共查询到20条相似文献,搜索用时 15 毫秒
1.
Hctor Novoa de Armas Hiram Prez Oswald M. Peeters Norbert M. Blaton Camiel J. De Ranter Jos Manuel Lpez 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(3):e98-e99
The title compound, (C6H5CH2)3PO, is an organic tertiary phosphine oxide. The molecule has threefold symmetry, with the P—O bond along the threefold axis. Main dimensions include P—O 1.488 (4), P—C 1.823 (3) Å and O—P—C 114.7 (1)°. The crystals were accidentally obtained when preparing complexes of nickel(II) with dibenzylphosphine. 相似文献
2.
Kazumasa Honda Hiroshi Yamawaki Makoto Matsukawa Midori Goto Takehiro Matsunaga Katsutoshi Aoki Masatake Yoshida Shuzo Fujiwara 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(8):m319-m321
In the crystal structure of the title compound, [Fe(H2O)6](C6H2N3O7)2·2H2O, the centrosymmetric cationic iron complexes and picrate anions form separate stacks extending along the b axis. No picrate species ligate to the metal cation. Picrate ions are linked to one another in the stack via short intermolecular C⃛C contacts of 3.083 (4) and 3.055 (4) Å. Variable‐temperature X‐ray diffraction measurements performed between room temperature and 93 K showed a linear decrease of the lattice parameters, suggesting that there is no phase transition. 相似文献
3.
Anwar Usman Suchada Chantrapromma Hoong‐Kun Fun Bo‐Long Poh Chatchanok Karalai 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):o46-o47
In the title complex, the 1:1 ionic adduct of hexamethylenetetraminium and 2,4,6‐trinitrophenolate, C6H13N4+·C6H2N3O7?, the cation acts as a donor for bifurcated hydrogen bonds to the O atoms of the phenolate and one of the nitro groups of the 2,4,6‐trinitrophenolate anion. The crystal structure is built from sheets of cations and anions, and is stabilized by intermolecular C—H?O and C—H?π interactions. 相似文献
4.
Natalia V. Kuratieva Marina I. Naumova Dmitry Yu. Naumov Nina V. Podberezskaya 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(1):i1-i3
The structure of hexaaquanickel(II) bis(hypophosphite), [Ni(H2O)6](H2PO2)2, has been determined. The crystals are prismatic. The packing of the Ni and P atoms (not the entire hypophosphite anions) is the same as in the structures of [Co(H2O)6](H2PO2)2 and [Co0.5Ni0.5(H2O)6](H2PO2)2. The NiII cations have a pseudo‐face‐centered cubic cell, with cell parameter a 10.216 Å and tetrahedral cavities occupied by P atoms. The NiII cation has crystallographically imposed twofold symmetry and has an octahedral coordination sphere consisting of six water O atoms, two of which also lie on the twofold axis. The planes of oppositely coordinated water molecules are in a cross conformation. The geometry of the hypophosphite anion is close to point symmetry mm2. The hypophosphite anions are hydrogen bonded to the coordinated water molecules. 相似文献
5.
Melanie Rademeyer 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(2):m55-m56
The crystal structure of bis(benzylammonium) hexachlorotin(IV), (C7H7NH3)2[SnCl6], exhibits ionic layers separated by hydrocarbon layers. The hydrocarbon layer contains two crystallographically inequivalent benzyl groups and aromatic π–π stacking interactions are observed in this layer. In the inorganic layer, the ammonium groups interact with isolated tilted [SnCl6]2− octahedra through normal, bifurcated and trifurcated N—H⋯Cl hydrogen bonds. 相似文献
6.
Santiago Cabaleiro‐Martínez Jesús Castro Jaime Romero Jos A. García‐Vzquez Antonio Sousa 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):e249-e250
The title compound, [Co(H2O)6](CH3C6H4SO3)2, has a structure where the metal atom is surrounded by six molecules of water forming the cation and the anion is deprotonated 4‐toluenesulfonic acid. The Co atom is in a nearly regular octahedral coordination geometry, with Co—O distances between 2.0529 (14) and 2.0810 (16) Å, and angles ranging from 87.25 (9) to 92.75 (9)°. The supramolecular structure consists of parallel layers of cations and anions. The anions are arranged with their sulfonate groups directed towards the cation layer in an alternating fashion and form hydrogen bonds with the water molecules of the cation. 相似文献
7.
Olof Kristiansson Patric Lindqvist‐Reis 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(2):163-164
The title compound, [Y(C2H6OS)2(H2O)6]Cl3, contains the cation [Y(H2O)6{(CH3)2SO}2]3+ with a distorted square antiprismatic geometry of the eight coordinated O atoms. The six water molecules are coordinated with an average Y—O distance of 2.38 (2) Å, ranging from 2.360 (3) to 2.404 (3) Å. Each water molecule forms two hydrogen bonds to the chloride anions with O—Cl distances ranging from 3.068 (4) to 3.422 (4) Å. The two dimethyl sulfoxide ligands, situated in the cis position with the O—Y—O angle equal to 83.22 (11)°, have Y—O distances of 2.269 (3) and 2.278 (3) Å. 相似文献
8.
