scholarly journals Crystal structure of 2-amino-4-phenyl-4H-benzo[h]chromene-3-carbonitrile

2015 ◽  
Vol 71 (7) ◽  
pp. o516-o517
Author(s):  
Shaaban K. Mohamed ◽  
Peter N. Horton ◽  
Mehmet Akkurt ◽  
Sabry H. H. Younes ◽  
Mustafa R. Albayati
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Phenyl Ring ◽  
Ring System ◽  
Boat Conformation ◽  
Naphthalene Ring ◽  
Pyran Ring ◽  
Compound C ◽  
Supramolecular Chains ◽  
Ring Motif

In the title compound, C20H14N2O, the plane of the phenyl ring is almost normal to that of the naphthalene ring system, forming a dihedral angle of 83.15 (8)°. The 4H-pyran ring fused with the naphthalene ring system has a flattened boat conformation. In the crystal, molecules are linked by pairs of N—H...N hydrogen bonds, forming inversion dimers with anR22(12) ring motif. The dimers are connected by C—H...π interactions, forming supramolecular chains along [010].

scholarly journals Crystal structure of 3-amino-1-(4-hydroxyphenyl)-1H-benzo[f]chromene-2-carbonitrile

2015 ◽  
Vol 71 (8) ◽  
pp. o536-o537
Author(s):  
Mehmet Akkurt ◽  
Peter N. Horton ◽  
Sabry H. H. Younes ◽  
Shaaban K. Mohamed ◽  
Mustafa R. Albayati
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Boat Conformation ◽  
Naphthalene Ring ◽  
Pyran Ring ◽  
Compound C ◽  
The Mean

In the title compound, C20H14N2O2, the hydroxybenzene ring is almost perpendicular to the mean plane of the naphthalene ring system, making a dihedral angle of 85.56 (4)°. The 4H-pyran ring fused with the naphthalene ring system has a flattened boat conformation. In the crystal, O—H...N and N—H...O hydrogen bonds link the molecules into a supramolecular layer in thebcplane; N—H...π interactions also contribute to this arrangement. The layers are linked by weak by C—H...π and π–π [inter-centroid separation = 3.8713 (7) Å] interactions.

scholarly journals Crystal structure of 3-amino-1-(4-chlorophenyl)-1H-benzo[f]chromene-2-carbonitrile

2015 ◽  
Vol 71 (7) ◽  
pp. o481-o482 ◽  
Author(s):  
Mehmet Akkurt ◽  
Peter N. Horton ◽  
Shaaban K. Mohamed ◽  
Sabry H. H. Younes ◽  
Mustafa R. Albayati
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Crystal Packing ◽  
Ring System ◽  
Boat Conformation ◽  
Naphthalene Ring ◽  
Pyran Ring ◽  
Compound C ◽  
The Mean

In the title compound, C20H13ClN2O, the chlorobenzene ring is almost perpendicular to the mean plane of the naphthalene ring system, making a dihedral angle of 81.26 (8)°. The 4H-pyran ring fused with the naphthalene ring system has a flattened boat conformation. In the crystal, N—H...N hydrogen bonds generate chains along theb-axis direction. Further N—H...N hydrogen bonds link these chains into sheets parallel to (010). The crystal packing also features C—H...π interactions. The crystal studied was an inversion twin with a 0.557 (16):0.443 (16) domain ratio.

scholarly journals Crystal structure of 3-[4-(benzyloxy)phenyl]-2,3-dihydro-1H-benzo[f]chromen-1-one

2014 ◽  
Vol 70 (10) ◽  
pp. o1116-o1117 ◽  
Author(s):  
R. Vasanthi ◽  
D. Reuben Jonathan ◽  
K. S. Ezhilarasi ◽  
S. Sathya ◽  
G. Usha
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Chair Conformation ◽  
Ring System ◽  
Dihedral Angles ◽  
Naphthalene Ring ◽  
Pyran Ring ◽  
Compound C ◽  
Phenyl Rings ◽  
Graph Set

In the title compound, C26H20O3, the pyran ring has a distorted half-chair conformation and its mean plane is inclined to the naphthalene ring system, to which it is fused, by 10.79 (9)°. The dihedral angles between the napthalene unit and the benzene and phenyl rings are 54.39 (9) and 52.65 (12)°, respectively, while the benzene and phenyl rings are inclined to one another by 74.80 (14)°. There is a short C—H...O contact in the chromen-1-one unit. In the crystal, molecules are linked by two pairs of C—H...O hydrogen bonds, forming inversion dimers described by graph set motifsR22(8) andR22(10), giving rise to chains running parallel to (101). The chains are linkedviaC—H...π interactions, forming sheets lying parallel to (010).

scholarly journals Crystal structure of ethyl 6-bromo-2-[(E)-2-phenylethenyl]quinoline-4-carboxylate

2015 ◽  
Vol 71 (2) ◽  
pp. o121-o121 ◽  
Author(s):  
T. O. Shrungesh Kumar ◽  
S. Naveen ◽  
M. N. Kumara ◽  
K. M. Mahadevan ◽  
N. K. Lokanath
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
Ring System ◽  
Ethynyl Group ◽  
Bond Forming ◽  
Compound C ◽  
Ring Motif

In the title compound, C20H16BrNO2, the dihedral angle between the quinolone ring system mean plane (r.m.s. deviation = 0.018 Å) and the phenyl ring bridged by the ethynyl group, is 25.44 (14)°. There is an intramolecular C—H...O hydrogen bond forming anS(6) ring motif. In the crystal, molecules are linkedviaC—H...O hydrogen bonds forming chains propagating along theb-axis direction.

