Abstract
C16H18N4O8, monoclinic, C2/m (no. 12), a = 14.517(4) Å, b = 18.006(7) Å, c = 6.916(3) Å, β = 116.97(3)°, V = 1611.2(11) Å3, Z = 4, Rgt(F) = 0.0497, wRref(F2) = 0.1387, T = 296(2) K.

The salt-type title crystal structure is shown in the figure. Tables 1 and 2 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters.
Data collection and handling.
| Crystal: | Colourless block | 
| Size: | 0.15 × 0.15 × 0.10 mm | 
| Wavelength: | Mo Kα radiation (0.71073 Å) | 
| μ: | 0.13 mm−1 | 
| Diffractometer, scan mode: | APEX CCD, f and w scans | 
| 2θmax, completeness: | 28.4°, >99% | 
| N(hkl)measured, N(hkl)unique, Rint: | 7546, 2068, 0.041 | 
| Criterion for Iobs, N(hkl)gt: | Iobs > 2 σ(Iobs), 1326 | 
| N(param)refined: | 144 | 
| Programs: | Bruker [7], SHELX [8], [9] | 
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).
| Atom | x | y | z | Uiso*/Ueq | 
|---|---|---|---|---|
| H2Oa | 0.874(3) | 0.0239(9) | 0.976(9) | 0.10(3)* | 
| O1Aa | 0.8488(6) | 0.0628(4) | 1.0003(8) | 0.083(3) | 
| O1Ba | 0.8873(6) | 0.0694(3) | 0.9735(9) | 0.077(3) | 
| C1 | 0.80234(18) | 0.09111(12) | 0.8080(3) | 0.0412(6) | 
| C2 | 0.75693(14) | 0.03864(10) | 0.6152(3) | 0.0277(4) | 
| C3 | 0.71038(14) | 0.07486(10) | 0.4163(3) | 0.0252(4) | 
| H1 | 0.7098 | 0.1265 | 0.4167 | 0.030* | 
| C4 | 0.66478(13) | 0.03908(10) | 0.2172(3) | 0.0238(4) | 
| C5 | 0.62023(15) | 0.09157(11) | 0.0252(3) | 0.0286(4) | 
| C6 | 0.5000 | 0.38010(16) | 0.5000 | 0.0365(7) | 
| H6 | 0.4656 | 0.4122 | 0.3765 | 0.044* | 
| C7 | 0.36991(16) | 0.28844(13) | 0.3321(3) | 0.0398(5) | 
| H7A | 0.3436 | 0.3207 | 0.2061 | 0.048* | 
| H7B | 0.3162 | 0.2572 | 0.3561 | 0.048* | 
| C8 | 0.47141(18) | 0.28868(13) | 0.7120(3) | 0.0389(5) | 
| H8A | 0.5069 | 0.3216 | 0.8423 | 0.047* | 
| H8B | 0.4214 | 0.2583 | 0.7378 | 0.047* | 
| C9 | 0.5000 | 0.19030(15) | 0.5000 | 0.0332(7) | 
| H9 | 0.4499 | 0.1606 | 0.5217 | 0.040* | 
| N1 | 0.42276(13) | 0.33437(10) | 0.5225(3) | 0.0357(4) | 
| N2 | 0.55084(13) | 0.23931(9) | 0.6922(2) | 0.0327(4) | 
| H2 | 0.5821 | 0.2104 | 0.8100 | 0.039* | 
| O2 | 0.77891(14) | 0.15570(9) | 0.7872(2) | 0.0505(5) | 
| O3 | 0.62778(12) | 0.15884(8) | 0.0596(2) | 0.0398(4) | 
| O4 | 0.57607(12) | 0.06621(9) | −0.1684(2) | 0.0440(4) | 
| H1Oa | 0.579(3) | 0.014(3) | −0.176(6) | 0.053* | 
aOccupancy: 0.5.
Source of material
All reagents and solvents were purchased from commercial sources and used as received. An aqueous solution (5 mL) of hexamethylenetetramine (70 mg, 0.5 mmol) and an ethanolic solution (5 mL) of 1,2,4,5-benzene tetracarboxylic acid (130 mg, 0.5 mmol) were mixed, and the solution was allowed to stand at room temperature. Colorless plate crystals were obtained after three days (yield 40 mg, 20%).
Experimental details
H atoms bound to C atoms were placed in calculated positions and refined as riding on their parent atoms, with C—H = 0.93 Å (aromatic), C—H = 0.96 Å (methylene), and with Uiso(H) = 1.5 Ueq(C) for methyl H atoms and 1.2 Ueq(C) for all other H atoms. The H atoms bound to N and O atoms were found from the Fourier difference map.
