:N′)-bis(2,3,4,5-tetrabromo-6-carboxybenzoato-κ1O)-nickel(II)], C26H14Br8NiN2O10
- Crystal structure of diethanol-κ1O-bis(μ2-N-((2-oxidonaphthalen-1-yl)methylene)pyrazine-2-carbohydrazonato-κ5N,O,O′:O′:N′)-bis(nitrato-κ2O,O′)dieuropium(III), C36H32N10O12Eu2
- The crystal structure of 2-aminoisophthalic acid, C8H7NO4
- Crystal structure of (E)-2-(4-((3,4-difluorobenzyl)oxy)styryl)-4,6-dimethoxybenzaldehyde, C24H20F2O4
- Crystal structure of 2-benzoylpyrene, C23H14O
- Crystal structure of chlorido-(η6-p-cymene)-(N-(2-fluorophenyl)-1-(pyridin-2-yl)methanimine-κ2N,N′)ruthenium(II) – acetone (1/1), C22H23ClN2F7OPRu
- The crystal structure of 2-bromoisonicotinic acid, C6H4BrNO2
- Crystal structure of 1,3,5,7-tetraphenyl-8-(N-phenylformamido)-2-oxa-5-azabicyclo[4.2.0]oct -3-en-7-yl benzoate, C44H34N2O4
- Synthesis and crystal structure of 4-(3-acetyl-5-(thiophen-2-yl)-2,3-dihydro-1,3,4-oxadiazol-2-yl)-7-(diethylamino)-2H-chromen-2-one, C21H21N3O4S
- Crystal structure of poly[diaqua-(μ2-4,4′-bipyridine-κ2N:N′)-(μ2-3,4,5,6-tetrafluorophthalato-κ2O:O′)nickel(II)], C18H12F4NiN2O6
- Crystal structure of 4-hydroxynaphtho[2,3-b]benzofuran-6,11-dione, C16H8O4
- The crystal structure of 3,10-bis(4-methoxyphenyl)-6,12-dibenzyl-2,9-acetyl-6,12-diazapentacyclo[6.3.1.02,7.04,11.05,9]dodecane – acetone (1/1), C45H48N2O5
- The crystal structure of (E)-2-(((2-(1H-indol-3-yl)ethyl)iminio)methyl)-6-bromophenolate, C17H15N2BrO
- Crystal structure of catena-poly[diaqua-(μ2-oxalyl dihydrazide-κ4N,O:N′,O′)-bis(μ2-pyridine-2,3-dicarboxylato-κ3N,O,O′)dicadmium(II)] hexahydrate, C16H28O18N6Cd2
- Crystal structure of poly[tetra-(μ4-naphthalene-1,8-dicarboxylato-κ4O:O,O′: O′′:O′′,O′′′)-(μ4-oxo-κ4O:O:O:O) penta-lead(II)], C48H24O17Pb5
- Crystal structure of 5H-dibenzo[c,f][1,5]oxabismocin-12 (7H)-yl acetate, C16H15O3Bi
- The crystal structure of 2-(4-chloro-6-nitrophenyl)-1-(4-chloro-3-nitrophenyl)diazene 1-oxide, C12H6Cl2N4O5
- Crystal structure of bis(3-methyl-N-(1-(pyrazin-2-yl)ethylidene)benzohydrazonato-κ3O,N,N′)nickel(II), C28H26N8O2Ni
- Crystal structure of 3,10-bis(4-chlorophenyl)-6,12-dibenzyl-2,9-acetyl-6,12-diazapentacyclo[6.3.1.02,7.04,11.05,9]-dodecane, C40H36Cl2N2O2
- Crystal structure of bis[(μ2-4⋯O,O′:O′)-(4-hydroxybenzoato-κ2O,O′)-(1,10-phenanthroline-κ2N,N′)]-di-lead(II)μ-4-hydroxybenzoato-κ3O,O′:O′;κ3O,O′:O′-bis-[(4-hydroxybenzoato-κ2O,O′)bis(1,10-phenanthroline-κ2N,N′)di-lead(II)] monohydrate, C52H36N4O12Pb2 ⋅ H2O
- Crystal structure of poly[diaqua-(μ3-3,4,5,6-tetrafluoro-phthalato-κ3O:O′:O′′)-(μ2-1,2-bis(4-pyridyl)ethene-κ2N:N′)cobalt(II)], C14H9CoF4NO6
- Crystal structure of 7-hydroxy-4-phenyl-2H-chromen-2-one, C15H10O3
- Crystal structure of 3,7-dimethyl-1-(5-oxohexyl)-3,7-dihydro-1H-purine-2,6-dione 4-hydroxybenzoic acid, C20H24N4O6
