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1.
Jaromír Marek Pavel Kopel Zdenk Trvní
ek 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(10):m399-m401
The title compound, [Na(C12H8N2)3](C3H2N3S3), contains an Na+ centre which is ionicly bonded to three 1,10‐phenanthroline (phen) ligands and one trithiocyanurate(1−) (ttcH2) anion. In the crystal structure, the anions are linked via hydrogen bonds to form linear chains. The S and H atoms of the ttcH2 anion participate in intermolecular N—H⋯S hydrogen bonding, with N⋯S distances of 3.298 (2) and 3.336 (2) Å. The phen ligands are almost parallel, with dihedral angles of 3.92 (5), 11.75 (5) and 15.45 (5)°; moreover, they are nearly perpendicular to the ttcH2 chains, with angles of 81.94 (7), 85.86 (7) and 85.96 (7)°. 相似文献
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Tripodal 1,3,5‐tris(phenoxymethyl)‐2,4,6‐triethylbenzene analogues have been synthesized and structurally characterized by IR, 1H NMR and 13C NMR spectroscopy and HRMS, and additionally, the single crystal structures of compounds bearing ortho‐ ( 7 ), meta‐ ( 9 ) and para‐hydroxymethyl ( 11 ) functions have been determined by X‐ray diffraction analysis. The structural study revealed that compounds 7 , 9 , and 11 do not adopt the expected 1,3,5‐alternate conformation in the solid state. The packing diagrams of compounds 7 , 9 , and 11 revealed that six hydrophilic hydroxymethyl groups from six individual molecules ( 7 , 9 and 11 ) were arranged in close contact via intermolecular hydrogen‐bond interactions. For compounds 7 and 9 , the six hydroxyl groups formed a distorted hexagonal ring; however, formation of such a hexagonal ring was not clear in the case of compound 11 . Compounds 9 and 11 were found to form hydrophobic cavities via intermolecular hydrogen‐bond interactions in the solid state, and the cavities were occupied by two ethyl groups from the two cavity‐forming molecules. 相似文献
3.
Syntheses,Crystal Structures,and Luminescence Properties of Four Coordination Polymers Based on 1,3,5‐Tris (imidazol‐1‐yl)benzene 下载免费PDF全文
Based on the tripodal 1,3,5‐tris(imidazol‐1‐yl)benzene (tib) ligand, four transition metal coordination polymers, namely, {[Ni3(tib)2(H2O)12] · (SO4)3}n ( 1 ), {[Co1/6(tib)1/3] · (O)1/3}n ( 2 ), and [M(tib)(hip)]n (M = Mn for 3 , and M = Co for 4 ) (hip = 5‐hydroxyisophthalic acid), were synthesized through solvothermal method. Their structures were defined by single‐crystal X‐ray diffraction analyses and further characterized by elemental analyses (EA), IR spectra, powder X‐ray diffraction (PXRD), and thermogravimetric analyses (TGA). Complex 1 displays a 2D 3‐connected (63) hcb net. Complex 2 is a 2D (3,6)‐connected (43)2(46.66.83) kgm net. Complex 3 and 4 present similar 2D 4‐connected (44.62) sql net. Moreover, the solid state luminescence properties of complexes 1 and 3 were investigated. 相似文献
4.
Henning Osholm Srensen Magnus Magnussen Nicolai Stuhr‐Hansen 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(8):o503-o505
The first crystal structure of a three‐terminal sulfur end‐capped oligophenylenevinylene, C36H30O3S3·0.5C7H8, has been determined at 122 (1) K. The molecular threefold symmetry is not utilized in the crystal structure. It is confirmed that the double bonds have been fully transformed into a trans configuration by iodine treatment. 相似文献
5.
Ram K. R. Jetti Ashwini Nangia 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):e259-e259
The crystal structure of the title compound, C28H26, in the monoclinic space group C2/c has a columnar packing arrangement with a 7.20 Å axis, a feature common to several tetraphenylmethanes. 相似文献
6.
