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Search Results: 1 - 10 of 3528 matches for " Mehmet Akkurt "
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4-(4-Methoxybenzenesulfonamido)benzoic acid
Islam Ullah Khan,Ghulam Mustafa,Mehmet Akkurt
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811025098
Abstract: The asymmetric unit of the title compound, C14H13NO5S, contains two independent molecules in which the dihedral angles between the aromatic rings are 83.45 (11) and 86.65 (9)°. In the crystal, the independent molecules are connected by N—H...O and O—H...O hydrogen bonds, forming a double-chain structure along [401]. A weak π–π stacking interaction with a centroid–centroid distance of 3.7509 (13) and C—H...O hydrogen bonds are also observed.
4-Methyl-N-(4-methylphenyl)benzenesulfonamide
Islam Ullah Khan,Shahzad Sharif,Mehmet Akkurt,Arif Sajjad
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810008329
Abstract: In the title compound, C14H15NO2S, the two aromatic rings enclose a dihedral angle of 70.53 (10)°. A weak intramolecular C—H...O hydrogen bond generates an S(6) ring motif. The crystal structure features inversion-related dimers linked by pairs of N—H...O hydrogen bonds.
N-[4-(N-Cyclohexylsulfamoyl)phenyl]acetamide
Islam Ullah Khan,Mehmet Akkurt,Faiza Anwar,Shahzad Sharif
Acta Crystallographica Section E , 2010, DOI: 10.1107/s160053681000961x
Abstract: In the title compound, C14H20N2O3S, the cyclohexyl ring adopts a chair conformation: the four coplanar C atoms of this ring make a dihedral angle of 64.8 (2)° with the benzene ring. In the molecule, an intramolecular C—H...O contact generates an S(6) ring motif. In the crystal structure, molecules are linked via intermolecular N—H...O hydrogen bonds into two-dimensional layers propagating in (100).
(3R*,4R*)-1-(4-Chlorophenyl)-4-[2-hydroxy-3-(morpholinomethyl)phenyl]-3-phenoxyazetidin-2-one
Mehmet Akkurt,Aliasghar Jarrahpour,Hashem Sharghi,Seid Ali Torabi Badrabady
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811000675
Abstract: The β-lactam ring of the title compound, C26H25ClN2O4, is nearly planar (r.m.s. deviation = 0.025 ) and the morpholine ring adopts a chair conformation. The mean plane of the β-lactam ring makes dihedral angles of 21.6 (4), 84.4 (4) and 33.7 (4)° with the two benzene rings and the phenyl ring, respectively. The conformation of the title compound is stabilized by intramolecular C—H...O and O—H...N interactions. The crystal structure features C—H...π and aromatic π–π stacking interactions [centroid–centroid distances = 3.684 (4) and 3.883 (4) ].
1-(4-Methoxyphenyl)-4-(3-nitrophenyl)-3-phenoxyazetidin-2-one
Zeliha Baktır,Mehmet Akkurt,Aliasghar Jarrahpour,Roghaye Heiran
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811003382
Abstract: In the title compound, C22H18N2O5, the four-membered β-lactam ring is nearly planar, with a maximum deviation of 0.023 (2) for the N atom, and has long C—C distances of 1.525 (5) and 1.571 (5) . The mean plane of this group makes dihedral angles of 11.61 (19), 74.5 (2) and 72.3 (2)° with three aromatic rings. An intramolecular C—H...O hydrogen bond occurs. The packing of the molecules in the crystal structure is governed mainly by intermolecular C—H...O hydrogen-bonding and C—H...π stacking interactions. Furthermore, a π–π interaction [centroid–centroid distance = 3.6129 (19) ] helps to stabilize the crystal structure.
