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1.
Paul V. Bernhardt 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(7):744-746
The title pendent‐arm macrocyclic hexaamine ligand binds stereospecifically in a hexadentate manner, and we report here its isomorphous NiII and ZnII complexes (both as perchlorate salts), namely (cis‐6,13‐dimethyl‐1,4,8,11‐tetraazacyclotetradecane‐6,13‐diamine‐κ6N)nickel(II) diperchlorate, [Ni(C12H30N6)](ClO4)2, and (cis‐6,13‐dimethyl‐1,4,8,11‐tetraaza‐cyclotetradecane‐6,13‐diamine‐κ6N)zinc(II) diperchlorate, [Zn(C12H30N6)](ClO4)2. Distortion of the N—M—N valence angles from their ideal octahedral values becomes more pronounced with increasing metal‐ion size and the present results are compared with other structures of this ligand. 相似文献
2.
J. Wilson Quail John A. Weil Malvinder P. Singh 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(2):235-236
The title molecule (DMPH‐H), C8H9N5O6, was investigated to provide comparison with 2,2‐diphenyl‐1‐picrylhydrazine, which unlike DMPH‐H is readily oxidizable to form a well known stable free radical (DPPH). The structure shows essential differences in the configuration of the hydrazine‐N atoms, the ortho‐nitro group orientations and the crystal packing. The bond angles of the dimethylamino N atom [107.90 (13), 108.96 (12) and 112.21 (13)°] are consistent with a tetrahedral N atom and sp3 hybridization. 相似文献
3.
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
4.
Russell G. Baughman Kenneth L. Martin Rajendra K. Singh James O. Stoffer 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(2):o103-o106
In 2,4‐dihydroxybenzaldehyde 2,4‐dinitrophenylhydrazone N,N‐dimethylformamide solvate {or 4‐[(2,4‐dinitrophenyl)hydrazonomethyl]benzene‐1,3‐diol N,N‐dimethylformamide solvate}, C13H10N4O6·C3H7NO, (X), 2,4‐dihydroxyacetophenone 2,4‐dinitrophenylhydrazone N,N‐dimethylformamide solvate (or 4‐{1‐[(2,4‐dinitrophenyl)hydrazono]ethyl}benzene‐1,3‐diol N,N‐dimethylformamide solvate), C14H12N4O6·C3H7NO, (XI), and 2,4‐dihydroxybenzophenone 2,4‐dinitrophenylhydrazone N,N‐dimethylacetamide solvate (or 4‐{[(2,4‐dinitrophenyl)hydrazono]phenylmethyl}benzene‐1,3‐diol N,N‐dimethylacetamide solvate), C19H14N4O6·C4H9NO, (XII), the molecules all lack a center of symmetry, crystallize in centrosymmetric space groups and have been observed to exhibit non‐linear optical activity. In each case, the hydrazone skeleton is fairly planar, facilitated by the presence of two intramolecular hydrogen bonds and some partial N—N double‐bond character. Each molecule is hydrogen bonded to one solvent molecule. 相似文献
5.
Ying‐Quan Zou Xia Li Yan Li Huai‐Ming Hu 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(9):1048-1050
The title compound, tetrakis(μ‐2,3‐dimethoxybenzoato)‐κ4O:O′;κ6O,O′:O′‐bis[(2,2′‐bipyridine‐N,N′)(2,3‐dimethoxybenzoato‐O,O′)lanthanum(III)], [La2(2,3‐DMOBA)6(2,2′‐bpy)2], where 2,3‐DMOBA is 2,3‐dimethoxybenzoate (C9H9O4) and 2,2′‐bpy is 2,2′‐bipyridine (C10H8N2), is a dimer with a centre of inversion between the La atoms bridged by four carboxylate ligands. The central La atom is ennea‐coordinated and has a distorted monocapped square‐antiprism geometry. 相似文献
6.
