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
{N,N′-Bis[1-(2-pyridyl)ethylidene]ethane-1,2-diamine-κ4N,N′,N′′,N′′′}(thiocyanato-κN)zinc(II) perchlorate
Fu-Ming Wang
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810021628
Abstract: In the title compound, [Zn(NCS)(C16H18N4)]ClO4, the ZnII atom is five-coordinated by four N atoms of the Schiff base ligand N,N′-bis[1-(2-pyridyl)ethylidene]ethane-1,2-diamine in the basal plane, and by the N atom of a thiocyanate ligand at the apical position, forming a distorted square-pyramidal geometry. The r.m.s. deviation from a plane through the four N atoms of the Schiff base is 0.015 (3) , and the deviation of the Ni atom from that plane is 0.591 (2) . Bond lengths are comparable with those observed in similar zinc(II) complexes with Schiff bases. The two methylene C atoms of the ethane-1,2-diamine bridge of the Schiff base ligand are disordered over two sites with occupancies of 0.587 (3) and 0.413 (3).
Dichlorido{N-[1-(pyrazin-2-yl)ethylidene-κN1]ethane-1,2-diamine-κ2N,N′}zinc  [cached]
Jia-Cheng Liu,Meng Li,Abedelwahed Saeed Mohammed Omer,Yun Wei
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811042115
Abstract: The ZnII atom in the title complex, [ZnCl2(C8H12N4)], is coordinated by two Cl atoms and three N atoms of the N-[1-(pyrazin-2-yl)ethylidene]ethane-1,2-diamine ligand, and displays a distorted square-pyramidal geometry with the apical position occupied by a Cl atom. In the crystal, intermolecular N—H...Cl and C—H...Cl hydrogen bonds link the molecules into a three-dimensional framework.
{N,N′-Bis[1-(2-pyridyl)ethylidene]ethane-1,2-diamine-κ4N,N′,N′′,N′′′}bis(trifluoromethanesulfanato-κO)copper(II)
Simon J. Coles,Abdurrahman Sengul,Ozgur Kurt,Safinaz Altin
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808033151
Abstract: A discrete neutral CuII complex, [Cu(CF3SO3)2(C16H18N4)], has been derived from the symmetrical tetradentate Schiff base, N,N′-bis[1-(pyridin-2-yl)ethylidene]ethane-1,2-diamine. The copper centre assumes a tetragonally distorted pseudo-octahedral geometry with the O atoms of two trifluoromethanesulfonate anions coordinated weakly in the axial positions. The Cu—N distances lie in the range 1.941 (3)–2.011 (3) and the Cu—O distances are 2.474 (3) and 2.564 (3) .
Dichlorido{N,N-dimethyl-N′-[1-(2-pyridyl)ethylidene]ethane-1,2-diamine-κ3N,N′,N′′}manganese(II)
Nurul Azimah Ikmal Hisham,Nura Suleiman Gwaram,Hamid Khaledi,Hapipah Mohd Ali
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811002030
Abstract: The asymmetric unit of the title compound, [MnCl2(C11H17N3)], contains two crystallographically independent molecules with slightly different geometries. In each molecule, the MnII ion is five coordinated by the N,N′,N′′-tridentate Schiff base and two Cl atoms in a distorted square-pyramidal geometry. In the crystal, C—H...Cl hydrogen bonds link adjacent molecules into a three-dimensional network.
Dichlorido{N,N-dimethyl-N′-[1-(2-pyridyl)ethylidene]ethane-1,2-diamine-κ3N,N′,N′′}zinc
Nura Suleiman Gwaram,Hamid Khaledi,Hapipah Mohd Ali
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811025669
Abstract: The asymmetric unit of the title compound, [ZnCl2(C11H17N3)], contains two independent pentacoordinate ZnII complex molecules. In each molecule, the metal atom is coordinated by an N,N′,N′′-tridenate Schiff base and two Cl atoms in a distorted square-pyramidal geometry. The two molecules differ little in their geometry, but more in their intermolecular interactions. In the crystal, adjacent molecules are connected via C—H...Cl interactions into a three-dimensional supramolecular structure. The network is supplemented by π–π interactions formed between the aromatic rings of pairs of the symmetry-related molecules [centroid–centroid distances = 3.6255 (10) and 3.7073 (10) ]. The crystal lattice contains void spaces with a size of 52 3.
