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 Methyl 1-ethyl-3′-[hydroxy(naphthalen-1-yl)methyl]-1′-methyl-2-oxospiro[indoline-3,2′-pyrrolidine]-3′-carboxylate

2014 ◽  
Vol 70 (5) ◽  
pp. o540-o540
Author(s):  
Vinodhkumar Vijayakumar ◽  
Gunther H. Peters ◽  
M. Suresh ◽  
Raghunathan Raghavachary ◽  
G. Jagadeesan
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Molecular Conformation ◽  
Ring System ◽  
Indole Ring ◽  
Pyrrolidine Ring ◽  
Compound C ◽  
Twist Conformation ◽  
Naphthyl Ring

In the title compound, C27H28N2O4, the pyrrolidine ring adopts a twist conformation. The plane of the indole ring is almost perpendicular to that of the pyrrolidine ring, making a dihedral angle of 88.50 (6)°. The planes of the naphthyl ring system and the pyrrolidine ring are tilted by an angle of 55.86 (5)°. The molecular conformation is stabilized by intramolecular O—H...O and O—H...N hydrogen bonds.

scholarly journals Crystal structure of ethyl 1′,1′′-dimethyl-2′′,3-dioxo-3H-dispiro[benzo[b]thiophene-2,3′-pyrrolidine-2′,3′′-indoline]-4′-carboxylate

2015 ◽  
Vol 71 (3) ◽  
pp. o142-o142
Author(s):  
M. P. Savithri ◽  
M. Suresh ◽  
R. Raghunathan ◽  
R. Raja ◽  
A. SubbiahPandi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Ring System ◽  
Pyrrolidine Ring ◽  
Ring Systems ◽  
Envelope Conformation ◽  
Compound C ◽  
The Mean

In the title compound, C23H22N2O4S, the pyrrolidine ring has an envelope conformation with the spiro C atom, shared with the indoline ring system, as the flap. The mean planes of the benzothiophene and indoline ring systems are inclined to the mean plane of the pyrrolidine ring by 88.81 (8) and 79.48 (8)°, respectively, and to each other by 68.12 (5)°. In the crystal, molecules are linkedviaC—H...O hydrogen bonds, forming chains propagating along [001].

4,4-Dimethyl-2-tosyl-2,3,3a,4-tetrahydro-1H,10H-pyrrolo[3,4-c]pyrano[6,5-b]indan-10-one

2007 ◽  
Vol 63 (11) ◽  
pp. o4438-o4438 ◽  
Author(s):  
K. Chinnakali ◽  
D. Sudha ◽  
M. Jayagopi ◽  
R. Raghunathan ◽  
Hoong-Kun Fun
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Chair Conformation ◽  
Ring System ◽  
Pyrrolidine Ring ◽  
Face To Face ◽  
Compound C ◽  
A Chain

The molecule of the title compound, C23H23NO4S, adopts a folded conformation, with the cyclopentadienone ring and tosyl groups arranged in an almost face-to-face fashion. The pyrrolidine ring has an envelope conformation and the dihydropyran ring is in a half-chair conformation. The pyrrolidine and dihydropyran rings are cis-fused. The indenone ring system is essentially planar, and the indene plane forms a dihedral angle of 25.12 (3)° with the sulfonyl-bound benzene ring. In the crystal structure, molecules translated by one unit cell along the a-axis direction are linked into a chain by C—H...O hydrogen bonds. The inversion-related molecules of adjacent chains are linked along the c axis by C—H...O hydrogen bonds into a sheet-like structure parallel to the ac plane.

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 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 1′-(prop-2-yn-1-yl)-1,4-dihydrospiro[benzo[d][1,3]oxazine-2,3′-indolin]-2′-one

2015 ◽  
Vol 71 (7) ◽  
pp. o510-o511
Author(s):  
Y. AaminaNaaz ◽  
J. Kamalraja ◽  
G. Vimala ◽  
P. T. Perumal ◽  
A. SubbiahPandi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Ring System ◽  
Pyrrolidine Ring ◽  
Π Interactions ◽  
Compound C ◽  
Oxazine Ring

In the title compound, C18H14N2O2, the six-membered oxazine ring adopts a half-chair conformation and its mean plane makes a dihedral angle of 83.23 (7)° with the pyrrolidine ring of the indoline ring system. In the crystal, molecules are linkedviaN—H...O hydrogen bonds, forming chains along [100]. The chains are linked by C—H...π interactions, forming slabs parallel to (001).