Comment
Multicarboxylates are widely used as building blocks for the construction of supramolecular structures, not only because they have versatile coordination modes to metal ions, but also because they are hydrogen bonding acceptors and donors [1], [2], [3]. Meanwhile, hexamethylenetetramine (hmt), having four N atoms, also can be involved in hydrogen bonding to generate diamond-type supramolecular networks [4], [5]. With this in mind, we have become interested in the preparation of supramolecular structures based on the multicarboxylates and hexamethylenetetramine. Herein, we report the salt-type crystal structure [6] based on 1,2,4,5-benzene tetracarboxylic acid (H4btc) and hexamethylenetetramine, [H2hmt][H2btc].
The asymmetric unit of the title compound consists of one half of a [H2hmt]2+ cation and one half of a [H2btc]2− anion, resulting in a 1:1 salt. In the structure, the two protons of the former 1,2,4,5-benzene tetracarboxylic acid were transferred to two N atoms of hexamethylenetetramine. Each [H2hmt]2+ cation is hydrogen-bonded with two adjacent [H2btc]2− anions, and each [H2btc]2− anion is also hydrogen-bonded with two adjacent [H2hmt]2+ cations to form [2 + 2] dimers through four medium strong N2-H2⋅⋅⋅O3 hydrogen bonds (N2-H2⋅⋅⋅O3 = 2.689(2) Å).
Acknowledgements
This work was supported by the National Key Research and Development Program of China (No. 2017YFD0501406), the National Nature Foundation of China [No. 21461011 and 31560712], the Natural Science Foundation of Jiangxi Province [No. 20112BBF60024], and the Foundation of Jiangxi Educational Committee (GJJ170245, GJJ170257£©).
References
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©2018 Xiao Wei et al., published by De Gruyter, Berlin/Boston
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Articles in the same Issue
- Cover and Frontmatter
 - Crystal structure of (E)-1-(4-(((E)-2-hydroxy-5-methylbenzylidene)amino)phenyl)ethan-1-one O-methyl oxime, C17H18N2O2
 - Crystal structure of 1,3,5,7-tetraazaadamantane-1,3-diium 2,5-dicarboxyterephthalate, C16H18N4O8
 - Crystal structure of guanidinium tetrabutyl-ammonium 5-hydroxyisophthalate dihydrate, C25H50N4O7
 - Crystal structure of poly[aqua-(μ2-5-methoxyisophthalate-κ3O,O′:O′′)-(μ2-1,4-bis((1H-1,2,4-triazol-1-yl)methyl)benzene-κ2N:N′)nickel(II), NiC21H20N6O6
 - Crystal structure of aqua-bis(3,4-dimethoxybenzoato-κ1O)-(2,2′-bipyridine-κ2N,N′)copper(II), C28H26CuN2O9
 - Crystal structure of catena-poly[aqua-(μ2-(3,5-di(1H-imidazol-1-yl)-pyridine-κ2N:N′)-(μ2-2-(carboxylatomethyl)benzoato-κ2O:O′)] cadmium(II), C20H17CdN5O5
 - The crystal structure of catena-poly[chlorido-(μ2-5-methyl-1,3,4-thiadiazole-2-thiolato-κ2S:N)mercury(II)], C3H3ClHgN2S2
 - Crystal structure of (E)-2,4-dichloro-6-(((4-methyl-2-nitrophenyl)imino)methyl)phenol, C14H10Cl2N2O3
 - Crystal structure of a new polymorph of bis[μ-1,3-bis(diphenylphosphino)propane-κ2P:P′-disilver(I)] bis(tetrafluoroborate), [Ag(dppp)]2(BF4)2, C54H52Ag2B2F8P4
