共查询到20条相似文献,搜索用时 31 毫秒
1.
Fatima Lazrak El‐Mokhtar Essassi Brahim El‐Bali Michael Bolte 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):e164-e164
The title compound, 4,7‐dioxa‐10‐thia‐1,12,13‐triazabicyclo[9.3.0]tetradeca‐11,13‐diene, C8H13N3O2S, contains an 11‐membered ring, which appears in a chair conformation and has approximate mirror symmetry. It may be used for the complexation of metal atoms. 相似文献
2.
Won Seok Han Soon W. Lee 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(4):m189-m190
In the title compound, azido‐2κN‐bis[μ‐(1η5:2κP)‐diphenylphosphinocyclopentadienyl][2(η5)‐pentamethylcyclopentadienyl]iron(III)rhodium(III) hexafluorophosphate, [{Rh(C10H15)(N3)}{Fe(μ‐C17H14P)2}]PF6 or [FeRh(C10H15)(μ‐C17H14P)2(N3)]PF6, the coordination sphere of RhIII can be described as pseudo‐tetrahedral, composed of two P atoms from a 1,1′‐bis(diphenylphosphino)ferrocene (dppf) ligand, an azido N atom and the centroid of the ring of a C5Me5 (Cp*) ligand. The two cyclopentadienyl rings in the dppf moiety adopt an eclipsed conformation. The Rh⋯Fe distance is 4.340 (2) Å. 相似文献
3.
Peter G. Jones Jrg Hillmer Henning Hopf 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(5):o301-o304
The title isomers 4,16‐ (pseudo‐ortho), 4,15‐ (pseudo‐gem) and 4,12‐bis(methoxycarbonyl)[2.2]paracyclophane (pseudo‐para), C20H20O4, all show the typical structural features of [2.2]paracyclophanes (flattened boat conformation of the rings, lengthened single bonds in the bridges and narrow ring angles at the bridgehead atoms). The 4,12‐isomer displays crystallographic inversion symmetry. The carbonyl groups adopt a conformation in which they are directed away from the ring systems towards the nearest bridge; the corresponding angle at the ring substituent atom is widened. Crystal packing involves C—H?π interactions for the 4,15‐isomer and weak C—H?O hydrogen bonds for the other two isomers. 相似文献
4.
Anthony Linden Jarosaw Romaski Grzegorz Mlosto Heinz Heimgartner 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(4):o221-o226
Three cage‐like polycyclic compounds, viz.exo‐8‐(trifluoromethyl)pentacyclo[5.4.0.02,6.03,10.05,9]undecan‐endo‐8‐ol, C12H13F3O, 5‐(trifluoromethyl)‐4‐oxahexacyclo[5.4.1.02,6.03,10.05,9.08,11]dodecan‐3‐ol, C12H11F3O2, and N‐[exo‐11‐(trifluoromethyl)‐endo‐11‐(trimethylsilyloxy)pentacyclo[5.4.0.02,6.03,10.05,9]undecan‐8‐ylidene]aniline methanol solvate, C21H24F3NOSi·CH4O, were obtained from the corresponding oxo derivatives by nucleophilic trifluoromethylation with (trifluoromethyl)trimethylsilane in 1,2‐dimethoxyethane solution in the presence of CsF. The crystal structures show that the addition of trifluoromethanide occurs exclusively from the exo face of the polycyclic ketones. Further examination of the crystal structures, together with that of the starting pentacyclo[5.4.0.02,6.03,10.05,9]undecane‐8,11‐dione, C11H10O2, showed that increasing substitution at the 8‐ and/or 11‐positions in the cage molecules increases the non‐bonded intramolecular C·C distances at the mouth of the cage and changes the puckering of the five‐membered rings involving the 8‐ and 11‐positions from an envelope towards a distorted half‐chair conformation. Intermolecular co‐operative O—H·O hydrogen bonds in the endo‐8‐ol compound link the molecules into tetramers. 相似文献
5.
