共查询到20条相似文献,搜索用时 15 毫秒
1.
Colin J. Burchell George Ferguson Alan J. Lough Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(3):311-314
Tet-b (racemic 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane, C16H36N4) and trimesic acid (1,3,5-benzenetricarboxylic acid, C9H6O6) form a salt partially solvated by both water and methanol, i.e. 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane–1,3,5-benzenetricarboxylic acid–methanol–water (1/1/0.78/1.12), C16H38N42+·C9H4O62−·0.78CH4O·1.12H2O. The anions are linked by O—H⃛O hydrogen bonds [O⃛O 2.442 (4) and 2.458 (4) Å; O—H⃛O 170 and 171°] into zigzag chains; orientationally disordered cations are linked to the anion chains by means of N—H⃛O hydrogen bonds [major orientation: N⃛O 2.695 (3)–3.071 (4) Å, N—H⃛O 148–179°; minor orientation: N⃛O 2.75 (2)–3.34 (2) Å, N—H⃛O 147–170°] and link the chains into sheets. The solvent molecules are all disordered, but appear to play no significant structural role apart from space filling. 相似文献
2.
Yalc˛ın Elerman Hülya Kara Keith Prout Andrew Johnston 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(10):1222-1224
The title compound, C9H19N3O·C4H7NO2, displays strong intramolecular O—H⃛N [O⃛N 2.6743 (13) Å] and N—H⃛N [N⃛N 2.6791 (15) Å] hydrogen bonds, and strong intermolecular O—H⃛N [O⃛N 2.7949 (15) Å] and N—H⃛O [N⃛O 3.0924 (16) Å] hydrogen bonds. This creates chains of perhydropyrimidine molecules, linked by hydrogen bonds. Each chain is linked to a partner chain, through hydrogen bonds to two butane-2,3-dione monooxime molecules, in a structure reminiscent of a ladder. 相似文献
3.
Samuel Sakwa Kraig A. Wheeler 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(6):o332-o334
The title compounds, bis(ammonium) naphthalene‐1,5‐disulfonate, 2NH4+·C10H6O6S22−, and bis[1‐(hydroxymethyl)‐3,5,7‐triaza‐1‐azoniatricyclo[3.3.1.13,7]decane] 1,5‐naphthalenedisulfonate, 2C7H15N4O+·C10H6O6S22−, were prepared from the acid‐promoted reaction of hexamethylenetetramine. In both structures, the disulfonate anion is positioned on an inversion center, with each sulfonate group contributing to the supramolecular assemblies via hydrogen bonds. The ammonium cations are linked to sulfonate groups by four distinct N+—H⃛−O—S contacts [N⃛O = 2.846 (2)–2.898 (2) Å and N—H⃛O = 160 (2)–175 (2)°], whereas the 1‐(hydroxymethyl)‐3,5,7‐triaza‐1‐azoniatricyclo[3.3.1.13,7]decane cations form one O—H⃛−O—S [O⃛O = 2.628 (2) Å and O—H⃛O = 176°] and three C—H⃛−O—S [C⃛O = 3.359 (2)–3.380 (2) Å and C—H⃛O = 148–155°] interactions to neighboring sulfonate groups. 相似文献
4.
Srinivasulu Aitipamula Ashwini Nangia Ram Thaimattam Mariusz Jasklski 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(8):o481-o484
In tris(4‐hydroxyphenyl)methane (or 4,4′,4′′‐methanetriyltriphenol), C19H16O3, molecules are connected by O—H⃛O hydrogen bonds [O⃛O = 2.662 (2) and 2.648 (2) Å] into two‐dimensional square networks that are twofold interpenetrated. In tris(4‐hydroxyphenyl)methane–4,4′‐bipyridine (1/1), C19H16O3·C10H8N2, trisphenol molecules form rectangular networks via O—H⃛O [O⃛O = 2.694 (3) Å] and C—H⃛O [C⃛O = 3.384 (3) Å] hydrogen bonds. Bipyridine molecules hydrogen bonded to phenol moieties [O⃛N = 2.622 (3) and 2.764 (3) Å] fill the voids to complete the structure. 相似文献
5.