 - The crystal structure of 2-phenyl-4,6-bis(R-tert-butylsulfonamido)-1,3,5-triazine – ethyl acetate (2/1), C38H58N10O6S4
 - Crystal structure of 6-amino-8-(2-methoxy-phenyl)-2-methyl-2,3,8,8a-tetrahydro-1H-iso-quinoline-5,7,7-tricarbonitrile monohydrate, C20H21N5O2
 - Crystal structure of methyl (1-phenylethyl)carbamate, C10H13NO2
 - Crystal structure of dimethanol-(μ2-squarato-κ2O:O′)-tetrakis(tri-p-tolylphosphane-κP)disilver(I) – methanol (1/2), C92H98Ag2O8P4
 - Crystal structure of catena-poly[bis(μ2-1,4-bis(triazol-1-ylmethyl)benzene-κ2N:N′)-bis(5-tert-butyl-isophthalate-κO)copper(II)]tetrahydrate, C36H46CuN6O12
 - Crystal structure of 4-aminopyridinium 4-acetyl-(pyridin-4-yl)-1H-1,2,3-triazol-5-olate monohydrate, C14H16N6O3
 - Crystal structure of 2-(8-bromo-2-phenylimidazo[1,2-α]pyridin-3-yl)-6,7-dimethyl-3-phenylquinoxaline, C29H21BrN4
 - Crystal structure of aqua(1-(2-pyridyl)ethanone oxime-κ2N,N′)(1-(2-pyridyl)ethanone oximato-κ2N,N′) nitrate monohydrate, C14H19N5O7Cu
 - Crystal structure of poly[tetraaqua-(μ4-oxalato-κ4O,O′:O′′,O′′′)-(μ8-benzene-1,2,4,5-tetracarboxylato-κ8O1:O2:O3:O4:O5:O6:O7:O8)yttrium(III)], C6H5O8Y
 - Crystal structure of bis{catena-poly[(μ2-1,2-bis(4-pyridyl)ethane-κ2N:N′)silver(I)]} diaqua-bis(5-(4-carboxyphenyl)pyridine-2-carboxylato-κ2N,O)-(μ2-1,2-bis(4-pyridyl)ethane-κ2N:N′)disilver(I) octahydrate, C31H35Ag2N4O9
 - Crystal structure of (E)-N-(2-(benzylamino)-2-oxo-1-(4-oxo-4H-chromen-3-yl)ethyl)-N-(4-bromophenyl)-3-chloroacrylamide hydrate, C27H22BrClN2O5
 - Crystal structure of catena-poly[octaaqua-bis(μ2-4,6-dicarboxyisophthalate-κ2O:O′)cadmium(II)disodium(I)] dihydrate, C20H28CdNa2O26
 - Crystal structure of acetonitrile{bis(2-benzimidazolylmethyl)amine-κ3N,N′,N′′}-{maleato-κO}zinc(II) perchlorate - acetonitrile (1/1), C24H24ClN7O8Zn
 - Crystal structure of 2-amino-4-(3,5-dibromo-4-hydroxyphenyl)-7-methyl-5-oxo-2H,5H-pyrano[4,3-b]pyran-3-carbonitrile, C16H10Br2N2O4
 - Crystal structure of catena-poly[diaqua-(μ2-3,5-bis(pyridin-4-ylmethoxy)benzoate-κ2N:O) manganese(II)] tetrahydrate [(3,5-bis-(pyridin-4-ylmethoxy)-benzoic-κ1Oκ1N) manganese(II)] trihydrate, C38H42MnN4O14
 - The crystal structure of 2-carboxybenzaldehyde-2-phenylacetohydrazone, C16H14N2O3
 - The crystal structure of poly[μ2-aqua-(μ2-2-naphthylamine-1-sulfonato-κ3O,O′:O′′)sodium(I)], C10H10N1O4S1Na
 - The crystal structure of phthalazin-1(2H)-one, C8H6N2O1
 - Crystal structure of 3,5-bis(trifluoromethyl)benzyl(Z)-N-(adamantan-1-yl)morpholine-4-carbothioimidate, C24H28F6N2OS
 - Crystal structure of diazido-bis(μ2-pyridin-2-ylmethanolato-κ2N:O)-bis(pyridin-2-ylmethanolato-κ2N,O)dicobalt(III) – methanol (1/3), C27H35Co2N10O7
 - Crystal structure of N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-3-(2,2,2-trifluoroethoxy)-2-pyridinesulfonamide, C14H14F3N5O6S
 - Crystal structure of 1-phenyl-N′-(1-phenyl-5-(thiophen-2-yl)-1H-pyrazole-3-carbonyl)-5-(thiophen-2-yl)-1H-pyrazole-3-carbohydrazide, C28H20N6O2S2
 - The crystal structure of poly[bis(4-hydroxybenzoato-κO)-(μ2-4,4′-bipyridine-κ2N:N′)copper(II)] hydrate, C24H20N2O7Cu