Poly[[μ2‐aqua‐bis[(1,10‐phenanthroline)nickel(II)]]‐di‐μ2,μ4‐5‐nitro‐1,3‐benzenedicarboxylato]
Hong‐Yin He Yi‐Li Zhou Long‐Guan Zhu 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(11):m569-m571
The reaction of Ni(CH3COO)2·4H2O, 5‐nitro‐1,3‐benzenedicarboxylic acid (H2nmbdc), 1,10‐phenanthroline and water under hydrothermal conditions yields the first reported two‐dimensional nickel coordination polymer with water‐ and carboxylate‐bridged dimeric units, viz. [Ni2(C8H3NO6)2(C12H8N2)2(H2O)]n. The coordination polyhedron of the NiII ion in the title structure is an octahedron defined by an N2O4 donor set. The water molecule is positioned on a mirror plane and the 5‐nitro‐1,3‐benzenedicarboxylate group is located on a twofold axis. Two types of nmbdc2− coordination mode are observed: one is a bis‐monodentate mode, μ2‐nmbdc2−, and the other is a bis‐bridging mode, μ4‐nmbdc2−. The dimeric unit in the title compound is similar to the structural moiety in urease. In the two‐dimensional framework in the title compound, strong stacking interactions between benzene rings (μ2‐nmbdc2− and μ4‐nmbdc2−) and 1,10‐phenanthroline ligands are observed. 相似文献
7.
Cengiz Arici Filiz Ercan Raif Kurtaran Orhan Atakol 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(7):812-814
In the title compounds, {2,2′‐[2,2‐dimethyl‐1,3‐propanediylbis(nitrilomethylidyne)]diphenolato‐κ4N,N′,O,O′}nickel(II), [Ni(C19H20N2O2)], and {2,2′‐[2,2‐dimethyl‐1,3‐propanediylbis(nitrilomethylidyne)]diphenolato‐κ4N,N′,O,O′}copper(II), [Cu(C19H20N2O2)], the NiII and CuII atoms are coordinated by two iminic N and two phenolic O atoms of the N,N′‐bis(salicylidene)‐2,2‐dimethyl‐1,3‐propanediaminate (SALPD2?, C17H16N2O22?) ligand. The geometry of the coordination sphere is planar in the case of the NiII complex and distorted towards tetrahedral for the CuII complex. Both complexes have a cis configuration imposed by the chelate ligand. The dihedral angles between the N/Ni/O and N/Cu/O coordination planes are 17.20 (6) and 35.13 (7)°, respectively. 相似文献
8.
Rita Song Kwan Mook Kim Youn Soo Sohn 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(12):m555-m557
The title compound, [Pt(C6H10NO2)(C5H14N2)]2(SO4), crystallizes with two cations in the asymmetric unit. The two complex cations, which have a square‐planar PtII coordination, are chemically identical but differ slightly in the conformations of their amine groups. A neutral complex, viz. (2,2‐dimethyl‐1,3‐propanediamine‐κ2N,N′)bis(2‐piperidinecarboxylato‐κN)platinum(II), is shown to form in solution and to change rapidly into the title compound. 相似文献
9.
Ahmet Karadag Hümeyra Paaoglu Gkhan Kata Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(11):m581-m583
The title compound, catena‐poly[[μ‐cyano‐1:2κ2C:N‐dicyano‐1κ2C‐trans‐bis[N‐(2‐hydroxyethyl)ethane‐1,2‐diamine‐2κ2N,N′]cadmium(II)nickel(II)]‐μ‐cyano‐1:2′κ2C:N], [CdNi(CN)4(C4H12N2O)2], consists of alternating square‐planar Ni(CN)4 fragments, formally dianionic, and Cd(hydet‐en)2 moieties [hydet‐en is N‐(2‐hydroxyethyl)ethylenediamine], with the two bridging cyanide ligands in a mutually trans disposition at the Ni atom and cis at the Cd atom. The resulting one‐dimensional zigzag chain structure has the Ni atom on an inversion center, while the distorted octahedron centered on the Cd atom lies on a twofold axis. The polymer chains are connected into undulating sheets by weak interchain N—H⋯N, N—H⋯O and O—H⋯N hydrogen bonds, which are also present between successive sheets. 相似文献
10.
