scholarly journals 3-(2-Methoxyphenyl)-2,3-dihydro-1H-benzo[f]chromen-1-one

IUCrData ◽  
2020 ◽  
Vol 5 (9) ◽  
Author(s):  
Jiha Sung
Keyword(s):  
Benzene Ring ◽  
Title Compound ◽  
Methoxy Group ◽  
Ring System ◽  
Pyran Ring ◽  
Envelope Conformation ◽  
Compound C ◽  
Naphthyl Ring

In the title compound, C20H16O3, the 2-methoxyphenyl ring is tilted by 50.67 (3)° with respect to the naphthyl ring system. The central pyran ring has an envelope conformation with the C atom bearing the pendant ring system as the flap. The methoxy group attached to the benzene ring is slightly twisted [C—C—O—C = −15.2 (1)°] from the ring. In the crystal, weak C—H...O interactions link the molecules into C(7) chains propagating along [101].

scholarly journals Ethyl 2-amino-4-(4-fluorophenyl)-6-methoxy-4H-benzo[h]chromene-3-carboxylate

2012 ◽  
Vol 68 (6) ◽  
pp. o1803-o1804 ◽  
Author(s):  
Ahmed M. El-Agrody ◽  
Mohamed A. Al-Omar ◽  
Abdel-Galil E. Amr ◽  
Tze Shyang Chia ◽  
Hoong-Kun Fun
Keyword(s):  
Benzene Ring ◽  
Methoxy Group ◽  
Crystal Packing ◽  
Ring System ◽  
Maximum Deviation ◽  
Boat Conformation ◽  
Pyran Ring ◽  
Compound C ◽  
The Mean ◽  
Chromene Ring

In the title compound, C23H20FNO4, the fluoro-substituted benzene ring is approximately perpendicular to the mean plane of the 4H-benzo[h]chromene ring system [maximum deviation = 0.264 (1) Å], with a dihedral angle of 83.79 (6)°. The pyran ring adopts a flattened boat conformation. The methoxy group is slightly twisted from the attached benzene ring of the 4H-benzo[h]chromene moiety [C—O—C—C = −2.1 (2)°]. An intramolecular N—H...O hydrogen bond generates an S(6) ring motif. In the crystal, molecules are linked by N—H...O and N—H...F hydrogen bonds into a layer parallel to the bc plane. The crystal packing also features C—H...π interactions.

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 (E)-1-(2-Hydroxy-6-methoxyphenyl)-3-(2-methoxynaphthalen-1-yl)prop-2-en-1-one

IUCrData ◽  
2019 ◽  
Vol 4 (9) ◽  
Author(s):  
Jiha Sung
Keyword(s):  
Hydrogen Bond ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Methoxy Group ◽  
Ring System ◽  
Naphthalene Ring ◽  
Compound C ◽  
Phenol Ring ◽  
Ring Motif

In the title compound, C21H18O4, the dihedral angle between the naphthelene ring system (r.m.s. deviation = 0.014 Å) and the benzene ring is 9.68 (1)°. The C atom of the methoxy group of the naphthalene ring system is almost coplanar with the ring [C—O—C—C = −2.0 (3)°], whereas the C atom of the methoxy group of the phenol ring is slightly twisted [C—O—C—C = 6.2 (3)°]. An intramolecular O—H...O hydrogen bond generates an S(6) ring motif.

scholarly journals 2-[3-(1,3-Benzothiazol-2-yl)-2,2-dimethylpropyl]-2-methyl-2,3-dihydro-1,3-benzothiazole

2012 ◽  
Vol 68 (8) ◽  
pp. o2349-o2349
Author(s):  
Sammer Yousuf ◽  
Hina Siddiqui ◽  
Rabia Farooq ◽  
M. Iqbal Choudhary
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Thiazole Ring ◽  
Maximum Deviation ◽  
Envelope Conformation ◽  
Compound C ◽  
Graph Set

In the title compound, C20H22N2S2, the five-membered thiazole ring of the 2-methyl-2,3-dihydro-1,3-benzothiazole unit has an envelope conformation. The dihedral angle between the planar [maximum deviation of 0.014 (1) Å for the S atom] benzothiazole ring system and the benzene ring is 78.37 (12)°. Two intramolecular C—H...S hydrogen bonds are observed, forming rings of graph-set motifS(6). In the crystal, the molecules are consolidated in pairs through N—H...N hydrogen bonds and are arranged parallel to thebaxis.