Muharrem Diner Namk
zdemir Emin Sarpnar Lalehan Kulak Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(12):o722-o724
In the asymmetric unit of the title compound, C10H15N4O2+·H2PO4−, there are two protonated aminoguanidinium cations and two dihydrogenphosphate anions. The positive charge on the protonated amidine group is delocalized over the three C—N bonds in a manner similar to that found in guanidinium salts. The aminoguanidinium cations are found to be the E‐isomer structures. Intramolecular interactions of the N—H⋯N type are observed, leading to the formation of five‐membered rings. Extensive networks of O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds stabilize the three‐dimensional network. In the crystal structure, π–π interactions between the benzene rings, with a distance of 3.778 (2) Å between the ring centroids, also affect the packing of the molecules. 相似文献
9.
Larry R. Falvello Daniel Ferrer Tatiana Soler Milagros Toms 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(4):m149-m151
In hexaaquanickel bis(2,6‐dioxo‐1,2,3,6‐tetrahydropyrimidine‐4‐carboxylate) dihydrate, [Ni(H2O)6](C5H3N2O4)2·2H2O, the nickel cation is coordinated by six aqua ligands and only associated with the two orotate ions through hydrogen bonds. The structure is isotypic with the magnesium and zinc analogues. The metal cation sits on a crystallographic center of inversion that relates the water molecules and the organic anions. The orotate moieties form an unbonded one‐dimensional chain mediated by a hydrogen‐bonded self‐recognition interaction. The hexaaquanickel complex molecules bridge these chains laterally, acting as molecular clamps that bring neighboring layers nearer than expected. As a result of this three‐dimensional arrangement, a short contact of 3.166 (5) Å is observed between two C atoms of two adjacent ribbons. 相似文献
10.
Veysel T. Yilmaz Canan Kazak Erbil Aar Bahittin Kahveci Kutalmis Guven 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(2):o101-o104
The title compounds, 4‐benzylamino‐3‐(4‐methylbenzyl)‐1H‐1,2,4‐triazol‐5(4H)‐one, C17H18N4O, (I), 3‐(4‐methylbenzyl)‐4‐(4‐methylbenzylamino)‐1H‐1,2,4‐triazol‐5(4H)‐one, C18H20N4O, (II), and 3‐(4‐chlorobenzyl)‐4‐(4‐methylbenzylamino)‐1H‐1,2,4‐triazol‐5(4H)‐one, C17H17ClN4O, (III), were obtained from the corresponding Schiff base in the presence of diglyme and NaBH4. Each compound contains a 1,2,4‐triazole ring and two benzene rings, which are essentially planar. The molecules are linked by a combination of intermolecular N—H⋯O and N—H⋯N hydrogen bonds. Additionally, there is a weak π–π stacking interaction in (I), involving the benzene ring of the aminobenzyl group and the partially aromatic 1,2,4‐triazole moiety, with a centroid–centroid distance of 3.7397 (10) Å. 相似文献
11.
Marija Vojnovi Berislav Peri Pavica Planini Gerald Giester Nevenka Brni
evi 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(6):i71-i73
The title compound, [Ta6Br12(H2O)6](Br0.4Cl1.6)·8H2O, crystallizes in space group P. The structure contains two crystallographically independent [Ta6Br12(H2O)6]2+ cluster cations forming distinct layers parallel to the ab plane. The compound is isoconfigurational with the double salts [Ta6Br12(H2O)6]X2·trans‐[Ta6Br12(OH)4(H2O)2]·18H2O (X = Cl, Br). 相似文献
12.
De‐Chun Zhang 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(6):o351-o352
In the title compound, N‐(2‐methoxyphenyl)‐4‐nitrobenzylideneamine, C14H12N2O3, the two phenyl rings make a dihedral angle of 48.0 (2)° and the nitro group is at an angle of 6.5 (1)° with respect to its attached phenyl ring. In the crystal structure, molecules are related as centrosymmetric pairs through π–π interactions and are further connected through strong C—H?O hydrogen bonds [C?O 3.4259 (17) Å and C—H?O 167°], forming molecular stacks along [100]. These stacks associate further through longer C—H?O interactions, forming two‐dimensional networks. In the c direction, there are only weak van der Waals interactions. The relationship between the molecular planarity and its centrosymmetry is also briefly described. 相似文献
13.
Xiao‐Ming Ren Yan Xu Chuan‐Jiang Hu Qing‐Jin Meng Chang‐Sheng Lu Hua‐Ting Wang 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):1499-1500
The maleonitrile moiety of the title compound, (2Z)‐2,3‐bis[(4‐nitrobenzyl)sulfanyl]but‐2‐enedinitrile, C18H12N4O4S2, is almost planar. The two benzene rings are nearly parallel to each other and perpendicular to the maleonitrile plane. Intermolecular S?S and π–π interactions are observed in the crystal structure. 相似文献
14.
L. Vijayalakshmi V. Parthasarathi P. Manishanker 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(9):e403-e404
The crystal structure of the title compound, C13H10ClNO, confirms that it exists as a nitrone. The geometry about C=N is Z. The relevant torsion angles indicate trans and cis conformations around the nitrone bond. 相似文献
15.
