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-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 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].

7,7a-Dihydroisoindolo[2,1-a]pyrimidin-12-one

2006 ◽  
Vol 62 (7) ◽  
pp. o2929-o2931
Author(s):  
Mustafa Odabaşoğlu ◽  
Orhan Büyükgüngör
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Naphthalene Ring ◽  
Π Interactions ◽  
Compound C

The crystal structure of the title compound, C18H12N2O, is stabilized by intermolecular N—H...O hydrogen bonds and C—H...π interactions. N—H...O hydrogen bonds generate a C(6) chain. The dihedral angle between the isoindoline group and the naphthalene ring system is 24.96 (12)°.

scholarly journals 1-[(4-Methoxyphenyl)sulfonyl]-1H-indole-3-carbaldehyde

IUCrData ◽  
2016 ◽  
Vol 1 (1) ◽  
Author(s):  
E. A. Jithesh Babu ◽  
K. S. Vinay Kumar ◽  
Chandra ◽  
M. P. Sadashiva ◽  
M. Mahendra
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Indole Ring ◽  
Sulfonyl Group ◽  
Compound C ◽  
The Mean

In the molecule of the title compound, C16H13NO4S, the mean plane of the indole ring system and that of the methoxyphenyl ring, which are bridged by a sulfonyl group, are inclined at a dihedral angle of 88.98 (9)°. The crystal structure is stabilized by intermolecular C—H...O hydrogen bonds.

scholarly journals 9-Fluoro-2,4,4a,6-tetrahydrospiro[benzo[c]chromene-3,2′-[1,3]dioxolane]

IUCrData ◽  
2017 ◽  
Vol 2 (1) ◽  
Author(s):  
I. Ayswariya ◽  
P. Rajalakshmi ◽  
R.V. Krishnakumar ◽  
N. Srinivasan
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Ring System ◽  
Pyran Ring ◽  
Compound C ◽  
Cyclohexene Ring ◽  
The Mean ◽  
Chromene Ring

In the title compound, C15H15FO3, the dihedral angle between the mean plane through all the non-H atoms of the dioxolane ring with those of the rest of the atoms of the chromene ring system, including the substituent F atom, is 81.1 (1)°. The pyran ring has an envelope conformation with the O atom as the flap. The cyclohexene ring has a half-chair conformation, while the dioxolane ring has a twisted conformation on an –O—CH2– bond. In the crystal, molecules are linkedviaC—H...O hydrogen bonds, forming chains along [100]. The chains are linked by C—H...π interactions, involving the fluorobenzene ring, forming layers parallel to theacplane.

scholarly journals 12-Ethyl-6a,10a-dihydro-5H-6-oxachrysene

IUCrData ◽  
2020 ◽  
Vol 5 (3) ◽  
Author(s):  
Alan J. Lough ◽  
Austin Pounder ◽  
William Tam
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Ring System ◽  
Naphthalene Ring ◽  
Pyran Ring ◽  
Compound C

In the title compound, C19H16O, the pyran ring is in a half-chair conformation. The essentially planar naphthalene ring system (r.m.s. deviation = 0.020 Å) forms a dihedral angle of 14.37 (5)° with the fused benzene ring. In the crystal, pairs of molecules are connected into inversion dimers by weak C—H...O hydrogen bonds to generate R 2 2(6) loops.

scholarly journals 9-(4-Formylphenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione

IUCrData ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
R. Kalaivanan ◽  
V. Sughanya ◽  
N. Sureshbabu
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Boat Conformation ◽  
Pyran Ring ◽  
Envelope Conformation ◽  
Compound C ◽  
The Mean

In the title compound, C24H26O4, the central 4H-pyran ring adopts a flattened boat conformation, with the mean and maximum deviations of the ring being 0.0582 (6) and 0.1012 (3) Å, respectively. The two cyclohexenone rings on opposite sides of the pyran ring each adopt an envelope conformation; the C atom bearing a dimethyl substituent is the flap atom in each case. The mean planes of the pyran ring and the substituent benzene ring subtend a dihedral angle of 86.45 (2)°. In the crystal, molecules are linked into inversion dimers via pairs of C—H...O hydrogen bonds.

scholarly journals Crystal structure of (E)-2-[1-(benzo[d][1,3]dioxol-5-yl)ethylidene]-N-methylhydrazine-1-carbothioamide

2015 ◽  
Vol 71 (1) ◽  
pp. o35-o36 ◽  
Author(s):  
Adriano Bof de Oliveira ◽  
Christian Näther ◽  
Inke Jess ◽  
Renan Lira de Farias ◽  
Iasmin Alves Ribeiro
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Maximum Deviation ◽  
Methyl Groups ◽  
Compound C ◽  
The Mean

In the title compound, C11H13N3O2S, there is a short intramolecular N—H...N contact. The benzo[d][1,3]dioxole ring system is approximately planar (r.m.s. deviation = 0.025 Å) and makes a dihedral angle of 56.83 (6)° with the mean plane of the methylthiosemicarbazone fragment [–N—N—C(=S)—N—C; maximum deviation = 0.1111 (14) Å for the imino N atom]. In the crystal, molecules are linkedviapairs of N—H...S hydrogen bonds, forming inversion dimers. The dimers are connected by N—H...S hydrogen bonds into layers parallel to (100). The H atoms of both methyl groups are disordered over two sets of sites and were refined with occupancy ratios of 0.5:0.5 and 0.75:0.25.

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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