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 (±)-(1SR,5SR,6SR,7SR,10SR,11SR,13SR)-13-benzyloxy-7-methoxymethoxy-11,15,18,18-tetramethyl-3-oxo-2,4-dioxatetracyclo[12.3.1.01,5.06,11]octadeca-14,16-dien-10-yl benzoate

2015 ◽  
Vol 71 (5) ◽  
pp. 490-493 ◽  
Author(s):  
Takeshi Oishi ◽  
Keisuke Fukaya ◽  
Yu Yamaguchi ◽  
Tomoya Sugai ◽  
Ami Watanabe ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Ring System ◽  
Π Interactions ◽  
Compound C ◽  
Dimensional Network ◽  
Twist Conformation ◽  
The Mean

In the title compound, C36H42O8, the dioxolane ring adopts a twist conformation; the two adjacent C atoms deviate alternately from the mean plane of other atoms by −0.287 (5) and 0.174 (5) Å. The cyclohexane, cyclohexadiene and central cyclooctane rings show chair, half-chair and boat–chair forms, respectively. As a result of the strained ring system, the tetrasubsituted olefin in the cyclohexadiene is skewed from an ideal planar structure. In the crystal, C—H...O hydrogen bonds connect the molecules into a sheet parallel to (100). The sheets are further linked by other weak C—H...O and C—H...π interactions, forming a three-dimensional network.

scholarly journals Crystal structure of 15-(naphthalen-1-yl)-7,7a,8,9,10,11-hexahydro-6a,12a-(methanoepoxymethano)indolizino[2,3-c]quinoline-6,13(5H)-dione

2015 ◽  
Vol 71 (3) ◽  
pp. o150-o151
Author(s):  
M. P. Savithri ◽  
M. Suresh ◽  
R. Raghunathan ◽  
R. Raja ◽  
A. SubbiahPandi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Pyrrolidine Ring ◽  
Plane Parallel ◽  
Compound C ◽  
Twist Conformation ◽  
The Mean ◽  
Ring Motif

In the title compound, C27H24N2O3, the dihedral angle between the mean planes of the dihydrofuran and 3,4-dihydroquinoline ring systems is 70.65 (9)°. The dihydrofuran ring adopts an envelope conformation with the C atom adjacent to the methylene C atom of the pyrrolidine ring as the flap. The five-membered pyrrolidine ring adopts a twist conformation on the N—C(tetrasubstituted) bond. In the crystal, molecules are linkedviapairs of N—H...O hydrogen bonds, forming inversion dimers with anR22(8) ring motif. The dimers are linkedviapairs of C—H...O hydrogen bonds, forming ribbons enclosingR22(12) ring motifs lying in a plane parallel to (01-1).

scholarly journals Crystal structure of 5,10,15-triphenyl-20-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)porphyrin

2014 ◽  
Vol 70 (10) ◽  
pp. o1085-o1086
Author(s):  
Mathias O. Senge ◽  
Hans-Georg Eckhardt
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Central Region ◽  
Title Compound ◽  
Ring System ◽  
Compound C ◽  
Porphyrin Macrocycle ◽  
Phenyl Rings ◽  
Supramolecular Chains

In the title compound, C44H37BN4O2, the dihedral angle between the plane of the porphyrin macrocycle ring system [r.m.s. deviation = 0.159 (1) Å] and those of three phenyl rings are 66.11 (4), 74.75 (4) and 57.00 (4)°. The conformational distortion is characterized by a mixture of ruffled, saddle and in-plane distortion modes. In the crystal, the porphyrin molecules are linked by C—H...π interactions into supramolecular chains running along thea-axis direction. A pair of bifurcated N—H...(N,N) hydrogen bonds occur across the central region of the macrocycle.

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