共查询到20条相似文献,搜索用时 78 毫秒
1.
Chenguang Li Paul D. Robinson Daniel J. Dyer 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(10):o596-o598
The two components of the title heterodimer, C17H21NO2·C8H5NO2, are linked end‐to‐end via O—H⋯O(=C) and C—H⋯O(=C) hydrogen‐bond interactions. Additional lateral C—H⋯O interactions link the dimers in a side‐by‐side fashion to produce wide infinite molecular ribbons. Adjacent ribbons are interconnected viaπ–π stacking and C—H⋯π(arene) interactions. This structure represents the first evidence of robust hydrogen‐bond formation between the moieties of pyridin‐4(1H)‐one and benzoic acid. 相似文献
2.
Simon J. Garden Marilza B. Corrêa Angelo C. Pinto James L. Wardell John N. Low Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(4):o234-o238
In ethyl N‐[2‐(hydroxyacetyl)phenyl]carbamate, C11H13NO4, all of the non‐H atoms lie on a mirror plane in the space group Pnma; the molecules are linked into simple chains by a single C—H⋯O hydrogen bond. The molecules of ethyl N‐[2‐(hydroxyacetyl)‐4‐iodophenyl]carbamate, C11H12INO4, are linked into sheets by a combination of O—H⋯I and C—H⋯O hydrogen bonds and a dipolar I⋯O contact. Ethyl N‐[2‐(hydroxyacetyl)‐4‐methylphenyl]carbamate, C12H15NO4, crystallizes with Z′ = 2 in the space group P; pairs of molecules are weakly linked by an O—H⋯O hydrogen bond and these aggregates are linked into chains by two independent aromatic π–π stacking interactions. 相似文献
3.
Na Liu Ai‐Ling Cheng En‐Qing Gao 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(2):o93-o95
In 3,4‐di‐2‐pyridyl‐1,2,5‐oxadiazole (dpo), C12H8N4O, each molecule resides on a twofold axis and interacts with eight neighbours via four C—H⋯N and four C—H⋯O interactions to generate a three‐dimensional hydrogen‐bonded architecture. In the perchlorate analogue, 2‐[3‐(2‐pyridyl)‐1,2,5‐oxadiazol‐4‐yl]pyridinium perchlorate, C12H9N4O+·ClO4− or [Hdpo]ClO4, the [Hdpo]+ cation is bisected by a crystallographic mirror plane, and the additional H atom in the cation is shared by the two pyridyl N atoms to form a symmetrical intramolecular N⋯H⋯N hydrogen bond. The cations and perchlorate anions are linked through C—H⋯O hydrogen bonds and π–π stacking interactions to form one‐dimensional tubes along the b‐axis direction. 相似文献
4.
Tomasz Klis Sergiusz Lulinski Janusz Serwatowski 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(3):o145-o146
The molecule of the title compound, 2,3‐F2‐4‐(CHO)C6H2B(OH)2 or C7H5BF2O3, contains a formyl group coplanar with the benzene ring. The boronic acid group is twisted with respect to the benzene ring plane. The molecules are organized into infinite chains via intermolecular O—H⋯O hydrogen bonds. These chains are additionally connected via strong O—H⋯O hydrogen bonds, producing a folded layer structure perpendicular to the a axis. These layers are paired due to B⋯F interactions. 相似文献
5.
Yao‐Cheng Shi Bei‐Bei Zhu Chun‐Xia Sui 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(12):m577-m580
Molecules of 1‐acetyl‐3‐ferrocenyl‐5‐methyl‐1H‐pyrazole, [Fe(C5H5)(C11H11N2O)], form a centrosymmetric dimer generated by a combination of one C—H⋯π(pyrazole) and one C—H⋯π(cyclopentadienyl) interaction. The dimers are linked by C—H⋯π interactions, involving the pyrazole rings as acceptors, into layers parallel to (10). Molecules of 1‐acetyl‐5‐ferrocenyl‐3‐(2‐pyridyl)‐1H‐pyrazole, [Fe(C5H5)(C15H12N3O)], are linked by C—H⋯O interactions into a chain running in the [010] direction. Two chains of this type passing through each unit cell are connected by O⋯π(pyridyl) interactions into an [010] double chain. 相似文献
6.