 - Crystal structure of poly[μ3-5-(4-(2,6-di(pyridine-2-yl)pyridine-4-yl)phenoxy)isophthalato-κ5O:O′,O′′:N,N′,N′′cobalt(II)], C29H17CoN3O5
 - Crystal structure of poly[μ3-5-(4-(2,6-di(pyridine-2-yl)pyridine-4-yl)phenoxy)isophthalato-κ6O:O′,O′′:N,N′,N′′)cobalt(II)] C29H17CoN3O5
 - Crystal structure of diaqua-(acetato-κ3O,O′:O′′)-(μ3-4,6-di(1H-imidazol-1-yl)isophthalato-κ4O:O′:O′′,O′′′)lanthanum(III), C16H15LaN4O8
 - Synthesis and crystal structure of 6-carboxy-1-(3,5-dicarboxyphenyl)-1H-benzo[d]imidazol-3-ium-5-carboxylate dihydrate, C18H12N2O8
 - Crystal structure of (E)-2-hydroxybenzaldehyde O-(2-(((E)-(4-(dimethylamino)benzylidene)amino)oxy)ethyl)oxime, C18H21N3O3
 - Crystal structure of bis{2-((E)-((4-((E)-1-(methoxyimino)ethyl)phenyl)imino)methyl)phenolato-κ2N,O}zinc(II), C32H30N4O4Zn
 - Crystal structure of bis(9-aminoacridin-10-ium) tetrachloridocuprate(II) monohydrate, C26H24Cl4CuN4O
 - The crystal structure of 4-tert-butyl-N′-[(E)-(4-fluoro-3-methoxyphenyl)methylidene]benzohydrazide, C19H21F1N2O2
 - Crystal structure of (E)-3-(3-(5-methyl-1-4-tolyl-1H-1,2,3-triazol-4-yl)-1-phenyl-1H-pyrazol-4-yl)-1-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)prop-2-en-1-one, C31H26N8O
 - Crystal structure of (E)-N′-(4-methoxybenzylidene)-5-methyl-1-(4-tolyl)-1H-1,2,3-triazole-4-carbohydrazide, C19H19N5O2
 - Crystal structure and molecular packing of O-ethyl (2-chlorophenyl)carbamothioate, C9H10ClNOS
 - Crystal structure of pyrene-2-carbaldehyde, C17H10O
 - Crystal structure of (E)-2,4-diiodo-6-(4-methyl-2-nitrostyryl)phenol, C14H10I2N2O3
 - Crystal structure of (E)-2,4-dichloro-6-(((4-methoxy-2-nitrophenyl)imino)methyl)phenol, C14H10Cl2N2O4
 - Crystal structure of (E)-2-bromo-4-chloro-6-(4-methoxy-2-nitrostyryl)phenol, C14H10BrClN2O4
 - Crystal structure of (E)-4,6-diiodo-2-(((4-methoxy-2-nitrophenyl)imino)methyl)-3-methylphenol, C14H10I2N2O4
 - The crystal structure of 7-bromo-1-cyclopropyl-8-methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid an intermediate of the ozenoxacin synthesis, C14H12BrNO3
 - Crystal structure of bis(N-(1-(pyrazin-2-yl)ethylidene)nicotinohydrazonato-κ3N,N′,O)copper(II) C24H20N10O2Cu
 - Crystal structure of diaqua-dinitrato-k2O,O′((Z)-N-((E)-1-(pyrazin-2-yl)ethylidene)nicotinohydrazonato-k3N,N′,O)europium(II), C12H14N7O9Eu
 - Crystal structure of ethyl 4-amino-5-(5-methyl-1-(4-tolyl)-1H-1,2,3-triazole-4-carbonyl)-2-(phenylamino)thiophene-3-carboxylate, C24H23N5O3S
 - The crystal structure of acridin-10-ium2-carboxybenzoate, C21H15NO4
 - The crystal structure of 3-((phenylamino)methylene)-1,5-dioxaspiro[5.5]undecane-2,4-dione, C16H17N1O4
 - Crystal structure of 12-chloro-5,6,7,12-tetrahydrodibenzo[c,f][1,5]oxastibocine, C14H12ClOSb
 - Crystal structure of 4-((1,3-dioxoisoindolin-2-yl)methyl)phenethyl 4-methylbenzenesulfonate, C24H21NO5S
 - Crystal structure of 3-methyl-2,3-dihydro-2-thioxoquinazolin-4(1H)-one, C9H8N2OS
 - Crystal structure of tert-butyl (2-(4-oxo-2-thioxo-1,4-dihydroquinazolin-3(2H)-yl)ethyl)carbamate, C15H19N3O3S
