scholarly journals Crystal structure of (E)-3-(2,4-dimethoxyphenyl)-1-(1-hydroxynaphthalen-2-yl)prop-2-en-1-one

2014 ◽  
Vol 70 (9) ◽  
pp. o1034-o1035 ◽  
Author(s):  
Dongsoo Koh
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Ring System ◽  
Naphthalene Ring ◽  
Torsion Angles ◽  
Compound C ◽  
Methoxy Groups

In the title compound, C21H18O4, the C=C bond of the central enone group adopts anEconformation. The dihedral angle formed by the benzene ring and the naphthalene ring system is 6.60 (2)°. The methoxy groups on the benzene ring are essentially coplanar with the ring; the C—C—O—C torsion angles being 1.6 (2) and −177.1 (1)°. The hydroxy group attached to the naphthalene ring is involved in an intramolecular O—H...O hydrogen bond. The relative conformation of the two double bonds in the enone group iss-cisoid. In the crystal, weak C—H...O hydrogen bonds link the molecules into chains propagating along [010].

scholarly journals The crystal structure of 2-[5-(dimethylamino)naphthalene-1-sulfonamido]phenyl 5-(dimethylamino)naphthalene-1-sulfonate

2015 ◽  
Vol 71 (10) ◽  
pp. o721-o722 ◽  
Author(s):  
Kittipong Chainok ◽  
Tanwawan Duangthongyou ◽  
Thawatchai Tuntulani ◽  
Apinya Chuenka ◽  
Boontana Wannalerse
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Naphthalene Ring ◽  
Twofold Axis ◽  
Compound C

The complete molecule of the title compound, C30H29N3O5S2, is generated by a crystallographic twofold axis: the O atom and NH group attached to the central benzene ring are statistically disordered. The dihedral angle between the naphthalene ring system and the central benzene ring is 52.99 (6)°, while the pendant naphthalene ring systems subtend a dihedral angle of 68.17 (4)°. An intramolecular C—H...O hydrogen bond closes anS(6) ring. In the crystal, the molecules are linked by weak C—H...O hydrogen bonds.

scholarly journals Crystal structure ofN-(1-allyl-3-chloro-4-ethoxy-1H-indazol-5-yl)-4-methoxybenzenesulfonamide

2014 ◽  
Vol 70 (9) ◽  
pp. o1029-o1030
Author(s):  
Hakima Chicha ◽  
El Mostapha Rakib ◽  
Latifa Bouissane ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Three Dimensional ◽  
Ring System ◽  
Torsion Angles ◽  
Compound C ◽  
Dimensional Network

In the title compound, C19H20ClN3O4S, the benzene ring is inclined to the indazole ring system (r.m.s. deviation = 0.014 Å) by 65.07 (8)°. The allyl and ethoxy groups are almost normal to the indazole ring, as indicated by the respective torsion angles [N—N—C—C = 111.6 (2) and C—C—O—C = −88.1 (2)°]. In the crystal, molecules are connected by N—H...N hydrogen bonds, forming helical chains propagating along [010]. The chains are linked by C—H...O hydrogen bonds, forming a three-dimensional network.

scholarly journals 1-{(Z)-[2-Methoxy-5-(trifluoromethyl)anilino]methylidene}naphthalen-2(1H)-one

2013 ◽  
Vol 69 (2) ◽  
pp. o163-o163
Author(s):  
Hakan Kargılı ◽  
Ayşen Alaman Ağar ◽  
Gökhan Alpaslan ◽  
Orhan Büyükgüngör ◽  
Ahmet Erdönmez
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Tautomeric Form ◽  
Ring System ◽  
Trifluoromethyl Group ◽  
Naphthalene Ring ◽  
Compound C

The title compound, C19H14F3NO2, crystallizes in the keto–amine tautomeric form, with a strong intramolecular N—H...O hydrogen bond. The molecule is almost planar; the dihedral angle between the naphthalene ring system and the benzene ring is 4.60 (7)°. In the crystal, molecules are linked into chains along thecaxis by C—H...O hydrogen bonds. The F atoms of the trifluoromethyl group are disordered over two positions with refined site occupancies of 0.668 (9) and 0.332 (9).

