scholarly journals 2,2′-(Piperazine-1,4-diyl)diacetonitrile

2012 ◽  
Vol 68 (6) ◽  
pp. o1798-o1798
Author(s):  
Wei Gao ◽  
Jing Yang ◽  
Xin-Ling Wang ◽  
Ning Zhou ◽  
Xue-Fen Wu
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Piperazine Ring ◽  
Compound C

The complete molecule of the title compound, C8H12N4, is generated by a crystallographic inversion centre. The piperazine ring adopts a chair conformation with the N-bonded substituents in equatorial positions. In the crystal, molecules are linked by C—H...Nc (c = cyanide) hydrogen bonds.

scholarly journals N-(1H-Indol-3-ylmethylidene)-4-methylpiperazin-1-amine

2013 ◽  
Vol 69 (11) ◽  
pp. o1706-o1706 ◽  
Author(s):  
Channappa N. Kavitha ◽  
Jerry P. Jasinski ◽  
Brian J. Anderson ◽  
H. S. Yathirajan ◽  
Manpreet Kaur
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Ring System ◽  
Indole Ring ◽  
Piperazine Ring ◽  
Compound C

In the title compound, C14H18N4, the piperazine ring is in a slightly distorted chair conformation. The indole ring system is twisted from the piperazine ring, making a dihedral angle of 7.27 (11)°. In the crystal, N—H...N hydrogen bonds link molecules into chains along [10-1].

scholarly journals 1-[4-(4-Hydroxyphenyl)piperazin-1-yl]ethanone

2013 ◽  
Vol 69 (11) ◽  
pp. o1671-o1671 ◽  
Author(s):  
Channappa N. Kavitha ◽  
Jerry P. Jasinski ◽  
Brian J. Anderson ◽  
H. S. Yathirajan ◽  
Manpreet Kaur
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Piperazine Ring ◽  
Compound C ◽  
Acetyl Group ◽  
The Mean

In the title compound, C12H16N2O2, the piperazine ring has a chair conformation. The dihedral angle between the mean planes of the benzene ring and the acetyl group is 48.7 (1)°. In the crystal, molecules are linkedviaO—H...O hydrogen bonds, forming chains propagating along [010].

scholarly journals 2-[2-(4-Methylpiperazin-1-yl)ethyl]isoindoline-1,3-dione

2014 ◽  
Vol 70 (3) ◽  
pp. o287-o287
Author(s):  
Mi Zhou ◽  
Ying Shao ◽  
Yong-an Xia ◽  
Xiao-Long Liu ◽  
Xiao-Qiang Sun
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Three Dimensional ◽  
Chair Conformation ◽  
Ring System ◽  
Piperazine Ring ◽  
Π Interactions ◽  
Compound C ◽  
Dimensional Network

In the title compound, C15H19N3O2, the piperazine ring adopts a chair conformation, with its N—C bonds in pseudo-equatorial orientations. The dihedral angle between the C atoms of the piperazine ring and the phthalamide ring system (r.m.s. deviaiton = 0.008 Å) is 89.30 (8)°. In the crystal, molecules are linked by C—H...O hydrogen bonds, generating a three-dimensional network and aromatic π–π interactions also occur [centroid–centroid distances = 3.556 (1)–3.716 (1) Å].

scholarly journals Crystal structure of 3-[4-(pyrimidin-2-yl)piperazin-1-ium-1-yl]butanoate

2014 ◽  
Vol 70 (9) ◽  
pp. o1063-o1064 ◽  
Author(s):  
Thammarse S. Yamuna ◽  
Jerry P. Jasinski ◽  
Manpreet Kaur ◽  
Brian J. Anderson ◽  
H.S. Yathirajan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Chair Conformation ◽  
Carboxylate Group ◽  
Piperazine Ring ◽  
Zwitterionic Form ◽  
Compound C ◽  
Dimensional Network

The title compound, C12H18N4O2, crystallizes in the zwitterionic form with protonation at the N atom of the piperazine ring bearing the carboxylate group. The piperazine ring adopts a slightly distorted chair conformation. In the crystal, N—H...O hydrogen bonds are observed, forming chains along [010]. The packing is consolidated by C—H...O interactions, which generate a three-dimensional network.

scholarly journals 1-(3,5-Dinitrobenzoyl)-4-(2-methoxyphenyl)piperazine

IUCrData ◽  
2020 ◽  
Vol 5 (11) ◽  
Author(s):  
Chayanna Harish Chinthal ◽  
Channappa N. Kavitha ◽  
Hemmige S. Yathirajan ◽  
Sabine Foro ◽  
Christopher Glidewell
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Stacking Interactions ◽  
Piperazine Ring ◽  
Compound C