Bernard Marciniak 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(4):o252-o254
The asymmetric unit of the title compound, C10H8O2, contains two planar symmetry‐independent molecules linked by an O—H⋯O hydrogen bond. In the crystal structure, molecules are linked into infinite chains of rings, formed by a combination of O—H⋯O and C—H⋯O hydrogen bonds, and additionally reinforced by π–π stacking interactions. Adjacent chains are connected by weak C—H⋯π interactions. 相似文献
7.
Chenguang Li Paul D. Robinson Daniel J. Dyer 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(6):o336-o338
Cocrystallization of 1,1′‐(p‐phenylene)dipyridin‐4(1H)‐one (4,4′‐dpy) and terephthalic acid (tpa) affords the hydrogen‐bonded 1:1 title complex, C16H12N2O2·C8H6O4. Both molecules are symmetrically disposed about independent symmetry centers. Strong O—H⋯O hydrogen bonds between tpa carboxyl groups and 4,4′‐dpy carbonyl groups produce one‐dimensional zigzag infinite chains. Each chain is linked to four surrounding chains via weak C—H⋯O interactions, resulting in a three‐dimensional molecular framework. 相似文献
8.
Fang‐Jun Huo Cai‐Xia Yin Xiang‐Lin Jin Pin Yang 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(5):o332-o335
The two title chromene compounds, 3,3a‐dihydrocyclopenta[b]chromen‐1(2H)‐one, C16H12O2, (I), and 2‐(2‐hydroxybenzylidene)‐3,3a‐dihydrocyclopenta[b]chromen‐1(2H)‐one, C19H14O3, (II), have been determined in the monoclinic space group P21/n. Compound (I) is mainly stabilized by C—H⋯π interactions. Compound (II) is linked into infinite one‐dimensional chains with a C(3) motif via intermolecular O—H⋯O hydrogen bonds. The intermolecular C—H⋯π and π–π interactions also play key roles in stabilizing the crystal packing. Two intramolecular C—H⋯O hydrogen bonds with S(5) motifs were detected in (II). 相似文献
9.
Fang‐Jun Huo Cai‐Xia Yin Pin Yang 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(8):o500-o502
In the title compound, (5‐oxo‐3a,6a‐diphenylperhydroimidazo[4,5‐d]imidazol‐2‐ylidene)oxonium hydrogen sulfate, C16H15N4O2+·HSO4−, the asymmetric unit contains a hydrogen sulfate anion and a 3a,6a‐diphenylglycoluril oxonium cation. The hydrogen sulfate anion is joined to the oxonium cation via a strong O—H⋯O hydrogen bond (H⋯O = 1.69 Å). The crystal packing is mainly dominated by interactions involving the hydrogen sulfate anion. The diphenylglycoluril oxonium cations also self‐assemble through N—H⋯O hydrogen bonds, forming molecular chains along the [001] vector. Four intramolecular C—H⋯N hydrogen bonds are observed, having an S(5) motif. 相似文献
10.
Sunnie Myung Maren Pink Mu‐Hyun Baik David E. Clemmer 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(8):o506-o508
In the structure of dl ‐proline, C5H9NO2, the molecules are connected via classical intermolecular N—H⋯O hydrogen bonds involving the amine and carboxyl groups [N⋯O = 2.7129 (15) and 2.8392 (16) Å], and form chains along the b‐axis direction and parallel to (01). The chains are linked into sheets via weak non‐classical hydrogen bonds. The conformation of the molecule and its packing are notably different from the monohydrated dl ‐proline form. 相似文献
11.
Eric Block Alexander S. Filatov Marina A. Petrukhina 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(10):o596-o598
The title molecule, C2H6OSe, has a trigonal–pyramidal structure analogous to that of its sulfur analog, dimethyl sulfoxide (DMSO). The Se—O distance in dimethyl selenoxide (DMSeO) is 1.6756 (16) Å [versus S—O of 1.531 (5) Å in DMSO], consistent with a highly polar σ bond. In the solid state, the molecules of DMSeO are linked into centrosymmetric dimers formed by two C—H⋯O hydrogen bonds. These dimers further aggregate into a ladder‐like supramolecular network via two additional intermolecular C—H⋯O interactions. As a result, each O atom of DMSeO acts as an acceptor of three hydrogen bonds. 相似文献
12.
