Filtreler
Filtreler
Bulunan: 48 Adet 0.074 sn
Dergi Adı : Acta Crystallographi ... ✕
Koleksiyon [7]
İlgili Araştırmacılar [7]
Ambargo Durumu [1]
Tam Metin [2]
Yazar [38]
Yayın Türü [1]
Yayın Yılı [11]
Yayın Dili [1]
Dergi Adı [1]
Yayıncı [1]
Konu Başlıkları [22]

2-(1H-Benzimidazol-1-yl)-1-(furan-2-yl)-ethanone O-2,4-dichloro-benzyl- oxime

Özel Güven Ö. | Erdogan T. | Aylak N. | Hökelek T.

In the title compound, C20H15Cl2N3O2, intra-molecular C - H?O hydrogen bonding causes the formation of a planar six-membered ring, which is also coplanar with the adjacent furan ring. The benzimidazole ring system is also planar and is oriented with respect to the coplanar ring system at a dihedral angle of 81.74 (10)°. The benzene ring is oriented with respect to the coplanar ring and benzimidazole ring systems at dihedral angles of 87.75 (15) and 84.24 (12)°, respectively. The oxime unit has an E configuration. © International Union of Crystallography 2007.

Makale 2007 Acta Crystallographica Section E: Structure Reports Online63 ( 10 ) 261 Görüntülenme

2-(1H-Benzotriazol-1-yl)-3-(2,6-dichlorophenyl)-1-phenylpropan-1-ol

Özel Güven O. | Çapanlar S. | Coles S.J. | Hökelek T.

The asymmetric unit of the title compound, C 21H 17Cl 2N 3O, contains two crystallographically independent molecules with similar conformations. The benzotriazole ring is oriented at dihedral angles of 30.61 (5) and 43.36 (5)°, respectively, to the phenyl and dichlorophenyl rings in one molecule, and 32.25 (5) and 41.04 (5)° in the other. The dihedral angles between the phenyl and dichlorophenyl rings are 66.38 (7) and 66.14 (6)° in the two molecules. An intramolecular O - H?N hydrogen bond links the benzotriazole ring and phenylpropanol unit in each molecule. In the crystal, weak intermolecul ...Daha fazlası

Makale 2011 Acta Crystallographica Section E: Structure Reports Online67 ( 9 ) 325 Görüntülenme

1-[2-(2,4-Dichloro-benz-yloxy)-2-(2-fur-yl)eth-yl]-1H-1,2,4-triazole

Özel Güven Ö. | Tahtaci H. | Coles S.J. | Hökelek T.

In the mol-ecule of the title compound, C15H13Cl 2N3O2, the triazole ring is oriented at dihedral angles of 14.8 (2) and 81.5 (1)° to the furan and dichloro-benzene rings, respectively. The dihedral angle between the dichloro-benzene and furan rings is 86.3 (2)°. An intra-molecular C- H?O hydrogen bond results in the formation of a planar [maximum deviation 0.012 (2) Å] five-membered ring, which is oriented at a dihedral angle of 0.90 (7)° with respect to the dichloro-benzene ring. There is an inter-molecular C- H?? contact between the methyl-ene group and the dichloro-benzene ring.

Makale 2009 Acta Crystallographica Section E: Structure Reports Online65 ( 11 ) 361 Görüntülenme

2-(1H-Benzimidazol-1-yl)-1-phenyl-ethanone

Özel Güven Ö. | Erdoan T. | Coles S.J. | Hökelek T.

In the mol-ecule of the title compound, C15H12N2O, the planar benzimidazole system is oriented at a dihedral angle of 80.43 (5)° with respect to the phenyl ring. In the crystal structure, non-classical inter-molecular C - H?N and C - H?O hydrogen bonds link the mol-ecules into layers parallel to the ab plane. © 2008.

Makale 2008 Acta Crystallographica Section E: Structure Reports Online64 ( 7 ) 342 Görüntülenme

1-(Furan-2-yl)-2-(2H-indazol-2-yl)ethanone

Güven O.O. | Türk G. | Adler P.D.F. | Coles S.J. | Hökelek T.

The asymmetric unit of the title compound, C13H 10N2O2, contains two crystallographically independent molecules (A and B). The indazole ring systems are approximately planar [maximum deviations = 0.0037(15) and-0.0198(15)Å], and their mean planes are oriented at 80.10(5) and 65.97(4)° with respect to the furan rings in molecules A and B, respectively. In the crystal, pairs of C-H..N hydrogen bonds link the B molecules, forming inversion dimers. These dimers are bridged by the A molecules via C-H..O hydrogen bonds, forming sheets parallel to (011). There are also C-H..? interactions present, an ...Daha fazlası

Makale 2014 Acta Crystallographica Section E: Structure Reports Online70 ( 4 ) 303 Görüntülenme

1-[2-(2,6-Dichlorobenzyloxy)-2-(2-furyl)ethyl]-1H-benzimidazole

Özel Güven Ö. | Erdogan T. | Coles S.J. | Hökelek T.

In the mol-ecule of the title compound, C20H16Cl2N2O2, the planar benzimidazole ring system is oriented with respect to the furan and dichloro-benzene rings at dihedral angles of 53.39 (6) and 31.04 (5)°, respectively. In the crystal structure, inter-molecular C - H?Cl hydrogen bonds link the mol-ecules into centrosymmetric R 2 2(8) dimers. These dimers are connected via a C - H?? contact between the benzimidazole and the furan rings, and ?-? contacts between the benz-imidazole and dichloro-benzene ring systems [centroid-centroid distances = 3.505 (1), 3.567 (1), 3.505 (1) and 3.567 (1) Å].

