oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Trichloridotris{N-[phenyl(pyridin-2-yl)methylidene]hydroxylamine-κ2N,N′}neodymium(III)  [cached]
Hua Yang
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812014055
Abstract: In the title compound, [NdCl3(C12H10N2O)3], the central NdIII ion is nine-coordinated by six N atoms from three bidentate chelate N-[phenyl(pyridin-2-yl)methylidene]hydroxylamine ligands and three Cl ions, and displays a distorted tricapped trigonal prismatic geometry. The complex molecules are stabilized by intramolecular O—H...Cl hydrogen bonds.
(E)-4-{2-[(2-Hydroxynaphthalen-1-yl)methylidene]hydrazinecarbonyl}pyridinium nitrate
Rahman Bikas,Hassan Hosseini Monfared,Tadeusz Lis,Milosz Siczek
Acta Crystallographica Section E , 2012, DOI: 10.1107/s160053681200061x
Abstract: The title compound, C17H14N3O2+·NO3 , is an aroylhydrazone-based material consisting of a 4-(hydrazinecarbonyl)pyridinium cation and a nitrate anion. In the cation, the dihedral angle between the benzene ring and the naphthalene ring system is 2.20 (7)°. In the cation, the configuration about the C=N bond is E. There is an intramolecular O—H...N hydrogen bond in the cation, and the supramolecular structure is stabilized by intermolecular N—H...O hydrogen bonds and weak C—H...O contacts between the cation and the nitrate anion.
catena-Poly[[[iodidocopper(I)]-{μ-N-[(pyridin-2-yl-κN)methylidene]pyridin-3-amine-κ2N3:N1}] acetonitrile hemisolvate]  [cached]
Ali Mahmoudi,Saeed Dehghanpour,Mojtaba Babakhodaverdi
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812037270
Abstract: In the asymmetric unit of the title polymeric complex, {[CuI(C11H9N3)]·0.5CH3CN}n, there are two CuI atoms, two N-[(pyridin-2-yl-κN)methylidene]pyridin-3-amine (PyPy) ligands and two I atoms. Both CuI atoms have a distorted tetrahedral geometry, each being coordinated by one I atom, two N atoms of one PyPy ligand and one N atom from an adjacent PyPy ligand. In the crystal, infinite helical chains of [Cu2(PyPy)2]n are formed propagating along the b axis. These chains are linked via weak C—H...I hydrogen bonds and π–π stacking interactions [shortest centroid–centroid distance = 3.2727 (14) ]. During the refinement, electron-density peaks were located that were believed to be highly disordered solvent molecules (possibly acetonitrile). The SQUEEZE option in PLATON [Spek (2009). Acta Cryst. D65, 148–155] indicated there were solvent cavities with a total volume of 196 3 containing approximately 60 electrons per unit cell, which equated to one molecule of acetonitrile per asymmetric unit.
Aqua[1-(pyridin-2-yl)ethanone oximato][1-(2-pyridin-2-yl)ethanone oxime]copper(II) perchlorate monohydrate  [cached]
Baoyun Zhong,Shengli Li,Guifang Chen
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812023872
Abstract: In the title compound, [Cu(C7H7N2O)(C7H8N2O)(H2O)]ClO4·H2O, the CuII ion is five-coordinated by the N atoms from the 1-(pyridin-2-yl)ethanone oximate and 1-(pyridin-2-yl)ethanone oxime ligands and by the water O atom in a distorted square-pyramidal geometry. The two organic ligands are linked by an intramolecular O—H...O hydrogen bond. In the crystal, molecules and ions are linked by O—H...O hydrogen-bonding interactions, forming chains along the a axis. The perchlorate O atoms are disordered in a 0.58 (2):0.42 (2) ratio.
(4-{[(Pyridin-4-yl)methylidene]amino}phenyl)ferrocene  [cached]
Vincent O. Nyamori,Godfrey Keru,Bernard Omondi
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812047812
Abstract: The asymetric unit of the title compound, [Fe(C5H5)(C17H13N2)], contains two independent molecules whose conformations differ, especially in the 4-{(pyridin-4-yl)methylidene]amino}phenyl unit where one is flipped by almost 180°. The cyclopentadienyl rings of the ferrocene unit also exhibit different staggered conformations: in one molecule the conformation is staggered by 9.43 (2)° and in the other by 24.46 (1)° from an ideal eclipsed geometry. The plane of the benzene ring is tilted away from the ferrocene group in both molecules, with dihedral angles of 6.97 (1) and 10.30 (2)°. The benzene ring is also slightly twisted from the plane of the pyridine ring, with dihedral angles of 5.98 (2) and 6.51 (2)° in the two molecules.