- Crystal structure of catena-poly[(μ2-1,5-dimethyl-2-phenyl-4-((pyridin-4-ylmethylene)amino)-1,2-dihydro-3H-pyrazol-3-one-κ2N:O)-bis(nitrato-κ1O)zinc(II)], C17H16N6O7Zn
- The crystal structure of diaqua-bis(6-aminopicolinato-κ2N,O)magnesium(II), C12H14O6N4Mg
- Crystal structure of (pyridine-2-carboxamide-κ2N,O)-[tris((1H-benzo[d]imidazol-2-yl)methyl)amine-κ4N,N′,N′′,N′′′]nickel(II) diperchlorate — methanol (1/3), C33H39Cl2N9NiO12
- Crystal structure of catena-poly[diaqua-bis(3-(4-trifluoromethyl-phenyl)-acrylato-κO1)-(μ2-1,4-bis(1-imidazolyl)benzene-κ2N3:N3′)cobalt(II)], C32H26CoF6N4O6
- Crystal structure of (E)-3-(2-(2-hydroxy-4-methoxystyryl)-3,3-dimethyl-3H-indol-1-ium-1-yl)propane-1-sulfonate monohydrate, C22H25NO5S⋅H2O
- The crystal structure of bis(N-oxy-2-(1H-tetrazol-1-yl) acetamide κ2O,O′)-diaqua-zinc(II), C6H12ZnN10O6
- Crystal structure of (E)-4-((4-chlorophenylimino)methyl)pyridinium 3,5-dinitrobenzoate, C19H13ClN4O6
- Crystal structure of dichlorido-bis((E)-2-((pyridin-4-ylmethylene)amino)phenol)zinc(II), C24H20Cl2N4O2Zn
- Crystal structure of cyclo-[tetrachlorido-bis(μ2-p-xylylenediamine-κ2N:N′)dipalladium(II)] dimethyl sulfoxide solvate, C20H36Cl4N4O2Pd2S2
- Crystal structure of 4-(3-fluorophenyl)-7-hydroxy-2H-chromen-2-one, C15H9FO3
- Crystal structure of (E)-2-((2-(pyrimidin-2-yl)hydrazono)methyl)quinolin-1-ium perchlorate – methanol (1/1), C15H16N5O5Cl
- The crystal structure of bis(N-(amino(pyridin-2-yl)methylene)-5-chloro-2-hydroxybenzohydrazonato-κ3N,N′,O)zinc(II) – methanol (2/5), C57H60Cl2N16O13Zn2
- Synthesis and crystal structure of 4,4′-di(4-pyridyl)-6,6′-di(tert-butyl)-2,2′-[propylenedioxybis(nitrilomethylidyne)]diphenol, C35H40N4O4
- Crystal structure of (3E,3′E)-3,3′-((1,3,4-thiadiazole-2,5-diyl)bis(sulfanediyl))bis(4-hydroxy-4-phenylbut-3-en-2-one), C22H18N2O4S3
- Crystal structure of (N-benzyl-N-methyl-dithiocarbamato-κ2S,S′)di(4-chlorobenzyl)chloridotin(IV), C23H22Cl3NS2Sn
- Crystal structure of (1,4,7,10,13,16-hexaoxacyclooctadecane-κ6O6) sodium bromide hydrate, [Na(18-crown-6)]Br ⋅ H2O, C12H26BrNaO7
- Crystal structure of 7-ethoxyl-6,8-difluoro-4-oxo-1-phenyl-1,4-dihydro-quinoline-3-carboxylic acid, C18H13F2N1O4
- Crystal structure of chlorido (2-(4-ethylphenyl)pyrimidine-k2C,N)(triphenylphosphane-kP) palladium(II), C30H26ClN2PPd
- Crystal structure of 18-crown-6 – 1,4-diiodotetrafluorobenzene – acetonitrile (1/1/2), C22H30F4I2N2O6
- Crystal structure of diisobutyl 2,5-dihydroxycyclohexa-1,4-diene-1,4-dicarboxylate, C16H24O6
- Crystal structure of poly[[tris(μ2-cis-1,2-cyclohexanedicarboxylato)-κ2O, O′]-bis[μ3-1,3,5-tris[(1H-imidazol-1-yl)methyl]benzene-κ3N, N′,N′′]-trizinc(II)] – water (1/20), C60H106N12O32Zn3
- The synthesis and crystal structure of 5-amino-1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-4-((trifluoromethyl)sulfinyl)-1H-pyrazole-3-carboxamide–tetrahydrofuran (1/1), C16H14N4Cl2F6O3S