scholarly journals Crystal structure of (4Z)-4-[(2E)-1-hydroxy-3-(naphthalen-2-yl)prop-2-en-1-ylidene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one

2015 ◽  
Vol 71 (6) ◽  
pp. o381-o381
Author(s):  
Muhammad Salim ◽  
Munawar Ali Munawar ◽  
Muhammad Nawaz Tahir ◽  
Muhammad Shahid ◽  
Khizar Iqbal Malik
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Pyrazole Ring ◽  
Ring System ◽  
Dihedral Angles ◽  
Stacking Interactions ◽  
Naphthalene Ring ◽  
Compound C

In the title compound, C23H18N2O2, the pyrazole ring subtends dihedral angles of 2.01 (13) and 1.55 (10)° with the pendant benzene ring and the naphthalene ring system, respectively. The molecule is almost planar (r.m.s. deviation for the 27 non-H atoms = 0.025 Å) and intramolecular O—H...O and C—H...O hydrogen bonds both closeS(6) loops. In the crystal, very weak aromatic π–π stacking interactions between the benzene and the pyrazole rings, with centroid–centroid distances of 3.8913 (14) and 3.9285 (15) Å, are observed.

scholarly journals Crystal structure of 9-(3-bromo-5-chloro-2-hydroxyphenyl)-10-(2-hydroxyethyl)-3,3,6,6-tetramethyl-3,4,6,7,9,10-hexahydroacridine-1,8(2H,5H)-dione

2014 ◽  
Vol 70 (8) ◽  
pp. 44-47 ◽  
Author(s):  
Antar A. Abdelhamid ◽  
Shaaban K. Mohamed ◽  
Jim Simpson
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Ring System ◽  
Carbonyl Groups ◽  
Axis Direction ◽  
Compound C ◽  
Dihydropyridine Ring

The title compound C25H29BrClNO4, comprises a 3,3,6,6-tetramethyltetrahydroacridine-1,8-dione ring system that carries a hydroxyethyl substituent on the acridine N atom and a 3-bromo-5-chloro-2-hydroxyphenyl ring on the central methine C atom of the dihydropyridine ring. The benzene ring is inclined to the acridine ring system at an angle of 89.84 (6)° and this conformation is stabilized by an intramolecular O—H...O hydrogen bond between the hydroxy substituent on the benzene ring and one of the carbonyl groups of the acridinedione unit. In the crystal, O—H...O, C—H...O and C—H...Br hydrogen bonds combine to stack molecules in interconnected columns propagating along thea-axis direction.

scholarly journals Crystal structure of 1,2-bis(4-fluorophenyl)-1-hydroxy-2,3,8-trimethoxyacenaphthene: formation of a five-membered intramolecular O—H...O hydrogen-bonded ring

2021 ◽  
Vol 77 (2) ◽  
pp. 175-179
Author(s):  
Hiroaki Iitsuka ◽  
Kun Li ◽  
Miyuki Kobayashi ◽  
Kikuko Iida ◽  
Noriyuki Yonezawa ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Ring System ◽  
Dihedral Angles ◽  
Naphthalene Ring ◽  
Compound C ◽  
Methoxy Groups ◽  
Dimeric Aggregates ◽  
Hydrogen Bonded

The structure of the title compound, C27H22F2O4, at 193 K has triclinic (P\overline{1}) symmetry. The hydroxy and methoxy groups at the 1,2-positions of the acenaphthene core display a cis configuration. Both substituents are involved in the formation of a five-membered intramolecular O—H...O hydrogen-bonded ring. The 4-fluorophenyl rings make dihedral angles of 87.02 (7) and 51.86 (8)° with the naphthalene ring system. In the crystal, a pair of non-classical C—H...O hydrogen bonds forms centrosymmetric dimeric structures. The dimeric aggregates are linked in the ac plane through non-classical C—H...F hydrogen bonds and C—H...π interactions.

scholarly journals Crystal structure of 2-(4-fluoro-3-methylphenyl)-5-{[(naphthalen-1-yl)oxy]methyl}-1,3,4-oxadiazole