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 14-Ethoxy-4,6,9-trimethyl-8,12-dioxa-4,6-diazatetracyclo[8.8.0.02,7.013,18]octadeca-2(7),13,15,17-tetraene-3,5,11-trione

2013 ◽  
Vol 69 (2) ◽  
pp. o272-o272 ◽  
Author(s):  
G. Jagadeesan ◽  
D. Kannan ◽  
M. Bakthadoss ◽  
S. Aravindhan
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Methoxy Group ◽  
Pyran Ring ◽  
Pyrone Ring ◽  
Compound C

In the title compound, C19H20N2O6, the pyrone and pyran rings adopt envelope conformations with the same common C atom as the flap, the dihedral angle between the planes of the remaining ring atoms being 68.27 (4)°. The planar atoms of the pyran ring and the diazacyclic ring are almost coplanar, the dihedral angle between their mean planes being 3.29 (7)°. Moreover, the planar atoms of the pyrone ring and benzene ring of the coumarin unit are also close to coplanar, the dihedral angle between their mean planes being 8.03 (9)°. The methoxy group lies in the plane of the benzene ring, with a dihedral angle between their mean planes of 9.4 (2)°. In the crystal, the molecules are linked by C—H...O hydrogen bonds resulting in sheets of molecules in theacplane.

scholarly journals 3-(2-Methylphenyl)-3a,4-dihydro-3H-chromeno[4,3-c]isoxazole-3a-carbonitrile

2013 ◽  
Vol 69 (2) ◽  
pp. o181-o181
Author(s):  
G. Suresh ◽  
J. Srinivasan ◽  
M. Bakthadoss ◽  
S. Aravindhan
Keyword(s):  
Benzene Ring ◽  
Dihedral Angle ◽  
Intermolecular Interactions ◽  
Title Compound ◽  
Chair Conformation ◽  
Ring System ◽  
Pyran Ring ◽  
Isoxazole Ring ◽  
Compound C ◽  
The Mean

In the title compound, C18H14N2O2, the pyran ring of the chromeno ring system has a half-chair conformation, and the dihedral angle between its mean plane and the benzene ring is 5.3 (2)°. The isoxazole ring forms a dihedral angle of 74.6 (2)° with the attached benzene ring and is inclined to the mean plane of the chromeno ring system by 15.06 (19)°. In the crystal, there are no significant intermolecular interactions.

scholarly journals rac-6-Ethoxy-3,3a,4,9b-tetrahydro-1,3-diphenyl-1H-chromeno[4,3-c]isoxazole-3a-carbonitrile

2012 ◽  
Vol 68 (6) ◽  
pp. o1660-o1660 ◽  
Author(s):  
S. Paramasivam ◽  
J. Srinivasan ◽  
P. R. Seshadri ◽  
M. Bakthadoss
Keyword(s):  
Benzene Ring ◽  
Dihedral Angle ◽  
Intermolecular Interactions ◽  
Title Compound ◽  
Pyran Ring ◽  
Space Group ◽  
Isoxazole Ring ◽  
Envelope Conformation ◽  
Compound C ◽  
The Mean

The title compound, C25H22N2O3, with three stereogenic centres, crystallizes in a centrosymmetric space group as a racemate. The pyran ring adopts a sofa conformation and the five-membered isoxazole ring exhibits an envelope conformation. The dihedral angle between the benzene ring and the mean plane through the near coplanar atoms of the pyran ring is 10.54 (9)°. In the crystal, no significant intermolecular interactions are observed.

scholarly journals 12,15-Dimethyl-8-oxatetracyclo[8.8.0.02,7.011,16]octadeca-1(18),2,4,6,11(16),12,14-heptaen-10-ol

IUCrData ◽  
2020 ◽  
Vol 5 (3) ◽  
Author(s):  
Alan J. Lough ◽  
Samuel Koh ◽  
William Tam
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Chair Conformation ◽  
Ring System ◽  
The Other ◽  
Pyran Ring ◽  
Compound C ◽  
Fused Ring ◽  
Fused Ring System

In the title compound, C19H18O2, the pyran ring is in a half-chair conformation. The fused ring system comprising the benzene and cyclohexene rings is essentially planar (r.m.s. deviation = 0.053 Å) and forms a dihedral angle of 27.95 (6)° with the other benzene ring. In the crystal, O—H...O hydrogen bonds connect the molecules into chains propagating along [001].

scholarly journals N-(3-Chloro-4-ethoxy-1-methyl-1H-indazol-5-yl)-4-methoxybenzenesulfonamide

2014 ◽  
Vol 70 (6) ◽  
pp. o679-o679 ◽  
Author(s):  
Hakima Chicha ◽  
El Mostapha Rakib ◽  
Abdellah Hannioui ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Ring System ◽  
Dihedral Angles ◽  
Ethoxy Group ◽  
Π Interactions ◽  
Compound C ◽  
The Mean

The indazole ring system of the title compound, C17H18ClN3O4S, is almost planar (r.m.s. deviation = 0.0113 Å) and forms dihedral angles of 32.22 (8) and 57.5 (3)° with the benzene ring and the mean plane through the 4-ethoxy group, respectively. In the crystal, molecules are connected by pairs of N—H...O hydrogen bonds into inversion dimers, which are further linked by π–π interactions between the diazole rings [intercentroid distance = 3.4946 (11) Å], forming chains parallel to [101].

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