scholarly journals Crystal structure of 5′′-(4-chlorobenzylidene)-4′-(4-chlorophenyl)-1′-methyltrispiro[acenapthylene-1,2′-pyrrolidine-3′,1′′-cyclohexane-3′′,2′′′-[1,3]dioxane]-2(1H),6′′-dione

2015 ◽  
Vol 71 (11) ◽  
pp. o814-o815 ◽  
Author(s):  
Kuppan Chandralekha ◽  
Deivasigamani Gavaskar ◽  
Adukamparai Rajukrishnan Sureshbabu ◽  
Srinivasakannan Lakshmi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Ring System ◽  
Membered Ring ◽  
Boat Conformation ◽  
Pyrrolidine Ring ◽  
Hydrogen Bond Interaction ◽  
Compound C ◽  
Twist Conformation

In the title compound, C36H29Cl2NO4, two spiro links connect the methyl-substituted pyrrolidine ring to the acenaphthylene and cyclohexanone rings. The cyclohexanone ring is further connected to the dioxalane ring by a third spiro junction. The five-membered ring of the acenaphthylen-1-one ring system adopts a flattened envelope conformation, with the ketonic C atom as the flap, whereas the dioxalane and pyrrolidine rings each have a twist conformation. The cyclohexenone ring assumes a boat conformation. An intramolecular C—H...O hydrogen-bond interaction is present. In the crystal, molecules are linked by non-classical C—H...O hydrogen bonds, forming chains extending parallel to theaaxis.

scholarly journals Crystal structure of 5′′-benzylidene-1′-methyl-4′-phenyltrispiro[acenaphthylene-1,2′-pyrrolidine-3′,1′′-cyclohexane-3′′,2′′′-[1,3]dioxane]-2,6′′-dione

2016 ◽  
Vol 72 (3) ◽  
pp. 387-390 ◽  
Author(s):  
Kuppan Chandralekha ◽  
Deivasigamani Gavaskar ◽  
Adukamparai Rajukrishnan Sureshbabu ◽  
Srinivasakannan Lakshmi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Ring System ◽  
Membered Ring ◽  
Boat Conformation ◽  
Pyrrolidine Ring ◽  
Related Molecule ◽  
Compound C ◽  
Twist Conformation ◽  
Graph Set

In the title compound, C36H31NO4, two spiro links connect the methyl-substituted pyrrolidine ring to the acenaphthylene and cyclohexanone rings. The cyclohexanone ring is further connected to the dioxalane ring by a third spiro junction. The five-membered ring of the acenaphthylen-1-one ring system adopts a flattened envelope conformation with the ketonic C atom as flap, whereas the dioxalane and pyrrolidine rings each have a twist conformation. The cyclohexanone ring assumes a boat conformation. Three intramolecular C—H...O hydrogen bonds involving both ketonic O atoms as acceptors are present. In the crystal, C—H...O hydrogen bonds connect centrosymmetrically related molecule into chains parallel to thebaxis, forming rings ofR22(10)andR22(8) graph-set motifs.

scholarly journals (5,7-Dimethyl-2-oxo-2H-chromen-4-yl)methyl pyrrolidine-1-carbodithioate

2012 ◽  
Vol 68 (6) ◽  
pp. o1584-o1584
Author(s):  
N. M. Mahabaleshwaraiah ◽  
K. Mahesh Kumar ◽  
O. Kotresh ◽  
Waleed Fadl Ali Al-eryani ◽  
H. C. Devarajegowda
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Ring System ◽  
Maximum Deviation ◽  
Pyrrolidine Ring ◽  
Compound C ◽  
Centroid Distance ◽  
Planar Part ◽  
Chromene Ring

In the title compound, C17H19NO2S2, the 2H-chromene ring system is almost planar, with a maximum deviation of 0.044 (2) Å, and the pyrrolidine ring adopts an envelope conformation. The dihedral angle between the 2H-chromene system and the planar part of the pyrrolidine ring is 83.65 (8)°. A weak intramolecular C—H...S hydrogen bond occurs. The crystal structure features C—H...O hydrogen bonds and π–π interactions, with a centroid–centroid distance of 3.5728 (16) Å.

scholarly journals Crystal structure of ethyl 2-amino-4-(4-methoxyphenyl)-4H-1-benzothieno[3,2-b]pyran-3-carboxylate