- Crystal structure of dimethylbis(diisopropyldithiocarbamato-κ2S,S′)tin(IV), C16H34N2S4Sn
- Crystal structure of diisopropyl 2,5-dihydroxycyclohexa-1,4-diene-1,4-dicarboxylate, C14H20O6
- The synthesis and crystal structure of ethyl (E)-1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-5-((2-methoxybenzylidene)amino)-4-((trifluoromethyl)sulfinyl)-1H-pyrazole-3-carboxylate, C22H15N3Cl2F6O4S
- The crystal structure of a matrine derivative, 13-(methylamine-1-yl) carbodithioate matrine, C17H27N3OS2
- Crystal structure of bis(2-hydroxy-6-((phenylimino)methyl)phenolato-κ2N,O)copper(II), C26H20CuN2O4
- The crystal structure of 2-p-fluorophenyl-5-dihydroxymethyl-1,3,4-oxadiazole, C9H7FN2O3
- Crystal structure of dichloridobis(4-chlorophenyl-κC1)(1,10-phenanthroline-κ2N,N′)tin(IV), C24H16Cl4N2Sn
- Crystal structure of bis{bromido-triphenyltin(IV)}(μ2-[4,4′-bipyridine]1,1′-dioxide-κ2O:O′), C46H38Br2N2O2Sn2
- Crystal structure of 2-(5-chloro-quinolin-8-yloxy)-N-quinolin-8-yl-acetamide, C20H14N3O2Cl
- Crystal structure of bis(N-(1-(3-ethylpyrazin-2-yl)ethylidene)-3-hydroxy-2-naphthohydrazonato-κ3N,N′,O)cobalt(II) — dimethylformamide (1/1), C41H41N9O5Co
- Crystal structure of bis[2-(1-(3-ethylpyrazin-2-yl)ethylidene)-1-tosylhydrazin-1-ido-κ3-N,N′,O]copper(II), C30H34N8O4S2Cu
- Crystal structure of (2-p-tolylpyrimidine-κ2C,N)(triphenylphosphane-κP) palladium(II), C29H24ClN2PPd
- Halogen bonding in crystal structure of bis(1,4,7,10-tetraoxacyclododecane-κ4O,O′,O′′,O′′′)cesium triiodide, C16H32CsI3O8
- The synthesis and crystal structure of N-(3-cyano-1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-4-(trifluoromethylsulfinyl)-1H-pyrazol-5-yl)-2-phenylacetamide, C20H10N4Cl2F6O2S
- The crystal structure of 4-(trifluoromethyl)nicotinic acid, C7H4F3NO2
- Crystal structure of 3-(2-methylbenzyl)thiazolidin-2-one, C11H13ONS
- The crystal structure of 2,2,2-trifluoro-1-(isoquinolin-1-yl)ethane-1,1-diol, C11H8F3NO2
- The crystal structure of 3-bromoisonicotinic acid, C6H4BrNO2
- The crystal structure of 5-nitropicolinic acid monohydrate, C6H6N2O5
- The crystal structure of 3-(4-hydroxybenzyl)-1,5-dioxaspiro[5.5]undecane-2,4-dione, C16H18O5
- Crystal structure of [[Mo3Se7(S2CNEt2)3]2(μ-Se)] ⋅ 2(C6H4Cl2), C42H68Cl4Mo6N6S12Se15
- Crystal structure of (E)-4-hydroxy-3-((5-phenyl-1,3,4-oxadiazol-2-yl)thio)pent-3-en-2-one, C13H12N2O3S
- The crystal structure of (2,3-dioxo-5,6:13,14-dibenzo-9,10-benzo-1,4,8,11-7, 11-diene-κ4N,N′,N′′,N′′′)-nickel(II), Ni(C22H14N4O2)
- Crystal structure of 3-(1-benzyl-2-ethyl-4-nitro-1H-imidazol-5-ylthio)-propanoic acid, C15H17N3O4S
- The crystal structure of dichlorobis(2-(dicyclohexylphosphino)-2′,4′,6′-tri-i-propyl-1,1′-biphenyl) palladium(II)-dichloroform, C68H100Cl8P2Pd
- Crystal structure and antimicrobial properties of (1,4,7,10-tetraoxacyclododecane-κ4O,O′,O′′,O′′′)cesium(I) pentaiodide, C16H32CsI5O8