Dens Konya Christian Philouze Yves Gimbert Andrew E. Greene 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(2):o108-o111
Three chiral electron‐deficient phosphine ligands, [(4R,15R)‐,3‐bis(trifluoromethanesulfonyl)perhydro‐1,3,2‐benzodiazaphosphol‐2‐yl]diethylamine, C12H20F6N3O4PS2, (IIIa), [(4R,5R)‐1,3‐bis(trifluoromethanesulfonyl)perhydro‐1,3,2‐benzodiazaphosphol‐2‐yl]dimethylamine, C10H16F6N3O4PS2, (IIIb), and bis[(4R,5R)‐1,3‐bis(trifluoromethanesulfonyl)perhydro‐1,3,2‐benzodiazaphosphol‐2‐yl]methylamine, (IV), as the chloroform solvate, C17H23F12N5O8P2S4·0.98CHCl3, have been prepared from (1R,2R)‐N,N′‐bis(trifluoromethanesulfonyl)‐1,2‐cyclohexanediamine and diethyl phosphoramidous dichloride, dimethyl phosphoramidous dichloride or methyl imidodiphosphorus tetrachloride. The π‐acceptor abilities of these new types of ligands have been evaluated by X‐ray determination of the P—N bond lengths; it has been found that the most promising ligand is the bis(phosphine) (IV). 相似文献
6.
Seik Weng Ng S. Shanmuga Sundara Raj Hoong‐Kun Fun Ibrahim Abdul Razak James M. Hook 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(8):966-968
catena‐Poly[dicyclohexylammonium [tributyltin‐μ‐(4‐oxo‐4H‐pyran‐2,6‐dicarboxylato‐O2:O6)]], (C12H24N)[Sn(C7H2O6)(C4H9)3], consists of 4‐oxo‐4H‐pyran‐2,6‐dicarboxylato groups that axially link adjacent tributyltin units into a linear polyanionic chain. The ammonium counter‐ions surround the chain, and each cation forms a pair of hydrogen bonds to the double‐bond carbonyl O atoms of the same dianionic group. The chain propagates in a zigzag manner along the c axis of the monoclinic cell. In catena‐poly[methyl(phenyl)ammonium [tributyltin‐μ‐(pyridine‐2,6‐dicarboxylato‐O2:O6)]], (C7H10N)[Sn(C7H3NO4)(C4H9)3], the pyridine‐2,6‐dicarboxylato groups also link the tributyltin groups into a chain, but the hydrogen‐bonded chain propagates linearly on the ac face of the monoclinic cell. 相似文献
7.
Alexander J. Blake Lorenzo Tei Claire Wilson Martin Schrder 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(2):m43-m45
The asymmetric unit of {[4,7‐bis(2‐aminoethyl)‐1,4,7‐triazacyclononan‐1‐yl]acetato}zinc(II) triaqua{μ‐[4,7‐bis(2‐aminoethyl)‐1,4,7‐triazacyclononan‐1‐yl]acetato}lithium(I)zinc(II) chloride diperchlorate, [Zn(C12H26N5O2)][LiZn(C12H26N5O2)(H2O)3]Cl(ClO4)2, obtained from the reaction between the lithium salt of 4,7‐bis(2‐aminoethyl)‐1,4,7‐triazacyclononane‐1‐acetate and Zn(ClO4)2, contains two ZnII complexes in which each ZnII ion is six‐coordinated by five N‐atom donors and one O‐atom donor from the ligand. One carboxylate O‐atom donor is not involved in coordination to a ZnII atom, but coordinates to an Li+ ion, the tetrahedral geometry of Li+ being completed by three water molecules. The two complexes are linked via a hydrogen bond between a primary amine N—H group and the carboxylate‐O atom not involved in coordination to a metal. 相似文献
8.
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
9.
Jrg Saßmannshausen Jrg Rust Richard Goddard 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):e236-e237
The title compound, [Zr(C7H7)3(C15H17)], (I), crystallizes from light petroleum with two independent molecules in the asymmetric unit. Whereas in the parent molecule, Zr(η5‐C5H5)(CH2Ph)3, all three Zr—CH2Ph angles are equal, in (I), they differ significantly. In spite of their different environments, both independent molecules in (I) exhibit a small, an expected, and a large Zr—CH2Ph angle. The angles are similar to those of the closely related tribenzyl[η5‐(benzyldimethylsilyl)cyclopentadienyl]zirconium complex. The smallest Zr—CH2Ph angle and the consequently relatively short Zr?Cipso distance are indicative of η2‐bonding of the benzyl group. 相似文献
10.