Katharine F. Bowes George Ferguson Alan J. Lough Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(6):o329-o331
The title compound is a methanol‐solvated salt, C16H38N42+·C4H4O52−·2CH3OH, in which the ionic components are linked into chains by two pairs of N—H⃛O hydrogen bonds [H⃛O = 1.78–2.21 Å, N⃛O = 2.702 (14)–3.094 (8) Å and N—H⃛O = 160–179°]. The methanol molecules are pendent from the chain and are linked to it by O—H⃛O hydrogen bonds [H⃛O = 1.86 and 1.89 Å, O⃛O = 2.691 (9) and 2.708 (16) Å, and O—H⃛O = 168 and 165°]. 相似文献
6.
Katharine F. Bowes George Ferguson Alan J. Lough Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(8):o464-o466
In the title compound, C13H16N22+·2C2H4O5P−, the cation lies across a twofold rotation axis in space group Fdd2. The anions are linked into molecular ladders by two O—H⃛O hydrogen bonds [H⃛O = 1.73 and 1.77 Å, O⃛O = 2.538 (2) and 2.598 (3) Å, and O—H⃛O = 160 and 170°], these ladders are linked into sheets by a single type of N—H⃛O hydrogen bond [H⃛O = 1.75 Å, N⃛O = 2.624 (3) Å and N—H⃛O = 171°] and the sheets are linked into a three‐dimensional framework by a single type of C—H⃛O hydrogen bond [H⃛O = 2.48 Å, C⃛O = 3.419 (4) Å and C—H⃛O = 167°]. 相似文献
7.
Katharine F. Bowes George Ferguson Alan J. Lough Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(3):o147-o149
The title compound is an ethanol‐solvated salt, C16H38N42+·2C11H7O2−·2C2H6O, in which the cation lies across a centre of inversion in P21/c. The ions are linked by N—H⃛O hydrogen bonds [H⃛O = 1.70 and 2.30 Å, N⃛O = 2.624 (2) and 3.136 (2) Å, and N—H⃛O = 178 and 151°], and the ethanol molecule is linked to the anion by an O—H⃛O hydrogen bond [H⃛O = 1.90 Å, O⃛O = 2.728 (2) Å and O—H⃛O = 171°], to form a centrosymmetric five‐component aggregate. C—H⃛O hydrogen bonds and aromatic π–π‐stacking interactions are absent, but the aggregates are linked into sheets by a single C—H⃛π(arene) hydrogen bond. 相似文献
8.
Antonio Quesada Antonio Marchal John N. Low Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(3):o102-o104
In the title compound, C14H23N6O2+·HSO4−·H2O, the pyrimidinium ring of the cation adopts a twist‐boat conformation, induced by steric clashes between adjacent ring substituents; the anions and the water molecules are linked by three O—H⃛O hydrogen bonds [H⃛O = 1.70–1.78 Å, O⃛O = 2.548 (2)–2.761 (2) Å and O—H⃛O = 161–168°] into chains of edge‐fused R(12) rings, which are linked into sheets by the cations, via three N—H⃛O hydrogen bonds [H⃛O = 1.96–2.17 Å, N⃛O = 2.820 (2)–2.935 (2) Å and N—H⃛O = 145–173°]. 相似文献
9.
Christopher Glidewell John N. Low Janet M. S. Skakle James L. Wardell 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(3):o95-o97
Molecules of the title compound, C12H9IN2O2S, are linked by one N—H⃛O hydrogen bond [H⃛O = 2.16 Å, N⃛O = 2.935 (4) Å and N—H⃛O 147°] and two C—H⃛O hydrogen bonds [H⃛O both 2.49 Å, C⃛O = 3.231 (5) and 3.220 (5) Å, and C—H⃛O = 135 and 134°] into sheets which themselves are weakly linked by an aromatic π–π‐stacking interaction between iodinated rings in centrosymmetrically related molecules. There are no iodo–nitro interactions. 相似文献
10.
Christopher Glidewell John N. Low Manuel Melguizo Antonio Quesada 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(4):o202-o204
Molecules of the title compound, C6H9N3O2, are linked by an N—H⃛O hydrogen bond [H⃛O = 2.29 Å, N⃛O = 3.169 (2) Å and N—H⃛O = 173°] and an N—H⃛N hydrogen bond [H⃛N = 2.12 Å, N⃛N = 2.999 (2) Å and N—H⃛N = 175°] into sheets containing centrosymmetric R(8) and R(28) rings; the sheets are reinforced by a single aromatic π–π‐stacking interaction. 相似文献
11.