Yang Kim Brian W. Skelton Allan H. White 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(12):m546-m548
In title anhydrous catena‐poly[[trans‐bis(ethane‐1,2‐diamine‐κ2N,N′)copper(II)]‐μ‐dithionato‐κ2O:O′], [Cu(S2O6)(C2H8N2)2]n or [{H2N(CH2)2NH2}2Cu(O·O2SSO2·O)]∞, successive Cu atoms are bridged by a single doubly charged dithionate group, forming a one‐dimensional polymer with inversion centres at the metal atoms and the mid‐point of the S—S bond [Cu—O = 2.5744 (15) Å]. In title (hydrated) trans‐diaquabis(propane‐1,3‐diamine‐κ2N,N′)copper(II) dithionate, [Cu(C3H10N2)2(H2O)2](S2O6) or [{H2N(CH2)3NH2}2Cu(OH2)2](S2O6), both ions have imposed 2/m symmetry. The `axial' anion components are displaced by a pair of water ligands [Cu—O = 2.439 (3) Å], the shorter Cu—O distance being compensated by the lengthened Cu—N distance [2.0443 (18), cf. 2.0100 (13) and 2.0122 (16) Å]. 相似文献
11.
Simon J. Garden Fernanda R. da Cunha James L. Wardell Janet M. S. Skakle John N. Low Christopher Glidewell 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(8):o463-o466
In 2,6‐diiodo‐4‐nitrophenol, C6H3I2NO3, the molecules are linked, by an O—H?O hydrogen bond and two iodo–nitro interactions, into sheets, which are further linked into a three‐dimensional framework by aromatic π–π‐stacking interactions. The molecules of 2,6‐diiodo‐4‐nitrophenyl acetate, C8H5I2NO4, lie across a mirror plane in space group Pnma, with the acetyl group on the mirror, and they are linked by a single iodo–nitro interaction to form isolated sheets. The molecules of 2,6‐diiodo‐4‐nitroanisole, C7H5I2NO3, are linked into isolated chains by a single two‐centre iodo–nitro interaction. 相似文献
12.
Andrei S. Batsanov 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):e269-e270
The molecule of 3,5‐difluoro‐4‐nitropyridine N‐oxide, C5H2F2N2O3, is twisted around the C—NO2 bond by 38.5 (1)°, while the 3,5‐diamino analogue, 3,5‐diamino‐4‐nitropyridine N‐oxide monohydrate, C5H6N4O3·H2O, adopts a planar conformation stabilized by intramolecular hydrogen bonds, with a significant redistribution of π electrons. 相似文献
13.
Ayhan Elmali Yalin Elerman Ingrid Svoboda 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):423-424
In the title compound, {4,4′‐dibromo‐2,2′‐[o‐phenylenebis(nitrilomethylidene)]diphenolato‐O,N,N′,O′}copper(II), [Cu(C20H12Br2N2O2], the CuII ion shows a slightly distorted square‐planar geometry with the N2O2 atoms of the Schiff base imine–phenol tetradentate ligand. 相似文献
14.
Liang Shen Yi‐Jian Zhang Guo‐Ding Sheng Hua‐Tong Wang 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(7):m382-m384
The title binuclear complex, [CuFe(CN)5(C8H21N5O2)(NO)]·2H2O or [CuFe(nelin)(CN)5(NO)]·2H2O (nelin is 5‐methyl‐5‐nitro‐3,7‐diazanonane‐1,9‐diamine) consists of discrete binuclear mixed‐metal species, with a Cu centre linked to an Fe centre through a cyano bridge, and two water molecules of crystallization. In the complex, the CuII ion is coordinated by five N atoms and has a distorted square‐pyramidal geometry. The FeII centre is in a distorted octahedral environment. 相似文献
15.
Hiroyuki Hosomi Shigeru Ohba Yoshikatsu Ito 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):e260-e261
In the title two adducts, C3H12N22+·2C9H6NO4?, (I), and C6H16N22+·2C9H6NO4?, (II), hydrogen bonds between the diammonium and carboxylate ions form a two‐dimensional network parallel to the ab plane in (I) and one‐dimensional chains along the c axis in (II). The cyclohexanediammonium ion in (II) has a crystallographic twofold axis. 相似文献
16.