Il Yoon Byeong Soon Yoo Shim Sung Lee Bong Gon Kim 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(7):758-759
The preparation and crystal structure of the title compound, cis‐dichloro[6,9‐dioxa‐3,12‐dithiabicyclo[12.4.0]octadeca‐14,‐16,18(1)‐triene‐S,S′]palladium(II), [PdCl2(C14H20O2S2)], are described. The Pd atom has a square‐planar environment, coordinated to two S atoms of the dithiadioxa macrocycle and to two Cl? ions. The non‐coordinating O atoms are oriented away from the metal coordination plane. Upon complexation, a bicyclic chelate structure, which consists of a seven‐ and an eleven‐membered ring, is formed. 相似文献
11.
Marina S. Fonari Yurii A. Simonov Yurii M. Chumakov Gabriele Bocelli Eduard V. Ganin Vladimir O. Gelmboldt 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(5):m168-m170
X‐ray data were obtained for the monoclinic polymorph of rac‐5,7,7,12,12,14‐hexamethyl‐1,4,8,11‐tetraazoniacyclotetradecane bis(hexafluorogermanate) tetrahydrate, (C16H40N4)[GeF6]2·4H2O. The tetraaza‐macrocyclic cations lie across inversion centers in space group P21/c. Water molecules and [GeF6]2− anions form zigzag chains, which alternate in a three‐dimensional network with the macrocyclic cations. The structure is sustained by multiple hydrogen bonds. 相似文献
12.
Jeffrey C. Bryan Jerme M. Lavis Benjamin P. Hay Richard A. Sachleben 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(3):391-392
The structure of the title compound, 25‐ethyl‐2,5,12,15,22,28‐hexaoxa‐25‐azatetracyclo[27.4.0.06,11.016,21]tritriaconta‐1(29),6(11),7,9,16(21),17,19,30,32‐nonaene, C28H33NO6, does not exhibit a binding cavity for cations, but is collapsed in on itself. The conformation is unique among known tribenzo‐21‐crown‐7 structures, and may be a result of intermolecular (C—H?π) and intramolecular (C—H?O) hydrogen bonding. 相似文献
13.
Robert J. Hinkle Robert McDonald 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(2):o117-o121
The crystal structures of [(Z)‐2‐methylbut‐1‐en‐1‐yl][4‐(trifluoromethyl)phenyl]iodonium trifluoromethanesulfonate, C12H13F3I+·CF3O3S?, (I), (3,5‐dichlorophenyl)[(Z)‐2‐methylbut‐1‐en‐1‐yl]iodonium trifluoromethanesulfonate, C11H12Cl2I+·CF3O3S?, (II), and bis{[3,5‐bis(trifluoromethyl)phenyl][(Z)‐2‐methylbut‐1‐en‐1‐yl]iodonium} bis(trifluoromethanesulfonate) dichloromethane solvate, 2C13H12F6I+·2CF3O3S?·CH2Cl2, (III), are described. Neither simple acyclic β,β‐dialkyl‐substituted alkenyl(aryl)idonium salts nor a series containing electron‐deficient aryl rings have been described prior to this work. Compounds (I)–(III) were found to have distorted square‐planar geometries, with each I atom interacting with two trifluoromethanesulfonate counter‐ions. 相似文献
14.
Thierry Le Borgne Pierre Thury Michel Ephritikhine 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):m8-m9
The ligand 1,2,3,4‐tetramethyl‐5‐(2‐pyridyl)cyclopentadiene (cp*py) forms a dinuclear complex with UIV, i.e. di‐μ‐oxo‐bis{chloro(diethyl ether‐κO)[(η5,κN)‐1,2,3,4‐tetramethyl‐5‐(2‐pyridyl)cyclopentadienyl]uranium(IV)}, [U2Cl2O2(C14H16N)2(C4H10O)2], in which cp*py acts as a chelating ligand, being bound to the metal atom by the cyclopentadienyl unit and also by the N atom of the pyridyl ring. 相似文献
15.