Zun‐Ting Zhang Yan‐Chang Wang 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(1):o51-o53
In the lattice of the title compound (systematic name: 5,6,7‐trihydroxy‐4′‐methoxyisoflavone monohydrate), C16H12O6·H2O, the isoflavone molecules are linked into chains through R43(17) motifs composed via O—H⋯O and C—H⋯O hydrogen bonds. Centrosymmetric R42(14) motifs assemble the chains into sheets. Hydrogen‐bonding and aromatic π–π stacking interactions lead to the formation of a three‐dimensional network structure. 相似文献
13.
Veysel T. Yilmaz Canan Kazak Cumhur Kirilmis Murat Koca Frank W. Heinemann 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(7):o438-o441
The molecules of 2‐benzoyl‐1‐benzofuran, C15H10O2, (I), interact through double C—H⋯O hydrogen bonds, forming dimers that are further linked by C—H⋯O, C—H⋯π and π–π interactions, resulting in a three‐dimensional supramolecular network. The dihedral angle between the benzoyl and benzofuran fragments in (I) is 46.15 (3)°. The molecules of bis(5‐bromo‐1‐benzofuran‐2‐yl) ketone, C17H8Br2O3, (II), exhibit C2 symmetry, with the carbonyl group (C=O) lying along the twofold rotation axis, and are linked by a combination of C—H⋯O and C—H⋯π interactions and Br⋯Br contacts to form sheets. The stability of the molecular packing in 3‐mesityl‐3‐methylcyclobutyl 3‐methylnaphtho[1,2‐b]furan‐2‐yl ketone, C28H28O2, (III), arises from C—H⋯π and π–π stacking interactions. The fused naphthofuran moiety in (III) is essentially planar and makes a dihedral angle of 81.61 (3)° with the mean plane of the trimethylbenzene ring. 相似文献
14.
Muharrem Diner Namk
zdemir Sinan Saydam
zer Bekarolu Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(2):o89-o91
The molecule of the title compound, C18H24N2O2, resides on a crystallographic inversion centre. The molecule adopts a transoid conformation with respect to the central C—C single bond and is in the meso form. A polarimetric study of the compound did not show any optical activity, indicating that the compound is a racemic mixture entirely consistent with the centrosymmetric space group. In the molecule, there is one intramolecular N—H⋯O interaction, resulting in the formation of a five‐membered ring. In the crystal structure, intermolecular O—H⋯N and C—H⋯O interactions are also observed. These interactions form an R22(9) ring and one‐dimensional linear chains of edge‐fused rings running parallel to the [010] direction, which stabilize the crystal packing. 相似文献
15.
Peter G. Jones Aleksander Zemanek Piotr Ku 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(1):o73-o76
In 2′,5′‐dimethyl‐p‐terphenyl, C20H18, which displays pseudosymmetry (the true space group is Pna21, but less satisfactory refinement can also be achieved in Pbcn), the molecules are linked into chains by two short C—H⋯π interactions to the centroid of the central ring. In 2′,5′‐bis(bromomethyl)‐p‐terphenyl, C20H16Br2, the polar CH2Br groups cause molecules to aggregate via C—H⋯Br and Br⋯Br interactions, forming a layer structure, in which the phenyl rings project outwards from the central, more polar, region. 相似文献
16.
Ben‐Yong Lou Xiao‐Dong Huang Xiang‐Chao Lin 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(6):o310-o311
4,4′‐Bipyridine cocrystallizes with 3‐hydroxy‐2‐naphthoic acid in a 1:2 ratio to give a centrosymmetric three‐component supramolecular adduct, namely 3‐hydroxy‐2‐naphthoic acid–4,4′‐bipyridine (2/1), C11H8O3·0.5C10H8N2, in which 4,4′‐bipyridine is located on an inversion center. The pyridine–carboxylic acid heterosynthon generates an infinite one‐dimensional hydrogen‐bonded chain viaπ–π interactions between naphthyl and 4,4′‐bipyridine groups. The one‐dimensional chains are further assembled into a three‐dimensional network by weak C—H⋯π interactions between pyridyl and naphthyl rings, and C—H⋯O interactions between 3‐hydroxy‐2‐naphthoic acid molecules. 相似文献
17.
