scholarly journals Crystal structure of 2-[4(E)-2,6-bis(4-chlorophenyl)-3-ethylpiperidin-4-ylidene]acetamide

2015 ◽  
Vol 71 (11) ◽  
pp. o832-o833
Author(s):  
K. Priya ◽  
K. Saravanan ◽  
S. Selvanayagam ◽  
S. Kabilan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Chair Conformation ◽  
Piperidine Ring ◽  
Π Interactions ◽  
Piperidine Derivative

In the title piperidine derivative, C21H22Cl2N2O, the piperidine ring adopts a chair conformation. The chlorophenyl rings are oriented at an angle of 45.59 (14)° with respect to each other. In the crystal, molecules are linkedviaN—H...O hydrogen bonds, formingC(4) chains along [100]. The chains are linked by C—H...O hydrogen bonds, forming sheets parallel to theabplane. Within the sheets, there are N—H...π interactions present. The crystal studied was refined as an inversion twin.

scholarly journals Crystal structure of 4-methoxy-N-(piperidine-1-carbonothioyl)benzamide

2017 ◽  
Vol 73 (10) ◽  
pp. 1530-1533
Author(s):  
Khairi Suhud ◽  
Siti Aishah Hasbullah ◽  
Musa Ahmad ◽  
Lee Yook Heng ◽  
Mohammad B. Kassim
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Torsion Angle ◽  
Title Compound ◽  
Three Dimensional ◽  
Chair Conformation ◽  
Dimensional Structure ◽  
Piperidine Ring ◽  
Π Interactions ◽  
Compound C

In the title compound, C14H18N2O2S, the piperidine ring has a chair conformation. Its mean plane is twisted with respect to the 4-methoxybenzoyl ring, with a dihedral angle of 63.0 (3)°. The central N—C(=S)—N(H)—C(=O) bridge is twisted with an N—C—N—C torsion angle of 74.8 (6)°. In the crystal, molecules are linked by N—H...O and C—H...O hydrogen bonds, forming chains along thec-axis direction. Adjacent chains are linked by C—H...π interactions, forming layers parallel to theacplane. The layers are linked by offset π–π interactions [intercentroid distance = 3.927 (3) Å], forming a supramolecular three-dimensional structure.

scholarly journals Crystal structures of three 3-chloro-3-methyl-2,6-diarylpiperidin-4-ones

2017 ◽  
Vol 73 (2) ◽  
pp. 107-111 ◽  
Author(s):  
R. Arulraj ◽  
S. Sivakumar ◽  
Manpreet Kaur ◽  
A. Thiruvalluvar ◽  
Jerry P. Jasinski
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Crystal Structures ◽  
Chair Conformation ◽  
Piperidine Ring ◽  
Dihedral Angles ◽  
Π Interactions ◽  
Phenyl Rings ◽  
The Mean

The syntheses and crystal structure of 3-chloro-3-methyl-r-2,c-6-diphenylpiperidin-4-one, C18H18ClNO, (I), 3-chloro-3-methyl-r-2,c-6-di-p-tolylpiperidin-4-one, C20H22ClNO, (II), and 3-chloro-3-methyl-r-2,c-6-bis(4-chlorophenyl)piperidin-4-one, C18H16Cl3NO, (III), are described. In each structure, the piperidine ring adopts a chair conformation and dihedral angles between the mean planes of the phenyl rings are 58.4 (2), 73.5 (5) and 78.6 (2)° in (I), (II) and (III), respectively. In the crystals, molecules are linked intoC(6) chains by weak N—H...O hydrogen bonds and C—H...π interactions are also observed.

scholarly journals Crystal structure of piperidinium 4-nitrophenolate

2014 ◽  
Vol 70 (12) ◽  
pp. 559-561 ◽  
Author(s):  
N. Swarna Sowmya ◽  
S. Sampathkrishnan ◽  
S. Sudhahar ◽  
G. Chakkaravarthi ◽  
R. Mohan Kumar
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Nitro Group ◽  
Benzene Ring ◽  
Chair Conformation ◽  
Piperidine Ring ◽  
Π Interactions ◽  
Anions And Cations ◽  
Molecular Salt

In the title molecular salt, C5H12N+·C6H4NO3−, the piperidine ring adopts a chair conformation and the cation is protonated at the N atom. In the anion, the nitro group is twisted at an angle of 10.30 (11)° with respect to the attached benzene ring. In the crystal, N—H...O hydrogen bonds link adjacent anions and cations into infinite chains propagating along [100]. The chains are linked by C—H...π interactions, forming sheets lying parallel to (001).