4-(2-Cyanoethylsulfanyl)-5′-(pyridin-4-yl)tetrathiafulvalene
Haiyun Li,Guannan Wang,Xunwen Xiao
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811018800
Abstract: In the title compound, C14H10N2S5 [systematic name; 3-({2-[4-(pyridin-4-yl)-2H-1,3-dithiol-2-ylidene]-2H-1,3-dithiol-4-yl}sulfanyl)propanenitrile], all of the non-H atoms except for the cyanoethylsulfanyl group, are approximately coplanar [maxium deviation = 0.090 (3) ]. The two five-membered 1,3-dithiole rings are twisted by 2.6 (2)°. Weak intermolecular S...S interactions occur [3.586 (4) and 3.530 (4) ].
Bis[μ-2-(pyridin-2-yl)ethanolato]bis[bromidocopper(II)]  [cached]
M. Mobin Shaikh,Saloni Mathur,Md. Jamal Uddin
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811043637
Abstract: The title compound, [Cu2Br2(C7H8NO)2], was synthesized by reaction of CuBr2 with 2-(pyridin-2-yl)ethanol (hep-H) in methanol. The asymmetric unit consists of one hep ligand and a CuBr unit. The Cu2+ ion is thereby coordinated by the N atom and the deprotonated hydroxy O atom in a distorted square-planar geometry that is completed by another O atom. The latter acts as bridging ligand towards the second, symmetry-equivalent, Cu atom, thus generating a centrosymmetric dimeric unit, with the inversion centre halfway between the Cu atoms. These units are linked via C—H...Br and C—H...O hydrogen bonds, leading to the formation of a hydrogen-bonded one-dimensional-polymeric chain along a..
Bis(acetato-κO)bis[2-(pyridin-2-yl)ethanol-κ2N,O]copper(II)
Katja Lapanje,Ivan Leban,Nina Lah
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812015747
Abstract: The title compound, [Cu(CH3COO)2(C7H9NO)2], is a monomeric complex with an octahedral geometry. The CuII atom is located on an inversion center and is coordinated by acetate and 2-(pyridin-2-yl)ethanol ligands. The acetate group is coordinated in a monodentate manner, while the 2-(pyridin-2-yl)ethanol is coordinated as a bidentate ligand involving the endocyclic N atom and the hydroxy O atom of the ligand side chain. An intramolecular hydrogen bond is observed between the hydroxy O atom and the non-coordinated acetate O atom. No classical intermolecular hydrogen-bond contacts were observed. However, the crystal packing is effected by C—H...O interactions, which link the mononuclear entities into layers parallel to the bc plane.
Bis[2-(pyridin-2-yl)ethanol-κ2N,O]bis(thiocyanato-κN)nickel(II)  [cached]
Lei Lv,Xiumin Qiu,Jie Yang,Shizheng Liu
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810046647
Abstract: In the title complex, [Ni(NCS)2(C7H9NO)2], the NiII atom is in a distorted octahedral coordination environment defined by two N atoms of the two thiocyanate ions and by the N and O atoms of the two chelating 2-(pyridin-2-yl)ethanol ligands. The complex molecule is located around a crystallographic inversion center. In the crystal, molecules are connected into a two-dimensional polymeric structure parallel to (100) by O—H...S hydrogen bonds.
Dichlorido[2-(pyridin-2-yl)-N-(pyridin-2-ylmethylidene)ethanamine-κ3N,N′,N′′]manganese(II) monohydrate
Daniel Tinguiano,Ibrahima Elhadj Thiam,Moussa Dieng,Mohamed Gaye
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812037877
Abstract: In the title complex, [MnCl2(C13H13N3)]·H2O, the MnII atom is in a distorted square-pyramidal environment, with an Addison τ parameter of 0.037. The coordination geometry is defined by three N-atom donors from the tridentate 2-(pyridin-2-yl)-N-(pyridin-2-ylmethylidene)ethanamine ligand and two terminal Cl atoms. Although the H atoms of the lattice water molecule were not located, O...O distances of 3.103 (7) and O...Cl distances of 3.240 (3) and 3.482 (4) suggest that hydrogen bonding is responsible for the stabilization of the crystal packing.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.