Tuncer Hökelek Muhammed Işıklan Zeynel Kılıç 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(1):117-119
In the title compound, C18H17N3O2, a strong intramolecular O—H⃛N hydrogen bond [N⃛O 2.607 (3), O—H 0.97 (3) and H⃛N 1.71 (3) Å, and O—H⃛N 153 (2)°] was observed, which leads to a unique phenol–imine tautomerism in the solid state. The C=N imine bond distance and the C—N—C bond angle [1.287 (2) Å and 121.7 (1)°, respectively] indicate the existence of this phenol–imine tautomer. In solution, the phenol–imine tautomer of the title free Schiff base ligand is dominant in both polar and non-polar solvents, as supported by 1H NMR and UV–visible spectroscopic data. 相似文献
12.
M. Luz Godino Salido M. Dolores Gutirrez Valero John N. Low Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(6):o340-o342
Molecules of the title compound, C5H6N4O3, are linked into a single three‐dimensional framework by a two‐centre N—H⃛O hydrogen bond [H⃛O = 1.92 Å, N⃛O = 2.785 (2) Å and N—H⃛O = 168°], a two‐centre N—H⃛H hydrogen bond [H⃛N = 2.19 Å, N⃛N = 3.017 (2) Å and N—H⃛N = 157°] and the intermolecular component of an effectively planar three‐centre N—H⃛(O)2 hydrogen bond [H⃛O = 2.03 and 2.31 Å, N⃛O = 2.645 (2) and 2.957 (2) Å, N—H⃛O = 126 and 130°, and O⃛H⃛O = 101°]. 相似文献
13.
Elizabeth J. MacLean Simon J. Teat Dorcas M. M. Farrell George Ferguson Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(8):o470-o473
The title compound, meso‐5,7,7,12,14,14‐hexamethyl‐4,11‐diaza‐1,8‐diazoniacyclotetradecane bis(3‐carboxy‐5‐nitrobenzoate), C16H38N42+·2C8H4NO6?, is a salt in which the cation is present as two configurational isomers, disordered across a common centre of inversion in P, with occupancies of 0.847 (3) and 0.153 (3). The anions are linked into chains by a single O—H?O hydrogen bond [H?O 1.71 Å, O?O 2.5063 (15) Å and O—H?O 156°] and the cations link these anion chains into sheets by means of a range of N—H?O hydrogen bonds [H?O 1.81–2.53 Å, N?O 2.718 (5)–3.3554 (19) Å and N—H?O 146–171°]. 相似文献
14.
John A. Cowan J. A. K. Howard M. A. Leech 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(3):302-303
2,5-Dihydroxy-1,4-benzoquinone (DHBQ) and 4,4′-bipyridine (BPY) crystallize in a 1:1 ratio as a neutral molecular adduct, C6H4O4·C10H8N2, in space group C2/c, with half of each molecule in the asymmetric unit. The molecules are linked by a strong O—H⃛N hydrogen bond [O⃛N 2.6323 (15) Å] and a weak C—H⃛O hydrogen bond [C⃛O 3.2082 (17) Å] to form infinite stacks of parallel one-dimensional hydrogen-bonded ribbons. The two rings of the bipyridine are twisted at 28.3° with respect to each other, and the benzoquinone ring is inclined at an angle of 18.3° with respect to the plane of the neighbouring pyridine ring. The 4,4′-bipyridine molecule lies on a twofold axis and the benzoquinone molecule lies across an inversion centre. 相似文献
15.
Choudhury M. Zakaria George Ferguson Alan J. Lough Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):m5-m7
In ferrocene‐1,1′‐diylbis(diphenylmethanol)–2,2′‐dipyridylamine (1/1), [Fe(C18H15O)2]·C10H9N3, (I), there is an intramolecular O—H?O hydrogen bond [H?O 2.03 Å, O?O 2.775 (2) Å and O—H?O 147°] in the ferrocenediol component, and the two neutral molecular components are linked by one O—H?N hydrogen bond [H?N 1.96 Å, O?N 2.755 (2) Å and O—H?N, 157°] and one N—H?O hydrogen bond [H?O 2.26 Å, N?O 3.112 (2) Å and N—H?O 164°] forming a cyclic R(8) motif. One of the pyridyl N atoms plays no part in the intermolecular hydrogen bonding, but participates in a short intramolecular C—H?N contact [H?N 2.31 Å, C?N 2.922 (2) Å and C—H?N 122°]. 相似文献
16.