2015 ◽  
Vol 71 (4) ◽  
pp. o229-o230
Author(s):  
Muniyappan Govindhan ◽  
Kathavarayan Subramanian ◽  
Vijayan Viswanathan ◽  
Devadasan Velmurugan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Ring System ◽  
Dihedral Angles ◽  
Naphthalene Ring ◽  
Π Interactions ◽  
Compound C ◽  
Planar Conformation

The title compound, C20H15FN2O2, adopts an almost planar conformation. The oxadiazole ring makes dihedral angles of 13.90 (1) and 7.93 (1)° with the naphthalene ring system and benzene ring, respectively, while the naphthalene ring system and benzene ring are inclined to one another by 6.35 (1)°. In the crystal, adjacent molecules are linkedviaC—H...N hydrogen bonds, forming chains propagating along [100]. There are also π–π interactions present [intercentroid distances = 3.5754 (9) and 3.7191 (12) Å], linking the chains to form ribbons lying parallel to (011).

scholarly journals Crystal structure of 2-(2,3-dimethoxynaphthalen-1-yl)-3-hydroxy-6-methoxy-4H-chromen-4-one

2015 ◽  
Vol 71 (11) ◽  
pp. o842-o843 ◽  
Author(s):  
Seunghyun Ahn ◽  
Yoongho Lim ◽  
Dongsoo Koh
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Ring System ◽  
Naphthalene Ring ◽  
Compound C ◽  
Ring Motif

In the title compound, C22H18O6, the dimethoxy-substituted naphthalene ring system is twisted relative to the 4H-chromenon skeleton by 88.96 (3)°. The two methoxy substituents are tilted from the naphthalene ring system by 1.4 (4) and 113.0 (2)°, respectively. An intramolecular O—H...O hydrogen bond closes anS(5) ring motif. In the crystal, pairs of O—H...O hydrogen bonds form inversion dimers withR22(10) loops and C—H...O interactions connect the dimers into [010] chains.

scholarly journals Crystal structure of 1-{(E)-[(3,4-dichlorophenyl)imino]methyl}naphthalen-2-ol

2015 ◽  
Vol 71 (9) ◽  
pp. o696-o696
Author(s):  
Muhammad Nawaz Tahir ◽  
Muhammad Anwar-ul-Haq ◽  
Hazoor Ahmad Shad
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Torsion Angle ◽  
Title Compound ◽  
Ring System ◽  
Naphthalene Ring ◽  
Compound C

In the title compound, C17H11Cl2NO, the dihedral angle between the planes of the naphthalene ring system and the benzene ring is 28.88 (11)°. The main twist in the molecule occurs about the N—Cb(b = benzene ring) bond, as indicated by the C=N—Cb—Cbtorsion angle of 31.0 (4)°. An intramolecular O—H...N hydrogen bond closes anS(6) ring. In the crystal, inversion dimers linked by pairs of very weak C—H...O interactions generateR22(16) loops.

scholarly journals Crystal structure of (2E)-1-(4-hydroxy-1-methyl-2-oxo-1,2-dihydroquinolin-3-yl)-3-(4-hydroxy-3-methoxyphenyl)prop-2-en-1-one

2015 ◽  
Vol 71 (4) ◽  
pp. 424-426
Author(s):  
Peter Mangwala Kimpende ◽  
Ngoc Thanh Nguyen ◽  
Minh Thao Nguyen ◽  
Quoc Trung Vu ◽  
Luc Van Meervelt
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Compound C ◽  
Planar Conformation ◽  
The Mean

In the title compound, C20H17NO5, the dihedral angle between the mean plane of the dihydroquinoline ring system (r.m.s. deviation = 0.003 Å) and the benzene ring is 1.83 (11)°. The almost planar conformation is a consequence of an intramolecular O—H...O hydrogen bond and theEconfiguration about the central C=C bond. In the crystal structure, O—H...O hydrogen bonds generate chains of molecules along the [10-1] direction. These chains are linkedviaπ–π interactions [inter-centroid distances are in the range 3.6410 (16)–3.8663 (17) Å].

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