Zobrazeno 1 - 10
of 420
pro vyhledávání: '"offset π–π interactions"'
Autor:
Dilovan S. Cati, Helen Stoeckli-Evans
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 75, Iss 6, Pp 755-761 (2019)
The title tridentate ligand, C14H10N4O, N-(quinolin-8-yl)pyrazine-2-carboxamide (HL1), crystallizes with three independent molecules (A, B and C) in the asymmetric unit. All three molecules are relatively planar (r.m.s. deviations are 0.068, 0.055 an
Externí odkaz:
https://doaj.org/article/08fabf78e97d41b684218dfc4d3097f0
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 75, Iss 6, Pp 732-737 (2019)
The crystal structures of an intermediate, C10H9ClN4O, 3-[(6-chloro-7H-purin-7-yl)methyl]cyclobutan-1-one (I), and two N-7 and N-9 regioisomeric oxetanocin nucleoside analogs, C10H13ClN4O, 3-[(6-chloro-8,9-dihydro-7H-purin-7-yl)methyl]cyclobutan-1-ol
Externí odkaz:
https://doaj.org/article/5a7811ee3ca94a4c9da7851a2c79aef9
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 75, Iss 4, Pp 482-488 (2019)
The title compounds, 2-(4-{2-[(2-oxo-2H-chromen-4-yl)oxy]acetyl}piperazin-1-yl)acetamide, C17H19N3O5, (I), and N-(2,4-dimethoxybenzyl)-2-[(2-oxo-2H-chromen-4-yl)oxy]acetamide, C20H19NO6, (II), are new coumarin derivatives. In compound (I), the six-me
Externí odkaz:
https://doaj.org/article/ea4ef744f94e487ca223cce64506c551
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 76, Iss 7, Pp 1107-1112 (2020)
In the molecule of 6,8-dimethoxy-3-methyl-1H-isochromen-1-one, C12H12O4, (I), the two methoxy groups are directed anti with respect to each other. In the molecule of the brominated derivative, 5-bromo-6,8-dimethoxy-3-methyl-1H-isochromen-1-one, that
Externí odkaz:
https://doaj.org/article/0b4faec8152b4319912d3c20ec7d5f5a
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 76, Iss 3, Pp 404-409 (2020)
The two new tetrakis-substituted pyrazines, 1,1′,1′′,1′′′-(pyrazine-2,3,5,6-tetrayl) tetrakis(N,N-dimethylmethanamine), C16H32N6, (I) and N,N′,N′′,N′′′-[pyrazine-2,3,5,6-tetrayltetrakis(methylene)]tetrakis(N-methylaniline), C3
Externí odkaz:
https://doaj.org/article/e2dabbd699b841759d39a722593e352f
Autor:
Dilovan S. Cati, Helen Stoeckli-Evans
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 76, Iss 3, Pp 332-338 (2020)
The title pyrazine dicarboxamide ligand, N2,N3-bis(quinolin-8-yl)pyrazine-2,3-dicarboxamide (H2L1), C24H16N6O2, has a twisted conformation with the outer quinoline groups being inclined to the central pyrazine ring by 9.00 (6) and 78.67 (5)°, and by
Externí odkaz:
https://doaj.org/article/8efcbc1e097a4acead96e507a5e8882e
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 75, Iss 12, Pp 1947-1951 (2019)
The title triclinic polymorph (Form I) of 1,4-bis([2,2′:6′,2′′-terpyridin]-4′-yl)benzene, C36H24N6, was formed in the presence of the Lewis acid yttrium trichloride in an attempt to obtain a coordination compound. The crystal structure of t
Externí odkaz:
https://doaj.org/article/240a49ec953b4e9a8c344612a1c5ecf4
Autor:
S. N. Sheshadri, C. S. Chidan Kumar, S. Naveen, M. K. Veeraiah, Kakarla Raghava Reddy, Ismail Warad
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 75, Iss 11, Pp 1719-1723 (2019)
The title compound, C15H11NO5, is relatively planar, with the planes of the two aromatic rings being inclined to each other by 3.09 (5)°. In the crystal, molecules are linked by a pair of C—H...O hydrogen bonds, forming inversion dimers, which enc
Externí odkaz:
https://doaj.org/article/0e5aeb7eda5449719ab6ba0bae0da944
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 75, Iss 8, Pp 1117-1122 (2019)
The title compounds, 8-amino-6-methyl-3,4-diphenyl-1H-isochromen-1-one, C22H17NO2, (I), and 8-amino-3,4-diethyl-6-methyl-1H-isochromen-1-one, C14H17NO2, (II), are new isocoumarin derivatives in which the isochromene ring systems are planar. Compound
Externí odkaz:
https://doaj.org/article/17de71ea96894cf591cdb3da0c2ffaf1
Autor:
Younos Bouzian, Khalid Karrouchi, El Hassane Anouar, Rachid Bouhfid, Suhana Arshad, El Mokhtar Essassi
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 75, Iss 6, Pp 912-916 (2019)
In the title quinoline derivative, C14H14ClNO3, there is an intramolecular C—H...O hydrogen bond forming an S(6) graph-set motif. The molecule is essentially planar with the mean plane of the ethyl acetate group making a dihedral angle of 5.02 (3)
Externí odkaz:
https://doaj.org/article/af4155a207d144e597f17213bb6d146a