scholarly journals Crystal structure of 3-amino-1-(4-methoxyphenyl)-1H-benzo[f]chromene-2-carbonitrile

2015 ◽  
Vol 71 (7) ◽  
pp. o468-o469
Author(s):  
Shaaban K. Mohamed ◽  
Peter N. Horton ◽  
Mehmet Akkurt ◽  
Sabry H. H. Younes ◽  
Mustafa R. Albayati
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Crystal Packing ◽  
Ring System ◽  
Maximum Deviation ◽  
Naphthalene Ring ◽  
Pyran Ring ◽  
Compound C ◽  
The Mean

In the title compound, C21H16N2O2, the methoxybenzene ring is almost perpendicular to the mean plane of the naphthalene ring system, making a dihedral angle of 83.62 (5)°. The 4H-pyran ring fused with the naphthalene ring system is almost planar [maximum deviation = 0.033 (1) Å]. In the crystal, molecules are linked into inversion dimers by pairs of N—H...N hydrogen bonds. N—H...O hydrogen bonds connect the dimers, forming a helical supramolecular chain along thea-axis direction. The crystal packing also features C—H...π interactions.

scholarly journals Diethyl 2,6-dimethyl-4-(naphthalen-1-yl)-1,4-dihydropyridine-3,5-dicarboxylate

IUCrData ◽  
2016 ◽  
Vol 1 (5) ◽  
Author(s):  
N. L. Prasad ◽  
Noor Shahina Begum
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyridine Ring ◽  
Ring System ◽  
Zigzag Chain ◽  
Boat Conformation ◽  
Naphthalene Ring ◽  
Compound C ◽  
Dihydropyridine Ring ◽  
Ring Motif

In the title compound, C23H25NO4, the 1,4-dihydropyridine ring adopts a flattened boat conformation. The naphthalene ring system forms a dihedral angle of 88.59 (6)° with the pyridine ring. In the crystal, N—H...O and C—H...O hydrogen bonds generate anR12(6) ring motif and result in a zigzag chain along thebaxis. Additional C—H...O hydrogen bonds form infinite chains along thec-axis direction.

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 Methyl 6-ethoxy-3-phenyl-3a,4-dihydro-3H-chromeno[4,3-c]isoxazole-3a-carboxylate

2013 ◽  
Vol 69 (2) ◽  
pp. o180-o180
Author(s):  
G. Suresh ◽  
J. Srinivasan ◽  
M. Bakthadoss ◽  
S. Aravindhan
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Phenyl Ring ◽  
Chair Conformation ◽  
Ring System ◽  
Pyran Ring ◽  
Isoxazole Ring ◽  
Compound C ◽  
The Mean ◽  
Ring Motif

In the title compound, C20H19NO5, the dihedral angle between the mean plane of the pyran ring (which has a half-chair conformation) and the benzene ring of the chromeno ring system is 7.21 (7)°. The dihedral angle between the mean plane of the chromeno ring system and the isoxazole ring is 21.78 (6)°, while the isoxazole ring forms a dihedral angle of 72.60 (8)° with the attached phenyl ring. In the crystal, molecules are linkedviapairs of C—H...O hydrogen bonds, forming inversion dimers with anR22(10) ring motif. These dimers are linkedviaC—H...N hydrogen bonds, forming chains along [001].

scholarly journals 9-O-Butylberberrubinium bromide

2009 ◽  
Vol 65 (6) ◽  
pp. o1370-o1370 ◽  
Author(s):  
Zhu Chen ◽  
Xue-Gang Li ◽  
Yong-Sheng Xie ◽  
Xiao-Li Ye
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Phenyl Ring ◽  
Crystal Packing ◽  
Ring System ◽  
Naphthalene Ring ◽  
Π Interactions ◽  
Compound C

In the title compound, C23H24NO4+·Br−, the butyl chain is disordered between two conformations; the occupancies refined to 0.735 (7) and 0.265 (7). The dihedral angle between the naphthalene ring system and the phenyl ring is 11.6 (2)°. In the crystal structure, the cations are packedviaπ–π interactions into stacks propagating in the [010] direction. Weak intermolecular C—H...O and C—H...Br hydrogen bonds contribute further to the crystal packing stability.

scholarly journals Crystal structure of 3-methoxy-2-[5-(naphthalen-1-yl)-4,5-dihydro-1H-pyrazol-3-yl]phenol

2015 ◽  
Vol 71 (11) ◽  
pp. o828-o829
Author(s):  
Dongsoo Koh
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Ring System ◽  
Naphthalene Ring ◽  
Π Interactions ◽  
Bond Forming ◽  
Compound C ◽  
Pyrazoline Ring ◽  
Ring Motif

In the title compound, C20H18N2O2, the central pyrazoline ring has an envelope conformation with the atom substituted by the naphthalene ring as the flap. It bridges a benzene ring and a naphthalene ring system which are almost normal to one another, making a dihedral angle of 82.03 (6) °. There is an intramolecular O—H...N hydrogen bond forming anS(6) ring motif. In the crystal, molecules are linked by pairs of N—H...π interactions, forming inversion dimers. There are also C—H...π interactions present and the dimers are linkedviaC—H...O hydrogen bonds, forming ribbons propagating along thea-axis direction.

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