Synthesis and structural characterization of some arylamidinium diphenylphosphinates: Formation of one-, two- and three-dimensional networks by charge-assisted hydrogen bonds

Polyhedron ◽  
2005 ◽  
Vol 24 (8) ◽  
pp. 927-939 ◽  
Author(s):  
Jianping Guo ◽  
Wai-Kwok Wong ◽  
Wai-Yeung Wong
Keyword(s):  
Hydrogen Bonds ◽  
Structural Characterization ◽  
Three Dimensional

scholarly journals Synthesis by self-assembly and structural characterization of a new co-crystal system {[Cu(NO3)2(H2O)2]L1(NO3)2} (L1 = 1,1′-dibenzyl-3,3′-butyl-diimidazolium-2,2′-diylidene) from copper nitrate and a carbene precursor

2008 ◽  
Vol 6 (4) ◽  
pp. 505-508 ◽  
Author(s):  
Jorge Doimeadios
Keyword(s):  
Solid State ◽  
Hydrogen Bonds ◽  
Structural Characterization ◽  
Self Assembly ◽  
Three Dimensional ◽  
Building Blocks ◽  
Copper Nitrate ◽  
Supramolecular Network ◽  
Crystal System

AbstractHerein, the first example of a co-crystal system formed by an imidazolium nitrate, a carbene precursor, and copper (II) nitrate, {[Cu(NO3)2(H2O)2]L1(NO3)2} (1) (L1 = 1,1′-dibenzyl-3,3′-butyl-diimidazolium-2,2′-diylidene) is reported. These two building blocks are connected in the solid state through hydrogen bonds to generate a three-dimensional supramolecular network.

4-(Piperidin-1-yl)pyridinium hexafluorophosphate at 150 K

2003 ◽  
Vol 59 (11) ◽  
pp. o622-o624 ◽  
Author(s):  
Bruce D. James ◽  
Siti Mutrofin ◽  
Brian W. Skelton ◽  
Allan H. White
Keyword(s):  
Hydrogen Bonds ◽  
Structural Characterization ◽  
Title Compound ◽  
Ion Pairs ◽  
Piperidine Ring ◽  
Torsion Angles ◽  
Compound C ◽  
Counter Ions

Structural characterization of the title compound, C10H15N2 +·PF6 −, shows it to be ionic, with the pyridine rather than the piperidine N atom being protonated and forming hydrogen bonds to the counter-ions, resulting in two independent ion pairs. A number of unusual features are noted, in particular the remarkably close inter-ring hydrogen contacts [1.97 (3)–2.00 (3) Å] and the considerable differences in the pair of cations, in respect of the torsion angles within the piperidine ring involving the bonds to either side of the N atom.

Design, synthesis, and three-dimensional structural characterization of a constrained Ω-loop excised from interleukin-1α

Tetrahedron ◽  
1993 ◽  
Vol 49 (17) ◽  
pp. 3629-3640 ◽  
Author(s):  
Ramakanth Sarabu ◽  
Kathleen Lovey ◽  
Vincent S. Madison ◽  
David C. Fry ◽  
David N. Greeley ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Three Dimensional ◽  
Design Synthesis ◽  
Interleukin 1Α

scholarly journals Synthesis and structural characterization of hexa-μ2-chlorido-μ4-oxido-tetrakis{[4-(phenylethynyl)pyridine-κN]copper(II)} dichloromethane monosolvate

2021 ◽  
Vol 77 (1) ◽  
pp. 42-46
Author(s):  
Rayya A. Al Balushi ◽  
Muhammad S. Khan ◽  
Md. Serajul Haque Faizi ◽  
Ashanul Haque ◽  
Kieran Molloy ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Structural Characterization ◽  
Title Compound ◽  
Three Dimensional ◽  
Hirshfeld Surface ◽  
The Core ◽  
Dimensional Network ◽  
Packing Arrangement

In the crystal structure of the title compound, [Cu4Cl6O(C13H9N)4]·CH2Cl2, the core molecular structure consists of a Cu4 tetrahedron with a central interstitial O atom. Each edge of the Cu4 tetrahedron is bridged by a chlorido ligand. Each copper(II) cation is coordinated to the central O atom, two chlorido ligands and one N atom of the 4-phenylethynylpyridine ligand. In the crystal, the molecules are linked by intermolecular C—H...Cl interactions. Furthermore, C—H...π and π–π interactions also connect the molecules, forming a three-dimensional network. Hirshfeld surface analysis indicates that the most important contributions for the packing arrangement are from H...H and C...H/H...C interactions.

scholarly journals Synthesis and Characterization of [2-CH3CH2C6H4NH3]6P6O18⋅4H2O

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Houda Marouani ◽  
Salem Slayyem Al-Deyab ◽  
Mohamed Rzaigui
Keyword(s):  
Hydrogen Bonds ◽  
Electrostatic Interactions ◽  
Three Dimensional ◽  
Spectroscopic Studies ◽  
Monoclinic System ◽  
Dimensional Network ◽  
Cell Dimensions ◽  
Unit Cell Dimensions ◽  
Ir Spectroscopic