2015 ◽  
Vol 71 (5) ◽  
pp. o366-o367
Author(s):  
Mohamed Bakhouch ◽  
Abdelali Kerbal ◽  
Mohamed El Yazidi ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Ring System ◽  
Membered Ring ◽  
Carboxylate Group ◽  
Compound C ◽  
Fused Ring ◽  
The Mean ◽  
Fused Ring System

The molecule of the title compound, C21H19NO4S, features a fused ring system whereby a five-membered ring is flanked by two six-membered rings. This is linked to an ethyl 3-carboxylate group and to a methoxybenzene group. The fused-ring system is quasi-planar, with the greatest deviation from the mean plane being 0.131 (1) Å for the methine C atom. The plane through the methoxybenzene ring is nearly perpendicular to that through the fused-ring system, as indicated by the dihedral angle of 85.72 (6)°. An intramolecular N—H...O hydrogen bond is noted. In the crystal, molecules are linked by N—H...O hydrogen bonds, forming layers that stack along theaaxis.

scholarly journals Crystal structure of 3′-(1H-indole-3-carbonyl)-1′-methyl-2-oxo-4′-(4-oxo-4H-chromen-3-yl)spiro[indoline-3,2′-pyrrolidine]-3′-carbonitrile

2015 ◽  
Vol 71 (11) ◽  
pp. o898-o899
Author(s):  
M. P. Savithri ◽  
R. Raja ◽  
D. Kathirvelan ◽  
B. S. R. Reddy ◽  
A. SubbiahPandi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Ring System ◽  
Dimensional Structure ◽  
Indole Ring ◽  
Pyrrolidine Ring ◽  
Compound C ◽  
Twist Conformation ◽  
Chromene Ring

In the title compound, C31H22N4O4, the pyrrolidine ring adopts a twist conformation on the N—CH2bond. The indolin-2-one and the 1H-indole rings are nearly planar (r.m.s. deviations = 0.06 and 0.011 Å, respectively) and are inclined to one another by 34.19 (9)°. The chromene ring system is also nearly planar (r.m.s. deviation = 0.029 Å). It is almost normal to the 1H-indole ring system, with a dihedral angle of 88.71 (8)°, and is inclined to the indolin-2-one ring system by 72.76 (8)°. In the crystal, molecules are linkedviaN—H...O hydrogen bonds, forming slabs parallel to (10-1). The slabs are linked by C—H...O hydrogen bonds, forming a three-dimensional structure.

scholarly journals Crystal structure of 4,5,6,7,8,8-hexachloro-2-(3,4-dimethoxyphenethyl)-3a,4,7,7a-tetrahydro-1H-4,7-methanoisoindole-1,3(2H)-dione [+solvent]

2019 ◽  
Vol 75 (5) ◽  
pp. 562-564
Author(s):  
R. Manohar ◽  
M. Harikrishna ◽  
S. Harikrishna Etti ◽  
C. Ramanathan ◽  
K. Gunasekaran
Keyword(s):  
Crystal Structure ◽  
Molecular Weight ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Membered Ring ◽  
Boat Conformation ◽  
Pyrrolidine Ring ◽  
Intermolecular Hydrogen Bonds ◽  
Acta Cryst ◽  
Compound C

In the title compound, C19H15Cl6NO4 [+solvent], the six-membered ring of the norbornene moiety adopts a boat conformation and the two five-membered rings have envelope conformations. The pyrrolidine ring makes a dihedral angle of 14.83 (12)° with the 3,4-dimethoxyphenyl ring, which are attached to each other by an extended N—CH2—CH2—Car bridge. In the crystal, the structure features C—H...O intermolecular hydrogen bonds, an offset π–π interaction [intercentroid distance = 3.564 (1) Å] and a C—Cl...π interaction. The contribution of some disordered solvent to the scattering was removed using the SQUEEZE routine [Spek (2015). Acta Cryst. C71, 9–18] of PLATON. The solvent contribution was not included in the reported molecular weight and density.

scholarly journals Crystal structure of methyl 3′-benzamido-4′-(4-methoxyphenyl)-1′-methylspiro[indeno[1,2-b]quinoxaline-11,2′-pyrrolidine]-3′-carboxylate