In the title compound, C18H18N4O6, the piperazine ring adopts a chair conformation, the amidic N atom is planar (sum of angles = 360°) and the non-amidic N atom is pyramidal (343°). There are no hydrogen bonds of any kind in the crystal, but the molecules are linked by two independent π(nitrobenzene)...π(methoxybenzene) stacking interactions to form π-stacked sheets with inter-centroid separations of 3.8444 (12) and 3.9197 (12) Å.

scholarly journals 3-Methyl-5-(4-methylpiperazin-1-yl)-1-phenyl-1H-pyrazole-4-carbaldehyde

IUCrData ◽  
2016 ◽  
Vol 1 (11) ◽  
Author(s):  
V. M. Sunitha ◽  
N. Manju ◽  
S. Naveen ◽  
B. Kalluraya ◽  
N. K. Lokanath ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Piperazine Ring ◽  
Compound C ◽  
Phenyl Rings

In the title compound, C16H20N4O, the dihedral angle between the pyrazole and phenyl rings is 53.86 (12)°. The piperazine ring adopts a chair conformation with the exocyclic N—C bonds in equatorial orientations. In the crystal, molecules are linked by very weak C—H...O hydrogen bonds to generate [010]C(8) chains, with adjacent molecules related by translation.

scholarly journals (E)-1-{4-[Bis(4-methoxyphenyl)methyl]piperazin-1-yl}-3-(4-ethoxy-3-methoxyphenyl)prop-2-en-1-one

2012 ◽  
Vol 68 (4) ◽  
pp. o1259-o1259
Author(s):  
Yan Zhong ◽  
Xiao-Ping Zhang ◽  
Bin Wu
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Piperazine Ring ◽  
Methyl Group ◽  
Compound C ◽  
Methoxy Groups ◽  
Benzene Rings ◽  
Ring Motif

In the molecule of the title compound, C31H36N2O5, the piperazine ring displays a chair conformation. The dihedral angle between the benzene rings of the bis(4-methoxyphenyl)methyl group is 83.42 (15)°. In the crystal, centrosymmetrically related molecules are linked through pairs of C—H...O hydrogen bonds into dimers, generating anR22(10) ring motif. The dimers are further connected into chains parallel to [2-10] by C—H...O hydrogen bonds involving the methoxy groups.

scholarly journals (E)-3-(2-Ethoxyphenyl)-1-{4-[(2-fluorophenyl)(4-fluorophenyl)methyl]piperazin-1-yl}prop-2-en-1-one

2012 ◽  
Vol 68 (6) ◽  
pp. o1975-o1975
Author(s):  
Yan Zhong ◽  
Bin Wu
Keyword(s):  
Double Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Piperazine Ring ◽  
Compound C

In the title compound, C28H28F2N2O2, the piperazine ring has a chair conformation with the pendant N—C bonds in equatorial orientations. The C=C double bond has an E conformation and the dihedral angle between the fluorobenzene rings is 70.8 (3)°. In the crystal, molecules are linked by C—H...O and C—H...F hydrogen bonds.

scholarly journals (2,3-Difluorophenyl)(4-tosylpiperazin-1-yl)methanone

2013 ◽  
Vol 69 (2) ◽  
pp. o185-o185 ◽  
Author(s):  
S. Sreenivasa ◽  
K. E. ManojKumar ◽  
P. A. Suchetan ◽  
J. Tonannavar ◽  
Yashshwita Chavan ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Piperazine Ring ◽  
Compound C ◽  
Best Fit

In the title compound, C18H18F2N2O3S, the piperazine ring adopts a chair conformation. The dihedral angle between the sulfonyl-bound benzene ring and the best fit plane throught the six non-H atoms of the piperazine ring is 69.4 (2)°, while those between the fluorobenzene and sulfonyl rings and the fluorobenzene and piperazine rings are 30.97 (2) and 75.98 (2)°, respectively. In the crystal, molecules are connected to form a tetrameric unit through C—H...O hydrogen bonds. The structure is further stabilized by weak intermolecular C—H...F interactions, generatingC(8) andC(7) chains running along [100].

scholarly journals 7′-Amino-1′H-spiro[cycloheptane-1,2′-pyrimido[4,5-d]pyrimidin]-4′(3′H)-one

2012 ◽  
Vol 68 (8) ◽  
pp. o2546-o2546
Author(s):  
Shu Chen ◽  
Daxin Shi ◽  
Mingxing Liu ◽  
Jiarong Li
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Chair Conformation ◽  
Boat Conformation ◽  
Compound C ◽  
Dimensional Network

The title compound, C12H17N5O, was obtained by cyclocondensation of 2,4-diaminopyrimidine-5-carbonitrile with cycloheptanone. The tetrahydropyrimidine ring has a distorted boat conformation and the cycloheptane ring adopts a chair conformation. In the crystal, molecules are linkedviaN—H...O and N—H...N hydrogen bonds generating a three-dimensional network.

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