Paloma Arranz Mascars Rafael Cuesta Martos Christopher Glidewell John N. Low 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(6):o326-o328
In the title compound, NH4+·C7H8N5O4−·H2O, the independent components are linked into bilayers by an extensive series of two‐centre N—H⃛O hydrogen bonds [H⃛O = 1.85–1.96 Å, N⃛O = 2.776 (2)–2.840 (2) Å and N—H⃛O = 149–172°], and by asymmetric three‐centre N—H⃛(O)2, O—H⃛(N,O) and O—H⃛(O)2 hydrogen bonds. 相似文献
17.
George Ferguson Christopher Glidewell John N. Low Janet M. S. Skakle James L. Wardell 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(3):315-316
Molecules of 2-methyl-4-nitroaniline, C7H8N2O2, act as double donors and as double acceptors of N—H⃛O hydrogen bonds [N⃛O 3.117 (3) and 3.239 (3) Å; N—H⃛O 169 and 136°]. The molecules are thereby linked into a three-dimensional framework. 相似文献
18.
Antonio Quesada Manuel Melguizo John N. Low Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(7):o400-o402
The title compound, C18H17N3O2, crystallizes with Z′ = 2 in space group P21/c, and the two independent molecules are approximate, but not exact, mirror images. The molecular–electronic structure is strongly polarized, and the molecules are linked by paired N—H⃛O hydrogen bonds [H⃛O = 2.00–2.23 Å, N⃛O = 2.798 (3)–2.992 (3) Å and N—H⃛O = 145–151°] into two independent C(4)C(6)[(6)] chains of rings, which are linked into sheets by a single aromatic π–π‐stacking interaction. 相似文献
19.
Carlos E. M. Carvalho Solange M. S. V. Wardell James L. Wardell Janet M. S. Skakle John N. Low Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(1):o28-o32
Molecules of the title compounds N2‐(benzoyloxy)benzamidine, C14H12N2O2, (I), N2‐(2‐hydroxybenzoyloxy)benzamidine, C14H12N2O3, (II), and N2‐benzoyloxy‐2‐hydroxybenzamidine, C14H12N2O3, (III), all have extended chain conformations, with the aryl groups remote from one another. In (I), the molecules are linked into chains by a single N—H⋯N hydrogen bond [H⋯N = 2.15 Å, N⋯N = 3.029 (2) Å and N—H⋯N = 153°] and these chains are linked into sheets by means of aromatic π–π stacking interactions. There is one intramolecular O—H⋯O hydrogen bond in (II), and a combination of one three‐centre N—H⋯(N,O) hydrogen bond [H⋯N = 2.46 Å, H⋯O = 2.31 Å, N⋯N = 3.190 (2) Å, N⋯O = 3.146 (2) Å, N—H⋯N = 138° and N—H⋯O = 154°] and one two‐centre C—H⋯O hydrogen bond [H⋯O = 2.46 Å, C⋯O = 3.405 (2) Å and C—H⋯O = 173°] links the molecules into sheets. In (III), an intramolecular O—H⋯N hydrogen bond and two N—H⋯O hydrogen bonds [H⋯O = 2.26 and 2.10 Å, N⋯O = 2.975 (2) and 2.954 (2) Å, and N—H⋯O = 138 and 163°] link the molecules into sheets. 相似文献
20.
Dorcas M. M. Farrell George Ferguson Alan J. Lough Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(8):955-957
In the title compound, C4H12N22+·2C8H7O3?·2CH4O, the cations lie across centres of inversion and are disordered over two orientations with equal occupancy; there are equal numbers of (R)‐ and (S)‐mandelate anions present (mandelate is α‐hydroxybenzeneacetate). The anions and the neutral water molecules are linked by O—H?O hydrogen bonds [O?O 2.658 (3) and 2.682 (3) Å, and O—H?O 176 and 166°] into deeply folded zigzag chains. Each orientation of the cation forms two symmetry‐related two‐centre N—H?O hydrogen bonds [N?O 2.588 (4) and 2.678 (4) Å, and N—H?O 177 and 171°] and two asymmetric, but planar, three‐centre N—H?(O)2 hydrogen bonds [N?O 2.686 (4)–3.137 (4) Å and N—H?O 137–147°], and by means of these the cations link the anion/water chains into bilayers. 相似文献