共查询到20条相似文献,搜索用时 15 毫秒
1.
Bartosz Zarychta Anna Piecyk‐Mizgaa Zdzisaw Daszkiewicz Jacek Zaleski 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(8):o515-o517
The structures of the two title isomeric compounds (systematic names: N‐methyl‐N,2‐dinitroaniline and N‐methyl‐N,3‐dinitroaniline, both C7H7N3O4) are slightly different because they exhibit different steric hindrances and hydrogen‐bonding environments. The aromatic rings are planar. The –N(Me)NO2 and –NO2 groups are not coplanar with the rings. Comparison of the geometric parameters of the ortho, meta and para isomers together with those of N‐methyl‐N‐phenylnitramine suggests that the position of the nitro group has a strong influence on the aromatic ring distortion. The crystal packing is stabilized by weak C—H⋯O hydrogen bonds to the nitramine group. 相似文献
2.
Xu‐Xia Sun Shu‐Lan Ma Hai‐Bo Huang Chuan‐Min Qi 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(2):o87-o88
In the crystal structure of the title compound, C21H21NO2, strong N—H⋯O and O—H⋯O hydrogen bonds exist. The keto–amine form is favoured over the enol–imine form in the tautomerism. Six‐membered chelate rings formed by intramolecular hydrogen bonds increase the stability of the whole molecule. Intermolecular hydrogen bonds link adjacent units together, forming an infinite one‐dimensional chain parallel to the a axis. 相似文献
3.
Mari Pretorius D. Bradley G. Williams Andreas Roodt Alfred Muller 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(6):o384-o386
The title compounds, Ph2PCH2N(H)Ph or C25H22NP and Ph2PCH2N(CH3)Ph or C26H24NP, respectively, are isomorphous, with calculated theoretical Tolman angles of 174 and 182°. 相似文献
4.
Sumod George Ashwini Nangia Vincent M. Lynch 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(6):777-778
In the crystal structure of the title compound, C13H12N2O, N—H(anti)?O hydrogen bonds produce the so‐called urea α‐network and the N—H(syn) donor forms an unconventional N—H?π hydrogen bond. 相似文献
5.
Nevzat Karaday ükriye akmak Mustafa Odabaolu Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(5):o303-o305
The title 4,4′‐disubstituted diphenyl‐1,3‐triazines, C14H15N3, (I), C12H9ClFN3, (II), and C13H12FN3, (III), each contain a triazene group (–N=N—NH–) having an extended conformation. The dihedral angles between the two benzene rings in (I), (II) and (III) are 4.3, 3.4 and 6.5°, respectively. The molecules are almost entirely planar, with maximum deviations from the mean planes of 0.1087 (2), −0.1072 (7) and 0.1401 (3) Å, respectively. In each compound, the molecules are linked by N—H⋯N hydrogen bonds to form chains and pack similarly in the crystal structures. 相似文献
6.
Jin‐Yan Zhao Xiang‐Bo Wang Guang‐You Zhang Wan‐Hui Wang 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(8):o534-o536
In the title compound, C25H30NO+·Cl−, the molecules are linked by a combination of intermolecular N—H⋯Cl and O—H⋯Cl hydrogen bonds and intramolecular N—H⋯O hydrogen bonds. The absolute configuration of the new stereogenic centre (the C atom adjacent to the N atom on the phenol side) is determined to have an R configuration. 相似文献
7.
Arzu
zek idem Albayrak Mustafa Odabaolu Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(3):o177-o180
The title compounds, (E)‐2‐[(2‐bromophenyl)iminomethyl]‐4‐methoxyphenol, C14H12BrNO2, (I), (E)‐2‐[(3‐bromophenyl)iminomethyl]‐4‐methoxyphenol, C14H12BrNO2, (II), and (E)‐2‐[(4‐bromophenyl)iminomethyl]‐4‐methoxyphenol, C14H12BrNO2, (III), adopt the phenol–imine tautomeric form. In all three structures, there are strong intramolecular O—H⋯N hydrogen bonds. Compound (I) has strong intermolecular hydrogen bonds, while compound (III) has weak intermolecular hydrogen bonds. In addition to these intermolecular interactions, C—H⋯π interactions in (I) and (III), and π–π interactions in (I), play roles in the crystal packing. The dihedral angles between the aromatic rings are 15.34 (12), 6.1 (3) and 39.2 (14)° for (I), (II) and (III), respectively. 相似文献
8.
Hasan Karabyk Bilgehan Güzel Muhittin Aygün Gülnaz Boa Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(4):o215-o218
The title Schiff base compound, C28H26N2O2, possesses both OH and NH tautomeric character in its molecular structure. While the OH side of the compound is described as an intermediate state, its NH side adopts a predominantly zwitterionic form. The molecular structure of the compound is stabilized by both N+—H⋯O− and O—H⋯N intramolecular hydrogen bonds. There are two weak C—H⋯O hydrogen bonds leading to polymeric chains of topology C(5) and C(13) running along the b axis of the unit cell. In addition, intermolecular C—H⋯π interactions serve to stabilize the extended structure. 相似文献
9.