Jie Chen Ning‐Hai Hu Jie Zhan Yue‐Sheng Li 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(7):m337-m338
A new polynuclear titanium(IV) complex, dichlorodeca‐μ2‐oxo‐hexakis(pentamethylcyclopentadienyl)hexatitanium(IV), [Ti6(C10H15)6Cl2O10], has been synthesized by hydrolysis of a titanium complex bearing an N‐(2‐hydroxy‐3,5‐dimethylbenzyl)diethanolamine Mannich ligand. The molecule has two O‐bridged Ti3O3 rings linked to two similar rings through a tetrahedrally O‐coordinated Ti atom. All Ti atoms except the central one are coordinated to pentamethylcyclopentadienyl (Cp*) ligands. The Cp* ligands are arranged with approximate symmetry with respect to the Ti/O/Cl core. 相似文献
16.
Alexander J. Blake Peter Hubberstey Alexander D. Mackrell Claire Wilson 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(6):o293-o297
The trans–trans conformations adopted by the derivatized bis(bidentate) chelating N4‐donor ligand 3,6‐bis(pyrazol‐1‐yl)‐4‐[2‐(4‐thiamorpholino)ethanesulfanyl]pyridazine, C16H19N7S2, and an intermediate in its formation, 3,6‐dichloro‐4‐[2‐(4‐thiamorpholino)ethanesulfanyl]pyridazine, C10H13Cl2N3S2, contrast with the cis–cis conformation found previously for 3,6‐bis(thiophen‐2‐yl)pyridazine [Ackers, Blake, Hill & Hubberstey (2002). Acta Cryst. C 58 , o640–o641], which places all four heteroatoms on the same side of the molecule. 相似文献
17.
David G. Billing Andreas Lemmerer 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(7):m269-m271
The title compound, (C8H16N)2[PbI4], crystallizes as an inorganic–organic hybrid perovskite, adopting the unusual 2ap× 2ap superstructure. As such, the structure consists of two‐dimensional sheets of corner‐sharing PbI6 octahedra in the ab plane, separated by bilayers of 2‐(1‐cyclohexenyl)ethylammonium cations. The ethylammonium groups are not in the plane of the cyclohexenyl rings. 相似文献
18.
Christoph Hollmann Markus Schürmann Hans Preut Peter Eilbracht 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(5):e215-e215
The title compound, C16H26O2, (I), prepared by oxidation of (1R*,11R*)‐12‐hydroxybicyclo[9.4.1]hexadecan‐16‐one using pyridinium dichromate, has a trans configuration of the two fused rings and represents an interesting precursor for the synthesis of macrocyclic structures. 相似文献
19.
Kanji Kubo Nobuo Kato Akira Mori Hitoshi Takeshita 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):644-646
The structures of the title compound, C20H24N2O4S2, and its mercury(II) dichloride complex, dichloro{20‐dicyanomethylene‐5,8,11,14‐tetraoxa‐2,17‐dithiabicyclo[16.4.1]tricosa‐1(23),18,21‐triene‐κ4O,κS17}mercury(II), [HgCl2(C20H24N2O4S2)], have been determined by X‐ray crystallographic analyses. The mercury(II) dichloride complex has two independent molecules of [HgCl2(C20H24N2O4S2)] in the lattice. The mercury(II) ion has pentagonal bipyramidal coordination which involves one S atom, four O atoms and two Cl? ions. 相似文献
20.
Tamami Koshiyama Masako Kato 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(11):m446-m449
The title PtII complexes, viz. (2,2′‐bipyridine‐κ2N,N′)[(1R,2R)‐1,2‐diaminocyclohexane‐κ2N,N′]platinum(II) bis(hexafluorophosphate), [Pt(C6H14N2)(C10H8N2)](PF6)2, and [(1R,2R)‐1,2‐diaminocyclohexane‐κ2N,N′](1,10‐phenanthroline‐κ2N,N′)platinum(II) bis(hexafluorophosphate), [Pt(C6H14N2)(C12H8N2)](PF6)2, containing an aromatic α‐diimine and a non‐planar diaminocyclohexane, both form a ladder‐type structure, which is constructed via loose π–π stacking on the α‐diimine ligands and hydrogen bonding between the cyclic amines and the counter‐anions. In the former compound, there are two independent complex cations, both of which have a twofold axis through the Pt atom. 相似文献