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
2-[(4-Methoxy-2-nitrophenyl)iminomethyl]phenol  [cached]
Aliakbar Dehno Khalaji,Mahsa Nikookar,Karla Fejfarová,Michal Dušek
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812031212
Abstract: The crystal structure of the title compound, C14H12N2O4, contains four crystallographically independent molecules in the asymmetric unit. All the molecules have similar conformations; the dihedral angles between the aromatic rings are 33.1 (1), 33.76 (9), 31.41 (9) and 32.56 (10)°. Intramolecular O—H...N hydrogen bonds form S(6) ring motifs in each molecule. In the crystal, there are two pairs of pseudo-inversion-related molecules. Along the c axis, molecules are stacked with π–π interactions between the 2-hydroxyphenyl and 4-methoxy-2-nitrophenyl rings [centroid–centroid distances = 3.5441 (12)–3.7698 (12) ].
3-Methoxy-2-[(E)-(4-methoxyphenyl)iminomethyl]phenol  [cached]
Gonca Özdemir Tari,Şamil Işık,Ramazan Özkan,Ayşen Alaman Ağar
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811000596
Abstract: The title compound, C15H15NO3, adopts the enol–imine tautomeric form. The two rings are twisted with respect to each other, making a dihedral angle of 44.08 (5)°. The 3-methoxy-2-[(E)-(4-methoxyphenyl)-iminomethyl]phenol unit is almost planar, the largest deviation from the mean plane being 0.047 (2) . Such a planar conformation might be related to the occurrence of an intramolecular O—H...N hydrogen bond. In the crystal, intermolecular C—H...O hydrogen bonds link the molecules into sheets parallel to (010). These sheets are interconnected by weak C—H...π interactions.
Bis{2-[(2-pyridyl)iminomethyl]phenolato}copper(II)
Jinling Miao,Zhitong Zhao,Hongwei Chen,Daqi Wang
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809026051
Abstract: In the title compound, [Cu(C12H9N2O)2], the CuII atom lies on a crystallographic inversion center and has a nearly square-planar geometry. The CuII center coordinates to the phenolic O and azomethine N atoms of the two symmetry-related 2-[(2-pyridyl)iminomethyl]phenolate ligands. The pyridyl N atoms do not coordinate to the CuII atom but participate in intramolecular C—H...N hydrogen bonding. π–π stacking between the benzene rings and between the pyridyl rings [centroid–centroid distances 3.8142 (5) and 3.8142 (5) , respectively] links the molecules into a chain propagating parallel to [100].
2-Methoxy-4-[(4-methylpiperazin-1-yl)iminomethyl]phenol  [cached]
Li-Na Zhou,Long Yan,Hui-Liang Zhou,Qing-Feng Yang
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536810051135
Abstract: The title compound, C13H19N3O2, was obtained by the direct solvent-free reaction of 4-hydroxy-3-methoxybenzaldehyde with 1-amino-4-methylpiperazine. The piperazine ring adopts a chair conformation. In the crystal, strong intermolecular O—H...N and weak intermolecular C—H...O and C—H...N hydrogen bonds help to establish the packing.
(E)-2-Methoxy-6-[(5-methylisoxazol-3-yl)iminomethyl]phenol  [cached]
Ren-Gao Zhao,Jie Lu,Ji-Kun Li
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808001888
Abstract: In the title molecule, C12H12N2O3, the benzene and isoxazole rings form a dihedral angle of 5.9 (6)°. The hydroxy group is involved in an intramolecular O—H...N hydrogen bond [O...N = 2.616 (5) ], resulting in approximate planarity of the molecular skeleton. In the crystal structure, molecules related by translation along the c axis are stacked into columns, the shortest intermolecular C...C distance being 3.298 (6) .
Bis(6-methoxy-2-{[tris(hydroxymethyl)methyl-κO]iminomethyl}phenolato-κ2N,O1)nickel(II) dihydrate  [cached]
Tian Zhou,Ru-Jin Zhou,Zhe An
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809022028
Abstract: In the title compound, [Ni(C12H16NO5)2]·2H2O, the NiII atom is coordinated by four O atoms and two N atoms from the two 6-methoxy-2-{[tris(hydroxymethyl)methyl]iminomethyl}phenolate ligands in a distorted octahedral coordination geometry. O—H...O hydrogen bonds link the complexes and uncoordinated water molecules into two-dimensional networks parallel to (001).
2-[(E)-(2,3-Dimethylphenyl)iminomethyl]phenol  [cached]
M. Nawaz Tahir,Muhammad Ilyas Tariq,Shahbaz Ahmad,Muhammad Sarfraz
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810033398
Abstract: In the title compound, C15H15NO, the almost planar 2,3-dimethylaniline unit and the salicylaldehyde group (r.m.s. deviations of 0.0156 and 0.0109 , respectively) are oriented at a dihedral angle of 43.69 (9)° with respect to each other. An S(6) ring motif is formed due to intramolecular O—H...N hydrogen bonding. In the crystal, C—H...π interactions occur between the 2,3-dimethylaniline unit and the salicylaldehyde group, where the CH is from the o-methyl group.
Methanol{2-methoxy-6-[(2-oxidopropyl)iminomethyl]phenolato}dioxidomolybdenum(VI)
Samira Saeednia,Iran Sheikhshoaie,Helen Stoeckli-Evans
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809047485
Abstract: In the structure of the title compound, [Mo(C11H13NO3)O2(CH3OH)], the MoVI ion is octahedrally coordinated by two oxide O atoms, the N atom and two deprotonated OH groups of the tridentate Schiff base ligand 2-methoxy-6-[(2-oxidopropyl)iminomethyl]phenolate and by a methanol O atom. In the crystal structure, two complexes are linked via O—H...O hydrogen bonds, yielding a centrosymmetric arrangement involving the methanol hydroxy group and one of the ligand O atoms coordinated to the MoVI ion.
Bis{(E)-2-methoxy-6-[(4-methylphenyl)iminomethyl]phenolato}zinc(II)
Hui-Duo Xian,Jian-Feng Liu,Hua-Qiong Li,Guo-Liang Zhao
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808033102
Abstract: The title compound, [Zn(C15H14NO2)2], contains a four-coordinate Zn atom located on a twofold rotation axis that exhibits a distorted tetrahedral geometry by two phenolate O atoms and two azomethine N atoms of the Schiff base 2-methoxy-6-[(4-methylphenyl)iminomethyl]phenolate ligands.
A chiral photochromic Schiff base: (R)-4-methoxy-2-[(1-phenylethyl)iminomethyl]phenol
Yukie Miura,Yoshikazu Aritake,Takashiro Akitsu
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809035557
Abstract: The title chiral photochromic Schiff base compound, C16H17NO2, was synthesized from (R)-1-phenylethylamine and 5-methoxysalicylaldehyde. The molecule of the title compound exists in the phenol–imine tautomeric form. The dihedral angle between the two aromatic rings is 62.61 (11)°. An intramolecular O—H...N hydrogen bond with an O...N distance of 2.589 (2) is observed. The crystal packing is stabilized by C—H...π interactions involving the aromatic ring.
Page 1 /100
Display every page Item


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