 - Crystal structure of ethyl 5-formyl-3,4-dimethylpyrrole-2-carboxylate–1-(propan-2-ylidene)thiosemicarbazide (1/1), C14H22N4O3S
 - Crystal structure of bis-(N′-(5-ethoxycarbonyl-3,4-dimethyl-pyrrol-2-yl-methylidene)-3-hydroxybenzohydrazide-κ2O,N)copper(II) – dimethylformamide (1/2), C40H50N8O10Cu
 - Crystal structure of bis(acetato-κO)bis{2-((1H-tetrazol-1-yl)methyl)-1H-benzo[d]imidazole-κN}zinc(II), C22H22N12O4Zn
 - Crystal structure of 4-phenyl-3-((4-phenyl-1H-1,2,3-triazol-1-yl)methyl)-1H-1,2,4-triazole-5(4H)-thione, C17H14N6S
 - Crystal structure of (Z)-N-(4-nitrophenyl)-3-phenyl-3-(phenylamino)acrylamide, C21H17N3O3
 - Crystal structure of 1,1′-(pentane-1,5-diyl)bis(3-methyl-1H-imidazol-3-ium)bis(hexafluorophosphate), C13H22F12N4P2
 - Synthesis and crystal structure of bis(furan-2-ylmethanaminium)-catena-[bis(μ2-phthalato-κ2O:O′)cobalt(II)], C26H24CoN2O10
 - Crystal structure of methyl (R)-4-(o-chlorobenzoyl)-1-thia-4-azaspiro[4.5]decane-3-carboxylate, C17H20ClNO3S
 - Crystal structure of 2-[[4-[2-[4-(4-methoxyphenyl)-1-piperazinyl]ethyl]phenyl] methyl]-1H-isoindole-1,3(2H)-dione, C28H29N3O3
 - The crystal structure of benzenaminium 5,7-dihydroxy-4-oxo-2-phenyl-4H-chromene-8-sulfonate hydrate, C21H19NO8S
 - Crystal structure of semiconducting potassium poly[(μ2-tetraselenido-κ2Se1:Se4)(μ2-pentaselenido-κ1Se1:Se1)argentate(I)], K3AgSe9
 - Crystal structure of 2-isopropyl-8-methyl-phenanthrene-3,4-dione, C18H16O2
 - Crystal structure of 2-isopropyl-8,8-dimethyl-5,6,7,8-tetrahydrophenanthrene-3,4-dione, C19H22O2
 - Crystal structure of (E)-2-(1-((2-aminophenyl)imino)ethyl)-4-bromophenol, C14H13BrN2O
 - Crystal structure of 1,1-di(4-cyanophenyl)-2,2-diphenylethene, C28H18N2
 - Crystal structure of bis(hydroxylamido-κ2O,N)-oxido(1H-pyrazole-3-carboxylato-κ2O,N)vanadium(V), C4H7N4O5V
 - The crystal structure of In1.2B3O5.6(OH)1.4
 - The crystal structure of chlorido(2-(1H-pyrazol-3-yl)phenolato-κ2N,O)(2-(1H-pyrazol-3-yl)phenol-κN)copper(II), C18H15ClCuN4O2
 - Crystal structure of 1-heptylpyridazin-1-ium iodide, C11H19N2I
 - The crystal structure of N-butylpyridinium bis(μ2-dichlorido)-tetrachloridodicopper(II), C18H28N2Cu2Cl6
 - Crystal structure of 6-hydroxy-5-((2-hydroxy-6-oxocyclohex-1-en-1-yl)(4-methoxyphenyl)methyl)-1,3-dimethylpyrimidine-2,4(1H,3H)-dione, C20H22N2O6
 - Crystal structure of bis(acetonitrile)-diaqua-dichloridoiron(II), C4H10Cl2N2O2Fe
 
Articles in the same Issue
- Cover and Frontmatter
 - Crystal structure of (E)-1-(4-(((E)-2-hydroxy-5-methylbenzylidene)amino)phenyl)ethan-1-one O-methyl oxime, C17H18N2O2
 - Crystal structure of 1,3,5,7-tetraazaadamantane-1,3-diium 2,5-dicarboxyterephthalate, C16H18N4O8
 - Crystal structure of guanidinium tetrabutyl-ammonium 5-hydroxyisophthalate dihydrate, C25H50N4O7
 - Crystal structure of poly[aqua-(μ2-5-methoxyisophthalate-κ3O,O′:O′′)-(μ2-1,4-bis((1H-1,2,4-triazol-1-yl)methyl)benzene-κ2N:N′)nickel(II), NiC21H20N6O6
 - Crystal structure of aqua-bis(3,4-dimethoxybenzoato-κ1O)-(2,2′-bipyridine-κ2N,N′)copper(II), C28H26CuN2O9
