1,4-Bis[2,2-bis(trimethylsilyl)ethenyl]benzene

2007 ◽  
Vol 63 (11) ◽  
pp. o4357-o4357
Author(s):  
Piotr Pawluć ◽  
Bogdan Marciniec ◽  
Maciej Kubicki
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
Compound C

The molecules of the title compound, C22H42Si4, are centrosymmetric. van der Waals interactions determine the crystal structure.

Methyl [(1E)-(4-methoxyphenyl)methyleneamino]acetate

2007 ◽  
Vol 63 (3) ◽  
pp. o1459-o1461 ◽  
Author(s):  
Hector Novoa de Armas ◽  
Enriquez Ruiz Reyes ◽  
Esperanza Salfrán Solano ◽  
Margarita Suárez Navarro ◽  
Norbert Blaton
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Weak Interactions ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
Compound C ◽  
Methoxycarbonyl Group

In the title compound, C11H13NO3, the methoxycarbonyl group is rotated out of the plane of the 4-methoxybenzyl group. The conformation found in the crystal structure differs from that computed in vacuo, where the two groups are coplanar. The crystal structure is stabilized by van der Waals interactions and weak interactions of the C—H...O type.

scholarly journals (4RS)-Methyl 4-cyano-4-cyclohexyl-4-phenylbutanoate

2012 ◽  
Vol 68 (6) ◽  
pp. o1894-o1894
Author(s):  
Gui-Sheng Sun ◽  
Yu-Lai Hu ◽  
Dan-Feng Huang ◽  
Chang-Ming Xu
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Van Der Waals ◽  
Chair Conformation ◽  
Van Der Waals Interactions ◽  
Compound C

In the crystal structure of the title compound, C18H23NO2, there are only van der Waals interactions present. The cyclohexyl ring has a chair conformation. The longer axes of the displacement parameters of the non-H atoms forming the ethylmethylcarboxylate skeleton are perpendicular to the plane through the non-H atoms of this skeleton.

scholarly journals Ethyl (3-nitro-2-oxo-1,2-dihydropyridin-1-yl)acetate

2006 ◽  
Vol 62 (7) ◽  
pp. o2714-o2716 ◽  
Author(s):  
N. David Karis ◽  
Wendy A. Loughlin ◽  
Ian D. Jenkins ◽  
Peter C. Healy
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Van Der Waals ◽  
The Other ◽  
Van Der Waals Interactions ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Compound C ◽  
Independent Molecules

The title compound, C9H10N2O5, crystallizes with two crystallographically independent molecules in the asymmetric unit. In the crystal structure, the nitropyridone rings are connected by weak C—H...O interactions, forming sheet-like arrays, which are in turn linked by C—H...π and π–π interactions between the nitropyridone rings on one side, and by C—H...O and van der Waals interactions between the ester groups on the other.

1-Benzoyl-3-[(2-benzylsulfanyl)phenyl]thiourea

2012 ◽  
Vol 68 (12) ◽  
pp. o485-o487 ◽  
Author(s):  
Tirtha Bhattacharjee ◽  
Prasanta Gogoi ◽  
Vedavati G. Puranik ◽  
Rupesh L. Gawade ◽  
Pranjit Barman
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Van Der Waals ◽  
Membered Ring ◽  
Van Der Waals Interactions ◽  
Intermolecular Hydrogen Bonds ◽  
Compound C

In the title compound, C21H18N2OS2, a strong intramolecular N—H...O hydrogen bond [N...O = 2.642 (3) Å] between the amide N atom and the benzoyl O atom forms an almost planar six-membered ring in the central part of the molecule. In the crystal, molecules are packed through weak N—H...S interactions. Intra- and intermolecular hydrogen bonds and van der Waals interactions are the stabilizing forces for the crystal structure.

scholarly journals 5-{2-(4-Chlorophenyl)-1-[2-(4-chlorophenyl)-1-(3,4,5-trimethoxyphenyl)ethoxy]ethyl}-1,2,3-trimethoxybenzene

2012 ◽  
Vol 68 (4) ◽  
pp. o1007-o1007
Author(s):  
Ying Fu ◽  
Mu Yuan ◽  
Xuemei Hu ◽  
Yanshou Yang ◽  
Hongxia Hou
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
Torsion Angles ◽  
Compound C ◽  
Benzene Rings

The title compound, C34H36Cl2O7, is a by-product from the reaction of 4-chlorobenzylzinc chloride with 3,4,5-trimethoxybenzaldehyde. In each of the two 1,2-diphenylethyl moieties, the two benzene rings are arranged in atransconformation and make Car—C—C—Cartorsion angles of 163.64 (19) and 174.43 (18)°. The crystal structure is stabilized by van der Waals interactions only.