Suchada Chantrapromma Anwar Usman Hoong‐Kun Fun Bo‐Long Poh Chatchanok Karalai 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(11):o675-o677
In the title adduct, 1,3,5,7‐tetraazatricyclo[3.3.1.13,7]decane–4‐nitrobenzene‐1,2‐diol–water (1/2/1), C6H12N4·2C6H5NO4·H2O, the hexamethylenetetramine molecule acts as an acceptor of intermolecular O—H?N hydrogen‐bonding interactions from the water molecule and the hydroxy groups of one of the two symmetry‐independent 4‐nitrocatechol molecules. The structure is built from molecular layers which are stabilized by three intermolecular O—H?O, two intermolecular O—H?N and four intermolecular C—H?O hydrogen bonds. The layers are further interconnected by one additional intermolecular O—H?N and two intermolecular C—H?O hydrogen bonds. 相似文献
16.
Two alkylimido derivatives of hexamolybdate, (Bu4N)2[Mo6O18(≡N‐o‐COOCH3C6H4)] ( 1 ) and (Bu4N)2[Mo6O18(≡N‐o‐COOCH2CH3C6H4)] ( 2 ), were synthesized in high purity and good yields by the reaction of [(C4H9)4N]4[α‐Mo8O26] and methyl anthranilate or ethyl‐o‐aminobenzoate hydrochloride with N,N′‐dicyclohexylcarbodiimide (DCC) as a dehydrating agent in dry acetonitrile solution, which were characterized by elemental analyses, IR, UV/Vis, and 1H NMR spectroscopy as well as ESI‐MS, and single‐crystal X‐ray diffraction study. Compound 1 crystallizes in the monoclinic space group P21/n with one‐dimensional chain structure via intramolecular hydrogen bond. Compound 2 also crystallizes in the monoclinic space group P21/n with dimer structure by intramolecular hydrogen bonds and π–π interactions between the pairs of cluster anions. 相似文献
17.
Tuncay TuncÛ Habibe Tezcan Musa Sar Orhan Büyükgüngr Rahmi Ya?basan 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(9):o528-o529
Molecules of the title compound (alternative name: p‐nitrobenzaldehyde phenylhydrazone), C13H11N3O2, adopt an E configuration about the azomethine C=N double bond. Molecules are approximately planar and the dihedral angle between the planes of the phenyl rings is 11.62 (9)°. Hydrogen bonding links molecules related by 42 screw axes to form helices with a pitch of 7.7186 (8) Å. 相似文献
18.
Daniel E. Lynch Ian McClenaghan 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(1):o1-o5
The crystal structures of four trifluoromethylnitrobenzene analogues (CF3)C6H3(NO2)[C4H8N2]R (where C4H8N2 is piperazinyl and R is ethyl carboxylate, CO2C2H5, or phenyl, C6H5), have been determined, and their conformations and packing arrangements are compared. The four compounds are ethyl 4‐[4‐nitro‐2‐(trifluoromethyl)phenyl]piperazine‐1‐carboxylate, (I), and ethyl 4‐[2‐nitro‐4‐(trifluoromethyl)phenyl]piperazine‐1‐carboxylate, (II), both C14H16F3N3O4, and 1‐[4‐nitro‐2‐(trifluoromethyl)phenyl]‐4‐phenylpiperazine, (III), and 1‐[2‐nitro‐4‐(trifluoromethyl)phenyl]‐4‐phenylpiperazine, (IV), both C17H16F3N3O2. All molecules adopt a rod‐like conformation, while the asymmetric units of (II) and (IV) contain two unique molecules that pack as monodirectional pairs. All molecules pack with C—H⋯O/F close contacts to all but one of the O atoms and to five of the 18 F atoms. 相似文献
19.
Zdenk Trvní
ek Igor Popa Karel Doleal 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(9):o662-o664
The title compound, C13H14N5O+·Cl−, belongs to the group of aromatic cytokinins. These compounds affect a variety of important physiological processes in plants and animals as well as in bacteria, including cell division, differentiation and senescence. The structure consists of a 6‐(4‐methoxybenzylamino)purinium cation and a Cl− anion. The cation moiety exists as the N3‐protonated N7 tautomer. The cation contains nearly planar benzene and purine ring systems, with a dihedral angle of 77.46 (5)°. The crystal structure is stabilized by Namino—H⋯Npurine hydrogen bonds connecting two adjacent molecules, thus forming centrosymmetric dimers. 相似文献
20.
Andrew Hempel Norman Camerman Zbigniew Dauter Donald Mastropaolo Arthur Camerman 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):455-456
The crystal structure of the title compound, C19H26NO+·Cl? (common name: N,N‐diethyl‐2‐[(4‐phenylmethyl)phenoxy]‐ethanamine hydrochloride), contains one molecule in the asymmetric unit. The planes through the two phenyl rings are roughly perpendicular. Protonation occurs at the N atom, to which the Cl? ion is linked via an N—H?Cl hydrogen bond. The molecule adopts an eclipsed rather than extended conformation. 相似文献