Makale 2008 Acta Crystallographica Section E: Structure Reports Online64 ( 8 ) 399 Görüntülenme

1-methoxyethyl-5-nitrobenzimidazole

Akkurt M. | Yildirim S.Ö. | Orhan E. | Küçükbay H. | Büyükgüngör O.

The title compound, C10H11N3O3, was synthesized by the reaction of 5-nitrobenzimidazole, 2-chloroethyl methyl ether and KOH in ethanol. The bond lengths and angles are unexceptional. © 2005 International Union of Crystallography Printed in Great Britain - all rights reserved.

Makale 2005 Acta Crystallographica Section E: Structure Reports Online61 ( 9 ) 239 Görüntülenme

(1RS,4RS)-1-Methoxyspiro[bicyclo[2.2.2]oct-5-ene-2,2'-[1', 3']dithiolane]

Gültekin Z. | Adams H. | Hökelek T.

The preparation of (1RS,4RS)1-Methoxyspiro[bicyclo[2.2.2]oct-5-ene-2, 2'-[1',3 ']dithiolane] compound by a literature method was shown. The compound consists of a five-membered dithiolane ring with a methoxybicyclooctene spiro-fused at the 2-position. It was observed that the S atom of the dithiolane ring have electron-releasing properties, but the O atom of the methoxy group was electron-withdrawing, thereby influencing the bond lengths and angles of the dithiolane ring. The structure determination of the compound was undertaken to understand the effects of the methoxybicyclo-octene system an ...Daha fazlası

Makale 2003 Acta Crystallographica Section E: Structure Reports Online59 ( 7 ) 219 Görüntülenme

1-[2-(4-Chlorobenzyloxy)-2-phenyl-ethyl]-1H-benzotriazole

Özel Güven Ö. | Bayraktar M. | Coles S.J. | Hökelek T.

The asymmetric unit of the title compound, C21H 18ClN3O, contains two crystallographically independent mol-ecules which differ slightly in the orientations of chloro-benz-yloxy units. In one of the mol-ecules, the phenyl and chloro-phenyl rings are oriented at dihedral angles of 38.09 (6) and 42.15 (6)°, respectively, with respect to the benzotriazole ring [43.23 (6) and 29.80 (6)° in the other mol-ecule]. The dihedral angle between the phenyl and chloro-phenyl rings is 77.63 (6)° in one of the mol-ecules and 72.97 (6)° in the other. The crystal structure is stabilized by weak C - H?? inter-ac ...Daha fazlası

Makale 2010 Acta Crystallographica Section E: Structure Reports Online66 ( 6 ) 283 Görüntülenme

2,9-Bis(methoxymethyl)-1,3,8,10-tetra-thiacyclotetradecane

Gültekin Z. | Bayrak H. | Frey W. | Hökelek T.

The title compound, C14H28O2S4, possesses a crystallographically imposed inversion centre and has two methine C atoms linked to methoxymethyl functional groups. It is in the exodentate conformation, with the four S atoms lying on the edges of the 'rectangular' macrocycle. The lone pairs of electrons on the S atoms point outwards from the macrocyclic cavity and the S atoms are bridged alternately by one-carbon and four-carbon moieties. © 2004 International Union of Crystallography Printed in Great Britain - all rights reserved.

Makale 2004 Acta Crystallographica Section E: Structure Reports Online60 ( 2 ) 290 Görüntülenme

1-[6-(6-Acetyl-pyridin-2-yl)pyridin-2-yl]ethanone

Dogan H.Z. | Sengul A. | Coles S.J.

In the title compound, C14H12N2O 2, the asymmetric unit comprises one half-mol-ecule with an inversion center between the pyridine rings. The rings are trans coplanar with the acetyl groups deviating slightly from the mean planes, making a dihedral angle of 4.63 (4)°. In the crystal, mol-ecules are linked by weak inter-molecular C - H?O hydrogen bonds, forming a supra-molecular sheet parallel to (100).

Makale 2011 Acta Crystallographica Section E: Structure Reports Online67 ( 6 ) 238 Görüntülenme

1-[2-(2,4-Dichlorobenzyloxy)-2-(furan-2-yl)ethyl]-1H-benzotriazole

Özel Güven Ö. | Bayraktar M. | Coles S.J. | Hökelek T.

In the title compound, C 19H 15Cl 2N 3O 2, the benzotriazole ring system is approximately planar [maximum deviation = 0.018(2) Å] and its mean plane is oriented at dihedral angles of 30.70(5) and 87.38(4)°, respectively, to the furan and benzene rings while the dihedral angle between furan and benzene rings is 74.46(6)°. In the crystal, weak C-H··· N hydrogen bonds link the molecules into chains along the b axis. ?-? stacking interactions between the parallel dichlorobenzene rings of adjacent molecules [centroid-centroid distance = 3.6847(9) Å] and weak C- H··· ? interactions are also observed ...Daha fazlası

Makale 2012 Acta Crystallographica Section E: Structure Reports Online68 ( 1 ) 590 Görüntülenme
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