Jeffrey C. Bryan Michael N. Burnett Richard A. Sachleben 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):e167-e167
The title compound, C9H9Cl3, is being used as a platform for new tripodal receptors. Two molecules make up the asymmetric unit; weak intermolecular hydrogen bonding is observed between methylene H atoms and the chlorine of an adjacent molecule. There are also C—H?π interactions. 相似文献
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The 3,5‐bis(5‐carboxy‐6‐azauracil‐1‐yl)aniline ( 7 ) and 1,3,5‐tris(5‐carboxy‐6‐azauracil‐1‐yl)benzene ( 10 ) were prepared from 3‐amino‐5‐nitroacetanilide ( 1 ) via intermediates 2–6 . A series of other substituted 6‐azauracil derivatives 9, 11‐14 were also prepared. 相似文献
9.
Macroscopic Chirality of Supramolecular Gels Formed from Achiral Tris(ethyl cinnamate) Benzene‐1,3,5‐tricarboxamides 下载免费PDF全文
Zhaocun Shen Dr. Tianyu Wang Prof. Dr. Minghua Liu 《Angewandte Chemie (International ed. in English)》2014,53(49):13424-13428
A C3‐symmetric benzene‐1,3,5‐tricarboxamide substituted with ethyl cinnamate was found to self‐assemble into supramolecular gels with macroscopic chirality in a DMF/H2O mixture. The achiral compound simultaneously formed left‐ and right‐handed twists in an unequal number, thus resulting in the macroscopic chirality of the gels without any chiral additives. Furthermore, ester–amide exchange reactions with chiral amines enabled the control of both the handedness of the twists and the macroscopic chirality of the gels, depending on the structures of the chiral amines. These results provide new prospects for understanding and regulating symmetry breaking in assemblies of supramolecular gels formed from achiral molecular building blocks. 相似文献
10.
The trisilanol 1,3,5‐(HOi‐Bu2Si)3C6H3 ( 7 ), prepared in three steps from 1,3,5‐tribromobenzene via the intermediates 1,3,5‐(Hi‐Bu2Si)3C6H3 ( 8 ) and 1,3,5‐(Cli‐Bu2Si)3C6H3 ( 9 ) forms an equimolar complex with trans‐bis(4‐pyridyl)ethylene (bpe), 7 ·bpe, whose structure was investigated by X‐ray crystallography. The hydrogen‐bonded network features a number of SiO? H(H)Si and SiO? H hydrogen bridges. Evidence was found for cooperative strengthening within the sequential hydrogen bonds. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
11.
Praveen K. Thallapally Gautam R. Desiraju 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(5):572-573
The title compound, 1,3,5‐tris(2‐cyanoethyl)‐1,3,5‐triazine‐2,4,6(1H,3H,5H)‐trione, C12H12N6O3, forms a layered structure stabilized by C—H?O and C—H?N hydrogen bonds. 相似文献
12.
Paul E. Kruger Philip R. Mackie Mark Nieuwenhuyzen 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(11):e532-e532
The title compound, C6HCl3N2O4, is an intermediate in the synthesis of 1,3,5‐trichloro‐2,4,6‐trinitrobenzene. The crystal structure at 153 K shows no major deviations from the previously reported structure at 295 K other than the expected contraction of the a and c axes and, correspondingly, the β angle. 相似文献
13.
Mingchang Zhu Hongwei Zhao Tingting Peng Junqi Su Bo Meng Zhenzhen Qi Bing Jia Yunhui Feng Enjun Gao 《应用有机金属化学》2019,33(3)
Three novel complexes, [Zn (tib)2·(H2O)2]·(NO3)2 ( 1 ), [Co (tib)2]·2NO3 ( 2 ) and [Co2(tib)2(btc)]·H2O ( 3 ) [H4btc = 1,2,4,5‐benzenetetracarboxylic acid; H2tib = 1,3,5‐tris(1‐imidazolyl)benzene], were synthesized and characterized by single‐crystal X‐ray, IR and elemental analysis. The interaction of these complexes with FS‐DNA (fish sperm DNA) was monitored, and binding constants were determined using UV/Vis, which revealed that they have the ability to bind to FS‐DNA. DNA‐binding constants (K) for the three complexes were 2.2 × 104 m ?1, 0.7 × 104 m ?1 and 0.09 × 104 m ?1, respectively. The interaction capacity of the complexes with FS‐DNA has been investigated by fluorescence spectroscopy. Stern–Volmer quenching plot values for complexes 1 , 2 and 3 were 0.3784, 0.1028 and 0.076, respectively. The viscosity measurement suggested that complexes 1 , 2 and 3 interact with DNA in an intercalation mode. In addition, anti‐cancer activities of these complexes investigated through MTT assays in vitro indicated that the complexes showed good cytotoxic activity against cancer cell lines. Cytotoxic activity of test complexes against two different cancer cell lines (HeLa and KB cells) showed significant cancer cell inhibition rates. Flow cytometry experiments and morphological apoptosis studies showed that the complexes induced apoptosis of HeLa tumor cell lines. Finally, a further molecular docking technique was employed to confirm the binding of the complexes toward the molecular target DNA. 相似文献
14.