scholarly journals Crystal structure of racemic [(1R,2S,3R,4S,6S)-2,6-bis(furan-2-yl)-4-hydroxy-4-(thiophen-2-yl)cyclohexane-1,3-diyl]bis(thiophen-2-ylmethanone)

2016 ◽  
Vol 72 (7) ◽  
pp. 976-979 ◽  
Author(s):  
Ísmail Çelik ◽  
Cem Cüneyt Ersanlı ◽  
Mehmet Akkurt ◽  
Hayrettin Gezegen ◽  
Rahmi Köseoğlu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Hydroxy Group ◽  
Title Compound ◽  
Furan Ring ◽  
Chair Conformation ◽  
Cyclohexane Ring ◽  
Π Interactions ◽  
Compound C

In the title compound, C28H22O5S3, the central cyclohexane ring adopts a chair conformation. The atoms of the furan ring attached to the 6-position of the central cyclohexane ring are disordered over two sets of sites with occupancies of 0.832 (5) and 0.168 (5). The hydroxy group is disordered over two positions (at the 4- and 6-positions of the cyclohexane ring) in the ratio 0.832 (5):0.168 (5). In the crystal, molecules are linked by C—H...O hydrogen bonds and C—H...π interactions, forming layers parallel to (100).

scholarly journals Crystal structure of 13-(2-methoxyphenyl)-3,4-dihydro-2H-indazolo[1,2-b]phthalazine-1,6,11(13H)-trione

2015 ◽  
Vol 71 (8) ◽  
pp. o604-o605 ◽  
Author(s):  
Abdelmalek Bouraiou ◽  
Sofiane Bouacida ◽  
Hocine Merazig ◽  
Aissa Chibani ◽  
Zouhair Bouaziz
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Chair Conformation ◽  
Dimensional Structure ◽  
Π Interactions ◽  
Compound C ◽  
Cyclohexene Ring ◽  
Centroid Distance ◽  
The Mean

In the title compound, C22H18N2O4, the three fused rings of the pyrazolophthalazine moiety are coplanar (r.m.s. deviation = 0.027 Å). The cyclohexene ring fused to the pyrazolidine ring, so forming the indazolophthalazine unit, has a half-chair conformation. The benzene ring is almost normal to the mean plane of the pyrazolophthalazine moiety, with a dihedral angle of 87.21 (6)° between their planes. In the crystal, molecules are linked by pairs of C—H...O hydrogen bonds forming inversion dimers. The dimers are linkedviaC—H...π interactions, forming slabs parallel to (100). Between the slabs there are weak π–π interactions [shortest inter-centroid distance = 3.6664 (9) Å], leading to the formation of a three-dimensional structure.

scholarly journals 4-Azaniumyl-2,2,6,6-tetramethylpiperidin-1-ium dinitrate

2014 ◽  
Vol 70 (6) ◽  
pp. o642-o642 ◽  
Author(s):  
Hammouda Chebbi ◽  
Ridha Ben Smail ◽  
Mohamed Faouzi Zid
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Chair Conformation ◽  
Piperidine Ring ◽  
Dimensional Network

In the crystal structure of the title salt, C9H22N22+·2NO3−, the piperidine ring of the dication adopts a chair conformation and the orientation of the C—NH3bond is equatorial. The ions are linked by normal and bifurcated N—H...O hydrogen bonds inR22(6), twoR42(8) andR34(14) graf-set motifs, generating a three-dimensional network.

scholarly journals Crystal structure of 1,4,5,6,7,8,9,10,11,12,13-undecahydrocyclododeca[c]pyrazol-3-ol

2015 ◽  
Vol 71 (10) ◽  
pp. o752-o753
Author(s):  
Casey C. Raymond ◽  
Michael A. Knopp
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Π Interactions ◽  
Compound C

The title compound, C13H22N2O, crystallized as a pyrazolol tautomer. The 12-membered macrocycle has a distorted chair conformation. In the crystal, molecules are linkedviapairs of O—H...N hydrogen bonds, forming inversion dimers. The dimers are linkedviaN—H...π and C—H...π interactions, forming slabs parallel to thebcplane.

scholarly journals Crystal structure of 4-chloro-N-[2-(piperidin-1-yl)ethyl]benzamide monohydrate