 - Crystal structure of catena-poly[aqua-(μ2-(3,5-di(1H-imidazol-1-yl)-pyridine-κ2N:N′)-(μ2-2-(carboxylatomethyl)benzoato-κ2O:O′)] cadmium(II), C20H17CdN5O5
 - The crystal structure of catena-poly[chlorido-(μ2-5-methyl-1,3,4-thiadiazole-2-thiolato-κ2S:N)mercury(II)], C3H3ClHgN2S2
 - Crystal structure of (E)-2,4-dichloro-6-(((4-methyl-2-nitrophenyl)imino)methyl)phenol, C14H10Cl2N2O3
 - Crystal structure of a new polymorph of bis[μ-1,3-bis(diphenylphosphino)propane-κ2P:P′-disilver(I)] bis(tetrafluoroborate), [Ag(dppp)]2(BF4)2, C54H52Ag2B2F8P4
 - The crystal structure of 2-phenyl-4,6-bis(R-tert-butylsulfonamido)-1,3,5-triazine – ethyl acetate (2/1), C38H58N10O6S4
 - Crystal structure of 6-amino-8-(2-methoxy-phenyl)-2-methyl-2,3,8,8a-tetrahydro-1H-iso-quinoline-5,7,7-tricarbonitrile monohydrate, C20H21N5O2
 - Crystal structure of methyl (1-phenylethyl)carbamate, C10H13NO2
 - Crystal structure of dimethanol-(μ2-squarato-κ2O:O′)-tetrakis(tri-p-tolylphosphane-κP)disilver(I) – methanol (1/2), C92H98Ag2O8P4
 - Crystal structure of catena-poly[bis(μ2-1,4-bis(triazol-1-ylmethyl)benzene-κ2N:N′)-bis(5-tert-butyl-isophthalate-κO)copper(II)]tetrahydrate, C36H46CuN6O12
 - Crystal structure of 4-aminopyridinium 4-acetyl-(pyridin-4-yl)-1H-1,2,3-triazol-5-olate monohydrate, C14H16N6O3
 - Crystal structure of 2-(8-bromo-2-phenylimidazo[1,2-α]pyridin-3-yl)-6,7-dimethyl-3-phenylquinoxaline, C29H21BrN4
 - Crystal structure of aqua(1-(2-pyridyl)ethanone oxime-κ2N,N′)(1-(2-pyridyl)ethanone oximato-κ2N,N′) nitrate monohydrate, C14H19N5O7Cu
 - Crystal structure of poly[tetraaqua-(μ4-oxalato-κ4O,O′:O′′,O′′′)-(μ8-benzene-1,2,4,5-tetracarboxylato-κ8O1:O2:O3:O4:O5:O6:O7:O8)yttrium(III)], C6H5O8Y
 - Crystal structure of bis{catena-poly[(μ2-1,2-bis(4-pyridyl)ethane-κ2N:N′)silver(I)]} diaqua-bis(5-(4-carboxyphenyl)pyridine-2-carboxylato-κ2N,O)-(μ2-1,2-bis(4-pyridyl)ethane-κ2N:N′)disilver(I) octahydrate, C31H35Ag2N4O9
 - Crystal structure of (E)-N-(2-(benzylamino)-2-oxo-1-(4-oxo-4H-chromen-3-yl)ethyl)-N-(4-bromophenyl)-3-chloroacrylamide hydrate, C27H22BrClN2O5
 - Crystal structure of catena-poly[octaaqua-bis(μ2-4,6-dicarboxyisophthalate-κ2O:O′)cadmium(II)disodium(I)] dihydrate, C20H28CdNa2O26
 - Crystal structure of acetonitrile{bis(2-benzimidazolylmethyl)amine-κ3N,N′,N′′}-{maleato-κO}zinc(II) perchlorate - acetonitrile (1/1), C24H24ClN7O8Zn
 - Crystal structure of 2-amino-4-(3,5-dibromo-4-hydroxyphenyl)-7-methyl-5-oxo-2H,5H-pyrano[4,3-b]pyran-3-carbonitrile, C16H10Br2N2O4
 - Crystal structure of catena-poly[diaqua-(μ2-3,5-bis(pyridin-4-ylmethoxy)benzoate-κ2N:O) manganese(II)] tetrahydrate [(3,5-bis-(pyridin-4-ylmethoxy)-benzoic-κ1Oκ1N) manganese(II)] trihydrate, C38H42MnN4O14
 - The crystal structure of 2-carboxybenzaldehyde-2-phenylacetohydrazone, C16H14N2O3
 - The crystal structure of poly[μ2-aqua-(μ2-2-naphthylamine-1-sulfonato-κ3O,O′:O′′)sodium(I)], C10H10N1O4S1Na
 - The crystal structure of phthalazin-1(2H)-one, C8H6N2O1