2016 ◽  
Vol 72 (9) ◽  
pp. 1257-1259
Author(s):  
Kuppan Chandralekha ◽  
Adukamparai Rajukrishnan Sureshbabu ◽  
Deivasigamani Gavaskar ◽  
Srinivasakannan Lakshmi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Ring System ◽  
Amino Group ◽  
Pyrrolidine Ring ◽  
Pyrazine Ring ◽  
Compound C ◽  
Twist Conformation

In the title compound, C35H30N4O3, the spiro C atom connects the five-membered pyrrolidine ring and the indenoquinoxaline ring system. The pyrrolidine ring adopts a twist conformation. An intramolecular N—H...N interaction between the amino group and the pyrazine ring is observed. In the crystal, molecules are linked by a pairs of C—H...O hydrogen bonds, forming inversion dimers.

scholarly journals Crystal structure of ethyl 5′′-fluoro-2′′,3-dioxo-6′,7′,8′,8a'-tetrahydro-2′H,3H,5′H-dispiro[benzo[b]thiophene-2,1′-indolizine-3′,3′′-indoline]-2′-carboxylate

2015 ◽  
Vol 71 (3) ◽  
pp. o156-o157 ◽  
Author(s):  
R. Raja ◽  
J. Govindaraj ◽  
M. Suresh ◽  
R. Raghunathan ◽  
A. SubbiahPandi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Chair Conformation ◽  
Ring System ◽  
Membered Ring ◽  
Piperidine Ring ◽  
Pyrrolidine Ring ◽  
Compound C ◽  
The Mean ◽  
Ring Motif

In the title compound, C25H23FN2O4S, the fused piperidine ring of the octahydroindolizine ring system adopts a chair conformation and the five-membered ring has a twisted conformation on the N—C(spiro) bond. The mean planes of the benzothiophene and indoline ring systems are inclined to the mean plane of the pyrrolidine ring by 83.1 (1) and 84.9 (1)°, respectively, and to each other by 29.37 (17)°. In the crystal, molecules are linkedviapairs of N—H...O hydrogen bonds, forming inversion dimers with anR22(8) ring motif. The dimers are linkedviaC—H...O hydrogen bonds, forming slabs lying parallel to (100). The packing between the slabs features a short [2.734 (2) Å] F...F contact.

scholarly journals Crystal structure of (1′S,2′S,3S)-1′-benzoyl-2′-(4-methoxyphenyl)-1-methyl-2′,5′,6′,10b′-tetrahydro-1′H-spiro[indoline-3,3′-pyrrolo[2,1-a]isoquinolin]-2-one

2020 ◽  
Vol 76 (10) ◽  
pp. 1548-1550
Author(s):  
Janet Priyavathani Selvaraj ◽  
Stella Mary ◽  
Jyoti Boruah Dhruba ◽  
Birkumar Singh Huidrom ◽  
Yuvaraj Panneerselvam ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Ring System ◽  
Spiro Compound ◽  
Pyrrolidine Ring ◽  
Compound C ◽  
C And N

In the title spiro compound, C34H30N2O3, the central pyrrolidine ring is fused with the tetrahydroisoquinoline ring, both having distorted envelope conformations, with the flap atoms being C and N, respectively. The methoxyphenyl group is attached to the pyrrolidine ring, and is disordered over two positions, with refined occupancies of 0.638 (6):0.362 (6) Å. The central pyrrolidine ring is inclined relative to the tetrahydroisoquinoline group, such that the dihedral between the non-flap atoms of each ring system is 11.29 (7)°. The spiro-linkage creates a dihedral angle of 83.26 (5)° between the indolinone ring and the non-flap atoms of the pyrrolidine ring. In the crystal, molecules are linked via C—H...O hydrogen bonds. For the major disorder component, these form C(11) chains that propagate parallel to the a axis.

scholarly journals (Z)-3-Benzyl-1,5-benzothiazepin-4(5H)-one

2012 ◽  
Vol 68 (8) ◽  
pp. o2329-o2329
Author(s):  
V. Sabari ◽  
R. Selvakumar ◽  
M. Bakthadoss ◽  
S. Aravindhan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Membered Ring ◽  
Boat Conformation ◽  
Compound C

In the crystal structure of the title compound, C16H13NOS, molecules are linked into cyclic centrosymmetricR22(8) dimersviapairs of N—H...O hydrogen bonds. The seven-membered ring adopts a boat conformation.

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].

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