Ivn Brito Danitza Vargas Andrea Reyes Alejandro Crdenas Matías Lpez‐Rodríguez 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(4):o234-o236
The title compound, C27H19NO2S, contains chains of fused (19) rings formed by intermolecular C—H·O=C hydrogen bonds and running along the [011] and [01] directions. These chains are linked through short intermolecular C—H·π contacts, giving rise to sheets. The conformation of the title compound is dominated primarily by the nearly orthogonal lone‐pair orbitals on the N and S atoms. 相似文献
10.
David Drouard Sandrine Py Marie‐Thrse Averbuch Christian Philouze Yannick Valle 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(9):1079-1080
The preparation and crystal structure of the title compound, C20H25NO2, are described. The N atom substituent of the nitrone function adopts a conformation which minimizes the 1,3‐allylic strain. 相似文献
11.
T. V. Sundar V. Parthasarathi K. Sarkunam M. Nallu B. Walfort H. Lang 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(7):o464-o466
The title compounds, C15H16ClN2O+·Br−·1.5H2O and C15H16BrN2O+·Br−·1.5H2O, are isomorphous. The benzene ring is oriented nearly normal to the pyridine ring in both compounds. The molecular packing is mainly influenced by intermolecular O—H⋯O and O—H⋯Br interactions, as well as weak intramolecular C—H⋯O interactions. The H2OBr− units form an extended water–bromide chain, with a bridging water molecule on a twofold axis. 相似文献
12.
Cem Cüneyt Ersanl igdem Albayrak Mustafa Odabaog
lu Canan Kazak Ahmet Erdnmez 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(6):o455-o457
The two title molecules, both C15H14N2O3, are roughly planar and display a trans conformation with respect to the –N=N– double bond, as found for other diazene derivatives. In both compounds, there are intramolecular O—H⋯O hydrogen bonds and the crystal packing is governed by weak intermolecular C—H⋯O hydrogen bonds and π–π stacking. 相似文献
13.
Taisuke Matsumoto Masataka Watanabe Tomohiro Matsumoto Shuntaro Mataka Thies Thiemann 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(11):o813-o814
In the title compound, C33H35NO2, the five‐membered ring adopts a half‐chair conformation. The N‐methyl‐N‐phenyl‐substituted keto–enamine moiety shows a comparatively long Csp2—N bond. 相似文献
14.
Hümeyra Bat Nezihe alkan Serkan Soylu Murat Ta 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(5):o343-o344
In the title compound, C14H11BrN2O2, which has the oxime group in an E conformation, molecules are linked by strong O—H⋯O and N—H⋯O hydrogen bonds into chains of edge‐fused rings, unlike closely related compounds. 相似文献
15.
Takashiro Akitsu Yasuaki Einaga 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(12):m640-m642
The title compounds, [Cu(C15H12Cl2NO)2], (I), and [Cu(C17H18NO2)2], (II), both adopt a compressed tetrahedral trans‐[CuN2O2] coordination geometry, the molecules having an umbrella conformation overall. These complexes differ from one another with respect to the 1‐phenylethylamine moieties, the direction of the benzene rings being either inside [in (I)] or inside and outside [in (II)] of the molecules. The crystals of (I) and (II) have Δ(R,R) and Λ(R,R) absolute configurations, respectively. 相似文献
16.
M. Scott Goodman Margaret A. Goodman Andrey Y. Kovalevsky Alexander Y. Nazarenko Donald Pope 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(2):m30-m32
The title copper(II) complex, [Cu(C22H18N6)2](ClO4)2·2C2H3N, comprises two neutral substituted tris(pyrazol‐1‐yl)methane ligands bonded to a central CuII ion, which is positioned on a crystallographic inversion center. Six Cu—N bonds are arranged in a distorted octahedral fashion. The unsubstituted pyrazole rings on each ligand are oriented trans with respect to each other, interdigitated with the two 3‐phenylpyrazole rings of the other ligand. 相似文献
17.
Hiroyuki Hosomi Shigeru Ohba Hiromu Aoyama 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):e154-e154
The crystal structure of the title thiobenzamide, C17H17NS, was determined to investigate the relationship between the photoreactivity in solid state and the structure. The geometry was confirmed to be the Z isomer. 相似文献
18.
Miroslav Zabadal Dominik Heger Marek Ne
as Petr Kln 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(2):o77-o79
The structures of the bichromophoric compounds N‐(1‐naphthylacetyl)glycine phenacyl ester, C22H19NO4, (I), and its oxygen analogue, phenacyl (1‐naphthylacetoxy)acetate, C22H18O5, (II), have been determined. The molecules of (I) are held together by intermolecular N—H⋯O hydrogen bonds between the carbonyl and N—H groups, while compound (II) does not show any hydrogen bonding in the crystal. 相似文献
19.
Hiroyuki Hosomi Shigeru Ohba Hiromu Aoyama 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):e152-e153
The crystal structures of the two title thiobenzamides, C19H21NS, (I), and C20H23NOS, (II), were determined to investigate the relationship between the photoreactivity in solid state and the structure. Their geometry was confirmed to be the E isomer in each case. 相似文献
20.
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