 - Crystal structure of 3,5-bis(trifluoromethyl)benzyl(Z)-N-(adamantan-1-yl)morpholine-4-carbothioimidate, C24H28F6N2OS
 - Crystal structure of diazido-bis(μ2-pyridin-2-ylmethanolato-κ2N:O)-bis(pyridin-2-ylmethanolato-κ2N,O)dicobalt(III) – methanol (1/3), C27H35Co2N10O7
 - Crystal structure of N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-3-(2,2,2-trifluoroethoxy)-2-pyridinesulfonamide, C14H14F3N5O6S
 - Crystal structure of 1-phenyl-N′-(1-phenyl-5-(thiophen-2-yl)-1H-pyrazole-3-carbonyl)-5-(thiophen-2-yl)-1H-pyrazole-3-carbohydrazide, C28H20N6O2S2
 - The crystal structure of poly[bis(4-hydroxybenzoato-κO)-(μ2-4,4′-bipyridine-κ2N:N′)copper(II)] hydrate, C24H20N2O7Cu
 - Crystal structure of poly[μ3-5-(4-(2,6-di(pyridine-2-yl)pyridine-4-yl)phenoxy)isophthalato-κ5O:O′,O′′:N,N′,N′′cobalt(II)], C29H17CoN3O5
 - Crystal structure of poly[μ3-5-(4-(2,6-di(pyridine-2-yl)pyridine-4-yl)phenoxy)isophthalato-κ6O:O′,O′′:N,N′,N′′)cobalt(II)] C29H17CoN3O5
 - Crystal structure of diaqua-(acetato-κ3O,O′:O′′)-(μ3-4,6-di(1H-imidazol-1-yl)isophthalato-κ4O:O′:O′′,O′′′)lanthanum(III), C16H15LaN4O8
 - Synthesis and crystal structure of 6-carboxy-1-(3,5-dicarboxyphenyl)-1H-benzo[d]imidazol-3-ium-5-carboxylate dihydrate, C18H12N2O8
 - Crystal structure of (E)-2-hydroxybenzaldehyde O-(2-(((E)-(4-(dimethylamino)benzylidene)amino)oxy)ethyl)oxime, C18H21N3O3
 - Crystal structure of bis{2-((E)-((4-((E)-1-(methoxyimino)ethyl)phenyl)imino)methyl)phenolato-κ2N,O}zinc(II), C32H30N4O4Zn
 - Crystal structure of bis(9-aminoacridin-10-ium) tetrachloridocuprate(II) monohydrate, C26H24Cl4CuN4O
 - The crystal structure of 4-tert-butyl-N′-[(E)-(4-fluoro-3-methoxyphenyl)methylidene]benzohydrazide, C19H21F1N2O2
 - Crystal structure of (E)-3-(3-(5-methyl-1-4-tolyl-1H-1,2,3-triazol-4-yl)-1-phenyl-1H-pyrazol-4-yl)-1-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)prop-2-en-1-one, C31H26N8O
 - Crystal structure of (E)-N′-(4-methoxybenzylidene)-5-methyl-1-(4-tolyl)-1H-1,2,3-triazole-4-carbohydrazide, C19H19N5O2
 - Crystal structure and molecular packing of O-ethyl (2-chlorophenyl)carbamothioate, C9H10ClNOS
 - Crystal structure of pyrene-2-carbaldehyde, C17H10O
 - Crystal structure of (E)-2,4-diiodo-6-(4-methyl-2-nitrostyryl)phenol, C14H10I2N2O3
 - Crystal structure of (E)-2,4-dichloro-6-(((4-methoxy-2-nitrophenyl)imino)methyl)phenol, C14H10Cl2N2O4
 - Crystal structure of (E)-2-bromo-4-chloro-6-(4-methoxy-2-nitrostyryl)phenol, C14H10BrClN2O4
 - Crystal structure of (E)-4,6-diiodo-2-(((4-methoxy-2-nitrophenyl)imino)methyl)-3-methylphenol, C14H10I2N2O4
 - The crystal structure of 7-bromo-1-cyclopropyl-8-methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid an intermediate of the ozenoxacin synthesis, C14H12BrNO3
 - Crystal structure of bis(N-(1-(pyrazin-2-yl)ethylidene)nicotinohydrazonato-κ3N,N′,O)copper(II) C24H20N10O2Cu
 - Crystal structure of diaqua-dinitrato-k2O,O′((Z)-N-((E)-1-(pyrazin-2-yl)ethylidene)nicotinohydrazonato-k3N,N′,O)europium(II), C12H14N7O9Eu
 - Crystal structure of ethyl 4-amino-5-(5-methyl-1-(4-tolyl)-1H-1,2,3-triazole-4-carbonyl)-2-(phenylamino)thiophene-3-carboxylate, C24H23N5O3S