2015 ◽  
Vol 71 (1) ◽  
pp. o39-o40 ◽  
Author(s):  
K. Prathebha ◽  
D. Reuben Jonathan ◽  
B. K Revathi ◽  
S. Sathya ◽  
G. Usha
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Dihedral Angle ◽  
Title Compound ◽  
Phenyl Ring ◽  
Chair Conformation ◽  
Piperidine Ring ◽  
Compound C ◽  
The Mean

In the title compound, C14H19ClN2O2·H2O, the piperdine ring adopts a chair conformation. The dihedral angle between the mean plane of the piperidine ring and that of the phenyl ring is 41.64 (1)°. In the crystal, molecules are linked by O—H...N, N—H...O and C—H...O hydrogen bonds involving the water molecule, forming double-stranded chains propagating along [010].

scholarly journals The crystal structures and Hirshfeld surface analysis of 6-(naphthalen-1-yl)-6a-nitro-6,6a,6b,7,9,11a-hexahydrospiro[chromeno[3′,4′:3,4]pyrrolo[1,2-c]thiazole-11,11′-indeno[1,2-b]quinoxaline] and 6′-(naphthalen-1-yl)-6a′-nitro-6′,6a′,6b′,7′,8′,9′,10′,12a′-octahydro-2H-spiro[acenaphthylene-1,12′-chromeno[3,4-a]indolizin]-2-one

2019 ◽  
Vol 75 (10) ◽  
pp. 1519-1524
Author(s):  
G. Foize Ahmad ◽  
A. Syed Mohammed Mujaheer ◽  
M. NizamMohideen ◽  
M. Gulam Mohamed ◽  
V. Viswanathan
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Chair Conformation ◽  
Piperidine Ring ◽  
Thiazole Ring ◽  
Boat Conformation ◽  
Pyran Ring ◽  
Axis Direction ◽  
Π Interactions ◽  
Spiro Derivatives

The title compounds, 6-(naphthalen-1-yl)-6a-nitro-6,6a,6 b,7,9,11a-hexahydrospiro[chromeno[3′,4′:3,4]pyrrolo[1,2-c]thiazole-11,11′-indeno[1,2-b]quinoxaline], C37H26N4O3S, (I), and 6′-(naphthalen-1-yl)-6a′-nitro-6′,6a′,6b′,7′,8′,9′,10′,12a′-octahydro-2H-spiro[acenaphthylene-1,12′-chromeno[3,4-a]indolizin]-2-one, C36H28N2O4, (II), are new spiro derivatives, in which both the pyrrolidine rings adopt twisted conformations. In (I), the five-membered thiazole ring adopts an envelope conformation, while the eight-membered pyrrolidine-thiazole ring adopts a boat conformation. An intramolecular C—H...N hydrogen bond occurs, involving a C atom of the pyran ring and an N atom of the pyrazine ring. In (II), the six-membered piperidine ring adopts a chair conformation. An intramolecular C—H...O hydrogen bond occurs, involving a C atom of the pyrrolidine ring and the keto O atom. For both compounds, the crystal structure is stabilized by intermolecular C—H...O hydrogen bonds. In (I), the C—H...O hydrogen bonds link adjacent molecules, forming R 2 2(16) loops propagating along the b-axis direction, while in (II) they form zigzag chains along the b-axis direction. In both compounds, C—H...π interactions help to consolidate the structure, but no significant π–π interactions with centroid–centroid distances of less than 4 Å are observed.

scholarly journals Crystal structure of 1-[2,4-bis(4-methoxyphenyl)-3-azabicyclo[3.3.1]nonan-3-yl]ethanone

2014 ◽  
Vol 70 (11) ◽  
pp. o1171-o1172 ◽  
Author(s):  
V. Shreevidhyaa Suressh ◽  
S. Sathya ◽  
A. Akila ◽  
S. Ponnuswamy ◽  
G. Usha
Keyword(s):  
Crystal Structure ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Cyclohexane Ring ◽  
Piperidine Ring ◽  
Dihedral Angles ◽  
Π Interactions ◽  
Compound C

In the title compound, C24H29NO3, the azabicycle contains two six-membered rings,viz.a cyclohexane ring and a piperidine ring. The first adopts a chair conformation and the second a half-chair conformation. The dihedral angle between their mean planes is 86.21 (13)°, indicating that they are almost perpendicular to one another. The dihedral angle between the planes of the 4-methoxyphenyl rings is 17.51 (13)°, and they make dihedral angles of 81.9 (3) and 81.3 (3)° with the ethan-1-one group. In the crystal, molecules are linked by C—H...π interactions forming chains along [10-1].

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