scholarly journals Crystal structure of 1-benzyl-4-(2,4-dichlorophenyl)-2-imino-1,2,5,6,7,8,9,10-octahydrocycloocta[b]pyridine-3-carbonitrile

2014 ◽  
Vol 70 (11) ◽  
pp. 441-443 ◽  
Author(s):  
R. A. Nagalakshmi ◽  
J. Suresh ◽  
S. Maharani ◽  
R. Ranjith Kumar ◽  
P. L. Nilantha Lakshman
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Pyridine Ring ◽  
Van Der Waals ◽  
Chair Conformation ◽  
Van Der Waals Interactions ◽  
Dihedral Angles ◽  
Compound C

In the title compound, C25H23Cl2N3, the cyclooctene ring adopts a twist chair–chair conformation. The dihedral angles between the central pyridine ring (r.m.s. deviation = 0.013 Å) and the pendant chlorobenzene and benzyl rings are 78.07 (11) and 87.47 (12)°, respectively. No directional interactions could be identified in the crystal and the packing is governed by van der Waals interactions.

scholarly journals 2,2′-Bithiophene-3,3′-dicarbonitrile

2012 ◽  
Vol 68 (8) ◽  
pp. o2542-o2542 ◽  
Author(s):  
J. Josephine Novina ◽  
G. Vasuki ◽  
Durai Karthik ◽  
K. R. Justin Thomas
Keyword(s):  
Crystal Structure ◽  
Bond Length ◽  
Intermolecular Interactions ◽  
Title Compound ◽  
Van Der Waals ◽  
Ring System ◽  
Van Der Waals Interactions ◽  
Maximum Deviation ◽  
Inversion Center ◽  
Compound C

The complete molecule of the title compound, C10H4N2S2, is generated by an inversion center situated at the mid-point of the bridging C—C bond. The bithiophene ring system is planar [maximum deviation = 0.003 (2) Å] and the central C—C bond length is 1.450 (2) Å. There are no significant intermolecular interactions in the crystal structure, which is stabilized by van der Waals interactions.

scholarly journals Sulfathiazolium nitrate monohydrate

2006 ◽  
Vol 62 (4) ◽  
pp. o1573-o1574
Author(s):  
Afroza Banu ◽  
G. M. Golzar Hossain
Keyword(s):  
Crystal Structure ◽  
Nitric Acid ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Room Temperature ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
Compound C ◽  
Network Of Hydrogen Bonds ◽  
Dilute Nitric Acid

The title compound, C9H10N3O2S2 +·NO3 −·H2O, was obtained from a solution of sulfathiazole in dilute nitric acid at room temperature. The crystal structure is stabilized by a network of hydrogen bonds and van der Waals interactions.

scholarly journals 3-(2,4-Dichlorophenyl)-5-(4-fluorophenyl)-2-phenyl-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine

2012 ◽  
Vol 68 (6) ◽  
pp. o1923-o1923
Author(s):  
Ju Liu ◽  
Zhi-Qiang Cai ◽  
Yang Wang ◽  
Yu-Li Sang ◽  
Li-Feng Xu
Keyword(s):  
Dihedral Angle ◽  
Title Compound ◽  
Phenyl Ring ◽  
Crystal Packing ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
Compound C ◽  
Benzene Rings ◽  
Planar Systems

In the title compound, C25H13Cl2F4N3, there are four planar systems, viz. three benzene rings and a pyrazolo[1,5-a]pyrimidine system [r.m.s. deviation = 0.002 Å]. The dihedral angle between the dichlorophenyl ring and the unsubstituted phenyl ring is 69.95 (5)°, while that between the fluorophenyl ring and the unsubstituted phenyl ring is 7.97 (10)°. The crystal packing is dominated by van der Waals interactions. A Cl...Cl interaction of 3.475 (3) Å also occurs.

Tetrakis[(1-phenyltetrazol-5-yl)sulfanylmethyl]methane

2007 ◽  
Vol 63 (3) ◽  
pp. o1145-o1147 ◽  
Author(s):  
Alexander S. Lyakhov ◽  
Marina V. Zatsepina ◽  
Tatiana V. Artamonova ◽  
Pavel N. Gaponik ◽  
Grigorii I. Koldobskii
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Rotation Axis ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
Π Interactions ◽  
Compound C

The title compound, C33H28N16S4, prepared by the divergent method, presents a core unit for further synthesis of tetrazole-containing dendrimers. The central C atom lies on a crystallographic twofold rotation axis. π–π Interactions and weak non-classical C—H...N hydrogen bonds are responsible for the formation of layers parallel to the bc plane, with van der Waals interactions between them.

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