Single crystals of [2-CH3CH2C6H4NH3]6P6O18⋅4H2O are synthesized in aqueous solution by the interaction of cyclohexaphosphoric acid and 2-ethylaniline. This compound crystallizes in the monoclinic system with P21/c space group the unit cell dimensions are: a=16.220(4) Å, b=10.220(5) Å, c=20.328(4) Å, β=113.24(3)∘, Z=2, and V=3096.5(18) Å3. The atomic arrangement can be described by layers formed by cyclohexaphosphate anions P6O186− and water molecules connected by hydrogen bonds O–H⋯O. These inorganic layers are developed around bc planes at x=1/2 and are interconnected by the H-bonds created by ammonium groups of organic cations. All the hydrogen bonds, the van der Waals contacts and electrostatic interactions between the different entities give rise to a three-dimensional network in the structure and add stability to this compound. The thermal behaviour and the IR spectroscopic studies of this new cyclohexaphosphate are discussed.

Structural Characterization of Linear Three-Dimensional Random Chains: Energetic Behaviour and Anisotropy

2021 ◽  
pp. 179-191
Author(s):  
David R. Avellaneda B. ◽  
Ramón E. R. González ◽  
Paola Ariza-Colpas ◽  
Roberto Cesar Morales-Ortega ◽  
Carlos Andrés Collazos-Morales
Keyword(s):  
Structural Characterization ◽  
Three Dimensional

scholarly journals Structural Basis for Env Incorporation into HIV-1 Particles

Proceedings ◽  
2020 ◽  
Vol 50 (1) ◽  
pp. 114
Author(s):  
R. Elliot Murphy ◽  
Alexandra B. Samal ◽  
Gunnar Eastep ◽  
Ruba H. Ghanam ◽  
Peter E. Prevelige ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Late Phase ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Structural Basis ◽  
Membrane Interactions ◽  
Env Protein ◽  
Gag Assembly ◽  
Hiv 1

During the late phase of the HIV-1 replication cycle, the Gag polyproteins are transported to the plasma membrane (PM) for assembly. Gag targeting and assembly on the PM is dependent on interactions between its matrix (MA) domain and phosphatidylinositol-4,5-bisphosphate (PI(4,5)P2). Subsequent to Gag assembly, the envelope (Env) protein is recruited to the PM for incorporation into virus particles. Evidence suggests that the incorporation of the Env protein is mediated by interactions between the MA domain of Gag and the cytoplasmic tail of the gp41 subunit of Env (gp41CT), a mechanism that remains to be elucidated. Trimerization of the MA domain of Gag appears to be an obligatory step for this interaction. The interplay between gp41CT, the MA trimer, and the membrane has yet to be determined. Our lab has pioneered methods and approaches to investigate, at the molecular level, how the retroviral MA domains of Gag interact with membranes, a key requirement for understanding the Gag assembly and Env incorporation. Herein, we devised innovative approaches that will enable the structural characterization of the gp41CT–MA–membrane interactions. We employed structural biology (NMR and cryo-electron microscopy, biophysical methods, and biochemical tools to generate a macromolecular picture of how the MA domain of Gag binds to the membrane and how it interacts with gp41CT. To this end, we: (i) determined the three-dimensional structure of HIV-1 gp41CT and characterized its interaction with the membrane, (ii) engineered trimeric constructs of gp41CT and the MA to recapitulate the native and functional states of the proteins, and (iii) utilized membrane nanodisc technology to anchor the MA and gp41CT proteins. Our studies will allow for a detailed structural characterization of the gp41CT–MA–membrane interactions, which will advance our knowledge of HIV-1 Gag assembly and Env incorporation.

Synthesis, crystallization, X-ray structural characterization and solid-state assembly of a cyclic hexapeptoid with propargyl and methoxyethyl side chains

2017 ◽  
Vol 73 (3) ◽  
pp. 399-412 ◽  
Author(s):  
Consiglia Tedesco ◽  
Eleonora Macedi ◽  
Alessandra Meli ◽  
Giovanni Pierri ◽  
Giorgio Della Sala ◽  
...  
Keyword(s):  
Solid State ◽  
Hydrogen Bonds ◽  
Structural Characterization ◽  
Crystal Form ◽  
Side Chains ◽  
Crystal Forms ◽  
Hydrate Crystal ◽  
The Stability ◽  
Efficient Packing

The synthesis and the structural characterization of a cyclic hexapeptoid with four methoxyethyl and two propargyl side chains have disclosed the presence of a hydrate crystal form [form (I)] and an anhydrous crystal form [form (II)]. The relative amounts of form (I) and form (II) in the as-purified product were determined by Rietveld refinement and depend on the purification procedures. In crystal form (I), peptoid molecules assemble in a columnar arrangement by means of side-chain-to-backbone C=CH...OC hydrogen bonds. In the anhydrous crystal form (II), cyclopeptoid molecules form ribbons by means of backbone-to-backbone CH2...OC hydrogen bonds, thus mimicking β-sheet secondary structures in proteins. In both crystal forms side chains act as joints among the columns or the ribbons and contribute to the stability of the whole solid-state assembly. Water molecules in the hydrate crystal form (I) bridge columns of cyclic peptoid molecules, providing a more efficient packing.

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