 - The crystal structure of acridin-10-ium2-carboxybenzoate, C21H15NO4
 - The crystal structure of 3-((phenylamino)methylene)-1,5-dioxaspiro[5.5]undecane-2,4-dione, C16H17N1O4
 - Crystal structure of 12-chloro-5,6,7,12-tetrahydrodibenzo[c,f][1,5]oxastibocine, C14H12ClOSb
 - Crystal structure of 4-((1,3-dioxoisoindolin-2-yl)methyl)phenethyl 4-methylbenzenesulfonate, C24H21NO5S
 - Crystal structure of 3-methyl-2,3-dihydro-2-thioxoquinazolin-4(1H)-one, C9H8N2OS
 - Crystal structure of tert-butyl (2-(4-oxo-2-thioxo-1,4-dihydroquinazolin-3(2H)-yl)ethyl)carbamate, C15H19N3O3S
 - Crystal structure of ethyl 5-formyl-3,4-dimethylpyrrole-2-carboxylate–1-(propan-2-ylidene)thiosemicarbazide (1/1), C14H22N4O3S
 - Crystal structure of bis-(N′-(5-ethoxycarbonyl-3,4-dimethyl-pyrrol-2-yl-methylidene)-3-hydroxybenzohydrazide-κ2O,N)copper(II) – dimethylformamide (1/2), C40H50N8O10Cu
 - Crystal structure of bis(acetato-κO)bis{2-((1H-tetrazol-1-yl)methyl)-1H-benzo[d]imidazole-κN}zinc(II), C22H22N12O4Zn
 - Crystal structure of 4-phenyl-3-((4-phenyl-1H-1,2,3-triazol-1-yl)methyl)-1H-1,2,4-triazole-5(4H)-thione, C17H14N6S
 - Crystal structure of (Z)-N-(4-nitrophenyl)-3-phenyl-3-(phenylamino)acrylamide, C21H17N3O3
 - Crystal structure of 1,1′-(pentane-1,5-diyl)bis(3-methyl-1H-imidazol-3-ium)bis(hexafluorophosphate), C13H22F12N4P2
 - Synthesis and crystal structure of bis(furan-2-ylmethanaminium)-catena-[bis(μ2-phthalato-κ2O:O′)cobalt(II)], C26H24CoN2O10
 - Crystal structure of methyl (R)-4-(o-chlorobenzoyl)-1-thia-4-azaspiro[4.5]decane-3-carboxylate, C17H20ClNO3S
 - Crystal structure of 2-[[4-[2-[4-(4-methoxyphenyl)-1-piperazinyl]ethyl]phenyl] methyl]-1H-isoindole-1,3(2H)-dione, C28H29N3O3
 - The crystal structure of benzenaminium 5,7-dihydroxy-4-oxo-2-phenyl-4H-chromene-8-sulfonate hydrate, C21H19NO8S
 - Crystal structure of semiconducting potassium poly[(μ2-tetraselenido-κ2Se1:Se4)(μ2-pentaselenido-κ1Se1:Se1)argentate(I)], K3AgSe9
 - Crystal structure of 2-isopropyl-8-methyl-phenanthrene-3,4-dione, C18H16O2
 - Crystal structure of 2-isopropyl-8,8-dimethyl-5,6,7,8-tetrahydrophenanthrene-3,4-dione, C19H22O2
 - Crystal structure of (E)-2-(1-((2-aminophenyl)imino)ethyl)-4-bromophenol, C14H13BrN2O
 - Crystal structure of 1,1-di(4-cyanophenyl)-2,2-diphenylethene, C28H18N2
 - Crystal structure of bis(hydroxylamido-κ2O,N)-oxido(1H-pyrazole-3-carboxylato-κ2O,N)vanadium(V), C4H7N4O5V
 - The crystal structure of In1.2B3O5.6(OH)1.4
 - The crystal structure of chlorido(2-(1H-pyrazol-3-yl)phenolato-κ2N,O)(2-(1H-pyrazol-3-yl)phenol-κN)copper(II), C18H15ClCuN4O2
 - Crystal structure of 1-heptylpyridazin-1-ium iodide, C11H19N2I
 - The crystal structure of N-butylpyridinium bis(μ2-dichlorido)-tetrachloridodicopper(II), C18H28N2Cu2Cl6
 - Crystal structure of 6-hydroxy-5-((2-hydroxy-6-oxocyclohex-1-en-1-yl)(4-methoxyphenyl)methyl)-1,3-dimethylpyrimidine-2,4(1H,3H)-dione, C20H22N2O6
 - Crystal structure of bis(acetonitrile)-diaqua-dichloridoiron(II), C4H10Cl2N2O2Fe