Janusz Zachara Izabela D. Madura Andrzej Zimniak Irena Oszczapowicz Iwona Chrobak 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(11):o625-o627
The structural analysis of deacetylcephalothin [systematic name: (6R,7R)‐3‐hydroxymethyl‐8‐oxo‐7‐(2‐thiophen‐2‐ylacetylamino)‐5‐thia‐1‐azabicyclo[4.2.0]oct‐2‐ene‐2‐carboxylic acid], C14H14N2O5S2, shows that the geometry of the central bicyclic moiety is close to the geometry exhibited by other biologically active cephalosporin antibiotics. The molecules are arranged in a helical chain running parallel to the 21 axis via a strong O—H⋯O hydrogen bond. The main helices are zipped together via N—H⋯O interactions, forming infinite layers. The supramolecular architecture is stabilized by O—H⋯S and C—H⋯O hydrogen bonds. 相似文献
18.
brahim Uar Ahmet Bulut Canan Kazak 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(9):m428-m431
The asymmetric unit of the title compound, {[Pb(C4O4)(C12H8N2)2(H2O)]·2H2O}n, contains one squarate dianion, two phenanthroline (phen) ligands and one aqua ligand all coordinated to Pb, and two solvent water molecules. The eight‐coordinate Pb metal ion displays a distorted bicapped trigonal–prismatic coordination environment, defined by three squarate O atoms, four N atoms from two chelating phen ligands and one O atom from the coordinated water molecule. The crystal structure contains chains of squarate‐1,2,3‐bridged PbII ions running in the [010] direction. These polymeric chains are linked to one another via offset face‐to‐face π–π interactions between the phen ligands, which lead to a two‐dimensional network extending along the (001) plane. The crystal structure is also stabilized by O—H⋯O intermolecular hydrogen‐bond interactions, forming a three‐dimensional network. 相似文献
19.
G. Y. S. K. Swamy K. Ravikumar B. Sridhar I. Mahender K. V. N. S. Srinivas 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(8):o495-o497
The title compound [systematic name: 5‐hydroxy‐2‐(3‐hydroxy‐4,5‐dimethoxyphenyl)‐3,6,7‐trimethoxy‐4H‐chromen‐4‐one], C20H20O9, was isolated from the seeds of Cleom viscosa Linn. Two independent molecules (A and B) are present in the asymmetric unit with almost similar conformations. The dihedral angles between the fused chromene ring system and the benzene ring bonded to it in molecules A and B are 4.2 (1) and 12.7 (1)°, respectively. The hydroxy O atoms are involved in intramolecular hydrogen bonding. The molecules are linked by C—H⋯O and O—H⋯O interactions into chains of edge‐fused R33(22) rings. Aromatic π–π and weak C—H⋯π(arene) interactions are also observed. 相似文献
20.
Nada Kouti Hulita Aleksandar Danilovski Darko Fili Marina Marinkovi Ernest Metrovi Miljenko Dumi 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(11):o648-o651
The structures of the three title isomers, namely 4‐(2‐methylanilino)pyridine‐3‐sulfonamide, (I), 4‐(3‐methylanilino)pyridine‐3‐sulfonamide, (II), and 4‐(4‐methylanilino)pyridine‐3‐sulfonamide, (III), all C12H13N3O2S, differ in their hydrogen‐bonding arrangements. In all three molecules, the conformation of the 4‐aminopyridine‐3‐sulfonamide moiety is conserved by an intramolecular N—H⋯O hydrogen bond and a C—H⋯O interaction. In the supramolecular structures of all three isomers, similar C(6) chains are formed via intermolecular N—H⋯N hydrogen bonds. N—H⋯O hydrogen bonds lead to C(4) chains in (I), and to R22(8) centrosymmetric dimers in (II) and (III). In each isomer, the overall effect of all hydrogen bonds is to form layer structures. 相似文献