Andrew Hempel Norman Camerman Donald Mastropaolo Arthur Camerman 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(8):1048-1049
In the title compound, dimethyl({5‐[2‐(1‐methylamino‐2‐nitroethenylamino)ethylthiomethyl]‐2‐furyl}methyl)ammonium chloride, C13H23N4O3S+·Cl?, protonation occurs at the dimethylamino N atom. The ranitidine molecule adopts an eclipsed conformation. Bond lengths indicate extensive electron delocalization in the N,N′‐dimethyl‐2‐nitro‐1,1‐ethenediamine system of the molecule. The nitro and methylamino groups are trans across the side chain C=C double bond, while the ethylamino and nitro groups are cis. The Cl? ions link molecules through hydrogen bonds. 相似文献
17.
Dorothy H. Gibson Mark S. Mashuta Xiaolong Yin 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(8):m366-m367
The title organometallic compound, fac‐tricarbonyl‐2κ3C‐(4,4′‐dimethyl‐2,2′‐bipyridine)‐2κ2N,N′‐triphenyl‐1κ3C1‐tin(II)rhenium(I)(Sn—Re), [ReSn(C6H5)3(C12H12N2)(CO)3], contains three unique π–π stacking interactions. The result is an infinite chain of uninterrupted alternating intra‐ and intermolecular offset π–π stacking interactions throughout the crystal lattice. This extended π–π stacking arrangement, and an additional isolated intramolecular π–π interaction between the remaining 4,4′‐dimethyl‐2,2′‐bipyridine ring and a second phenyl group, impose geometric constraints on the Re and Sn atoms, yielding distorted octahedral and tetrahedral coordinations, respectively, for the metal centers. 相似文献
18.
Dale C. Swenson Xiaobang Gao Donald J. Burton 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(8):1040-1041
The title triene, C18H10F6, was prepared via the Pd0 coupling reaction of (E)‐(1,2‐difluoro‐1,2‐ethenediyl)bis(tributylstannane) with (Z)‐β‐iodo‐α,β‐difluorostyrene in N,N′‐dimethylformamide/tetrahydrofuran. The crystal structure shows the product to be the 1E,3E,5E isomer. Due to steric interactions between F atoms, the double bonds are not coplanar. The planes defined by the two terminal double bonds are almost perpendicular. 相似文献
19.
Hiroyuki Hosomi Shigeru Ohba Yoshikatsu Ito 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):e149-e150
In the three title crystal structures 4‐(dimethylamino)pyridinium 2,4‐dinitrobenzoate, (I), 4‐(dimethylamino)pyridinium 3,4‐dinitrobenzoate, (II), and 4‐(dimethylamino)pyridinium 3,5‐dinitrobenzoate, (III), all C7H11N2+·C7H3N2O6?, the ions are connected by an N—H?O hydrogen bond. Dihedral angles between the pyridine and phenyl rings are 69.9 (1), 26.7 (1) and 56.2 (1)° in (I), (II) and (III), respectively. Donor–acceptor π–π stacking is observed in (II) and (III), but not in (I). 相似文献
20.
Rita Song Kwan Mook Kim Youn Soo Sohn 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(10):e447-e447
The title compound, catena‐poly[[[triaqua‐2κ3O‐(2,2‐dimethyl‐1,3‐propanediamine)‐1κ2N,N′‐μ‐isonicotinato‐1:2κ2N:O‐copper(II)platinum(II)]‐μ‐isonicotinato‐2:1′κ2O:N] dinitrate], {[CuPt(C6H4NO2)2(C5H14N2)(H2O)3](NO3)2}n, obtained from equimolar (dmpda)PtII(isonic)2 (where dmpda is 2,2‐dimethyl‐1,3‐propanediamine and isonic is isonicotinate) and copper(II) nitrate, has been found to be a one‐dimensional coordination polymer of the zigzag‐type. 相似文献