2-[(E)-(4-Methylphenyl)iminomethyl]-6-(morpholin-4-ylmethyl)phenol
Mehmet Akkurt,Sevim Türktekin,Aliasghar Jarrahpour,Hashem Sharghi
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536810052311
Abstract: In the title compound, C19H22N2O2, the morpholine ring adopts an almost perfect normal chair conformation with puckering parameters QT, θ and of 0.5642 (18) , 177.32 (17) and = 10 (4)°, respectively. The two benzene rings make a dihedral angle of 42.67 (8)° with each other. An intramolecular O—H...N hydrogen bond helps to stabilize the molecular conformation. Aromatic C—H...π interactions and π–π stacking interactions [centroid–centroid distance = 3.6155 (15) ] between the benzene rings contribute to the stabilization of the crystal structure.
2,4-Bis(4-fluorophenyl)-2,3-dihydro-1H-1,5-benzodiazepine
Zeliha Baktır,Mehmet Akkurt,S. Samshuddin,B. Narayana
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811015455
Abstract: In the title compound, C21H16F2N2, the seven-membered 1,4-diazepine ring of the benzodiazepine ring system adopts a distorted-boat conformation. The benzene ring of this system makes dihedral angles of 18.6 (2) and 78.8 (2)° with those of two fluorophenyl substituents. In the crystal, inversion dimers linked by two weak C—H...F hydrogen bonds generate R22(20) ring motifs. There are also weak N—H...π and C—H...π interactions.
3,5-Bis(4-methylphenyl)-1-phenyl-4,5-dihydro-1H-pyrazole
Ray J. Butcher,Mehmet Akkurt,S. Samshuddin,B. Narayana
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811011494
Abstract: In the title compound, C23H22N2, the dihedral angle between the methylbenzene groups is 77.62 (6)°, and the dihedral angle between the envelope-shaped pyrazole ring [in which one C atom displaced by 0.109 (1) from the mean plane of the other four atoms] and the phenyl ring is 17.57 (7)°. The dihedral angles between the phenyl ring and the two methylbenzene rings are 13.24 (6) and 81.02 (7)°. In the crystal, weak C—H...π interactions link the molecules.
5-Chloro-N-(4,5-dihydro-1H-imidazol-2-yl)-2,1,3-benzothiadiazol-4-amine (tizanidine)
Peter John,Islam Ullah Khan,Mehmet Akkurt,Muhammad Shahid Ramzan
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811008348
Abstract: There are two independent molecules (A and B) with similar conformations in the asymmetric unit of the title compound, C9H8ClN5S. The benzothiadiazole ring systems of both molecules are essentially planar [maximum deviation = 0.021 (2) in molecule A and 0.022 (1) in molecule B] and make dihedral angles of 68.78 (9) and 54.39 (8)°, respectively, with the mean planes of their 4,5-dihydro-1H-imidazole rings. An intramolecular N—H...Cl hydrogen bond occurs in molecule B. In the crystal, both molecules form centrosymmetric dimers through π-stacking of their benzothiadiazole rings, with interplanar distances of 3.3174 (7) and 3.2943 (6) . These dimers are further linked via pairs of N—H...N hydrogen bonds with the dihydroimidazole rings as the hydrogen-bonding donors and one of the benzothiadiazole N atoms as the acceptors, generating R22(16) ring motifs. The A2 and B2 dimers in turn form additional N—H...N hydrogen bonds with the secondary amine as the H-atom donor and the dihydroimidazole N atom as the acceptor. These R22(8)-type interactions connect the A2 and B2 dimers with each other, forming infinite chains along [1overline{1}1].
3,5-Bis(4-methoxyphenyl)-1-phenyl-4,5-dihydro-1H-pyrazole
Zeliha Baktır,Mehmet Akkurt,S. Samshuddin,B. Narayana
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811000687
Abstract: In the title compound, C23H22N2O2, the central pyrazole ring is nearly planar (r.m.s. deviation = 0.046 ) and it makes a dihedral angle of 18.5 (2)° with the phenyl ring. The dihedral angles between the phenyl and the two methoxy-substituted phenyl rings are 26.2 (2) and 80.6 (2)°. The crystal structure is stabilized by C—H...π stacking interactions and weak π–π interactions [centriod–centroid distance = 3.891 (2) ].
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