Dichlorido{N,N-dimethyl-N′-[1-(2-pyridyl)ethylidene]ethane-1,2-diamine-κ3N,N′,N′′}copper(II)
Muhammad Saleh Salga,Hamid Khaledi,Hapipah Mohd Ali,Rustam Puteh
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810011712
Abstract: In the title compound, [CuCl2(C11H17N3)], the CuII ion is five-coordinated with a distorted square-pyramidal configuration. The three N atoms of the Schiff base ligand and one Cl atom are located in the basal plane, whereas the other Cl atom is apically positioned.
Bis{N-methyl-N′-[1-(pyridin-2-yl)ethylidene]ethane-1,2-diamine}zinc bis(perchlorate)
Chen-Yi Wang
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811026079
Abstract: The title mononuclear zinc(II) complex, [Zn(C10H15N3)2](ClO4)2, was obtained by the reaction of 2-acetylpyridine, N-methylethane-1,2-diamine and zinc perchlorate in methanol. The asymmetric unit of the complex contains two independent [Zn(C10H15N3)2]2+ cations and four perchlorate anions. The ZnII atom in each complex cation is six-coordinated by two pyridine N, two imine N and two amine N atoms from two N-methyl-N′-[1-(pyridin-2-yl)ethylidene]ethane-1,2-diamine Schiff base ligands in a distorted octahedral geometry. The pyridine rings in each of the complex cations are approximately perpendicular to each other, making dihedral angles of 88.4 (3) and 87.9 (3)°. The perchlorate anions are linked to the complex cations through N—H...O hydrogen bonds
Dichlorido{2-hydroxyimino-N′-[1-(2-pyridyl)ethylidene]propanohydrazide-κ3N,N′,O}zinc(II) hemihydrate  [cached]
Yurii S. Moroz,Tetyana Yu. Sliva,Kinga Kulon,Henryk Koz?owski
Acta Crystallographica Section E , 2008, DOI: 10.1107/s160053680706535x
Abstract: The title compound, [ZnCl2(C10H12N4O2)]·0.5H2O, was readily prepared by the reaction between ZnCl2 and 2-hydroxyimino-N′-[1-(2-pyridyl)ethylidene]propanohydrazide. The Zn atom has a distorted trigonal–bipyramidal geometry with two Cl atoms and one azomethine N atom in the equatorial plane and one pyridine N atom and one amide O atom in the axial positions. In the crystal structure, complex molecules are connected in pairs by N—H...Cl hydrogen bonds, formed between the amide NH of one molecule and the Cl atom of a neighboring one. Molecular pairs are connected by hydrogen bonds involving the uncoordinated water molecule, which lies on a twofold axis.
Dichlorido[N,N-diethyl-N′-(2-pyridylmethylene)ethane-1,2-diamine]mercury(II)  [cached]
Young-Inn Kim,Hoe-Joo Seo,Ji-Hoon Kim,You-Soon Lee
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810000103
Abstract: The Hg atom in the title compound, [HgCl2(C12H19N3)], adopts a distorted trigonal-bipyramidal geometry, being ligated by two Cl atoms and three N atoms of the N,N-diethyl-N′-(2-pyridylmethylene)ethane-1,2-diamine ligand. The dihedral angle between the HgN3 and HgCl2 least-squares planes is 88.6 (1)°. The Hg—N distances including the pyridine N and the ammonium N atom are about 0.20 longer than the Hg—N distance including the imino N atom.
Dichlorido{2-morpholino-N-[1-(2-pyridyl)ethylidene]ethanamine-κ3N,N′,N′′}cadmium  [cached]
Nurulazimah Ikmal Hisham,Nura Suleiman Gwaram,Hamid Khaledi,Hapipah Mohd Ali
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810043163
Abstract: In the title compound, [CdCl2(C13H19N3O)], the CdII ion is five-coordinate, with the N,N′,N′′-tridentate Schiff base ligand 2-morpholino-N-[1-(2-pyridyl)ethylidene]ethanamine and two Cl atoms in a distorted square-pyramidal geometry. In the crystal structure, C—H...Cl hydrogen-bonding interactions connect the molecules into a three-dimensional network.
Page 1 /100
Display every page Item


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