Unprecedented Trinuclear AgI Complex with 2,4,6‐Tris(2‐pyrimidyl)‐1,3,5‐triazine as an Efficient Catalyst for the Aziridination of Olefins 下载免费PDF全文
Dr. Damir A. Safin Dr. Amélie Pialat Dr. Ilia Korobkov Prof. Muralee Murugesu 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(16):6144-6149
An unprecedented trinuclear heteroleptic AgI complex was isolated using a stable multidentate 2,4,6‐tris(2‐pyrimidyl)‐1,3,5‐triazine (TPymT) ligand. The obtained compound is an efficient catalyst for the direct aziridination of terminal olefins. 相似文献
15.
Jacquelyn M. Burke Judith A. K. Howard Todd B. Marder Claire Wilson 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(11):1354-1355
The title compound, C21H22P+·BCl4?, is the first structurally characterized example of the [HP(o‐tolyl)3]+ cation, presented here with BCl4? as the counter‐ion. The cation has a near‐tetrahedral P atom and the BCl4? anion is near‐tetrahedral at boron. There are no unusually short cation–anion contacts. 相似文献
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17.
Dmitrii S. Yufit Judith A. K. Howard Sergei I. Kozhushkov Rafael R. Kostikov Armin de Meijere 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(8):968-969
The central three‐membered ring in the title compound, trans‐1,1′,1′′‐cyclopropane‐1,2,3‐triyltris(cyclopropanol), C12H18O3, shows pronounced asymmetry of the bond lengths, which is induced by the different orientations of the substituents. A network of hydrogen bonds links the molecules into sheets. 相似文献
18.
Werner Lwe Stefanie A. Brtter Manuela Weber Peter Luger Joachim Buddrus 《Journal of heterocyclic chemistry》2001,38(2):365-370
Under basic conditions 2,6‐bis(bromomethyl)‐4‐pyrone 8 reacts with tetraethylene glycol to yield the unexpected macrocycle 9 , which is related to the antibiotic Kjellmanianone 10 . We propose that this ring transformation proceeds via the cyclopropyl intermediate d (Scheme 2), which undergoes a ring opening reaction comparable to the Favorskii rearrangement. Also, 8 reacts with methanol/sodium methoxide to yield the 3(2H)‐furanone derivative 11 , the formation of which is suggested to proceed via the intermediate k with a carbenium‐oxonium‐ion subunit (Scheme 3). The structure of the 3(2H)‐furanone derivative was confirmed by X‐ray analysis. 相似文献
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Marcel Wieland Kuan‐Jen Su Gerald Wagner Udo H. Brinker Vladimir B. Arion 《Acta Crystallographica. Section C, Structural Chemistry》2009,65(5):o240-o242
The molecule of the title compound, C10H6N24, lies on a crystallographic inversion centre located in the middle of the benzene ring. Steric overcrowding by the bulky N3 groups is avoided by the tendency of four azide entities to be arranged parallel to the benzene ring and the other four azide groups to be arranged alternately above and below the benzene plane in a skeletal Ci symmetry. The compound is of interest for high‐energy research and as a precursor for the synthesis of carbon nanotubes, nanospheres or high‐nitrogen carbon nitrides with great potential for biological and technological applications. 相似文献