Chiral Discrimination of the Diastereomeric Salts with (R)-Nipecotic Acid and Tartaric Acid Derivative

2013 ◽  
Vol 781-784 ◽  
pp. 135-138
Author(s):  
Xiao Xia Sun ◽  
Ying Chun Li ◽  
Xiao Xiao Zhuang ◽  
Yu Hu
Keyword(s):  
Molecular Structure ◽  
Single Crystal ◽  
Tartaric Acid ◽  
Self Assembly ◽  
Optical Purity ◽  
Chiral Discrimination ◽  
Single Crystal Diffraction ◽  
Nipecotic Acid ◽  
High Optical Purity ◽  
Diastereomeric Salts

An effective resolving agent, (D)-dibenzoyl tartaric acid (2b), was screened to yield direct resolution of (S)- ethyl nipecotate (1) with high optical purity and yield. Molecular recognition was studied by 1H NMR, IR, DSC and single crystal diffraction of the pair of diastereomeric salts. The less-soluble salt formed a supra molecular structure by enantio differentiating self-assembly.

The effect of the supramolecular network of (Z)-3-(4-(diphenylamino)phenyl)-2-(pyridin-2-yl)-acrylonitrile on the fluorescence behavior of a single crystal: experimental and theoretical studies

CrystEngComm ◽  
2014 ◽  
Vol 16 (36) ◽  
pp. 8591-8604 ◽  
Author(s):  
M. Judith Percino ◽  
Margarita Cerón ◽  
Guillermo Soriano-Moro ◽  
M. Eugenia Castro ◽  
Víctor M. Chapela ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Optical Properties ◽  
Single Crystal ◽  
Molecular Interactions ◽  
Self Assembly ◽  
Supramolecular Network ◽  
Theoretical Studies ◽  
Unsaturated Nitrile ◽  
Experimental And Theoretical Studies

The molecular structure, molecular interactions, self-assembly behaviour and optical properties of a α,β-unsaturated nitrile were analyzed.

scholarly journals Appealing Copper(I) and Silver(I) Coordination Polymers with an Unprecedented Betainoid Assembling Ligand

2019 ◽  
pp. 24-28
Author(s):  
Dylan Amelot ◽  
Ammar Hassoun ◽  
Lise-Marie Chamoreau ◽  
Hani Amouri ◽  
Jamal Moussa
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Coordination Polymers ◽  
Elemental Analysis ◽  
Self Assembly ◽  
Spectroscopic Methods ◽  
Photoluminescence Properties ◽  
Single Crystal Diffraction ◽  
Coinage Metals ◽  
Solid State Structures

Two coordination polymers of coinage metals with a rare pyridinium-betainoid L assembling ligand are reported. These polymers are obtained by self-assembly of the linker L and copper(I) or silver(I) ions in acetonitrile. The compounds were characterized by spectroscopic methods and by elemental analysis. The solid-state structures were unambiguously confirmed by single crystal diffraction studies. These assemblies exhibit original helicoidal arrangements. The UV-Vis. absorption and photoluminescence properties are reported as well.

A vacuum chamber for low background diffraction experiments

1996 ◽  
Vol 211 (9) ◽  
Author(s):  
R. B. Neder ◽  
M. Burghammer ◽  
Th. Grasl ◽  
H. Schulz
Keyword(s):  
Single Crystal ◽  
Vacuum Chamber ◽  
Single Crystal Diffraction ◽  
Low Background

AbstractWe developed a small vacuum chamber for very low background single crystal diffraction experiments. The chamber has been designed for a large Eulerian cradle. The

Combined high resolution powder and single-crystal diffraction to determine the structure of Li1+xCeIIIxCeIV6-xF25

2007 ◽  
Vol 2007 (suppl_26) ◽  
pp. 455-460 ◽  
Author(s):  
G. Renaudin ◽  
E. Mapemba ◽  
M. El-Ghozzi ◽  
M. Dubois ◽  
D. Avignant ◽  
...  
Keyword(s):  
High Resolution ◽  
Single Crystal ◽  
Single Crystal Diffraction

scholarly journals Environmentally Friendly Nafion-Catalyzed Synthesis of Substituted 2-Ethyl-3-Methylquinolines from Aniline and Propionaldehyde under Microwave Irradiation

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 877
Author(s):  
Chieh-Kai Chan ◽  
Chien-Yu Lai ◽  
Cheng-Chung Wang
Keyword(s):  
Reaction Mechanism ◽  
Microwave Irradiation ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Environmentally Friendly ◽  
Single Crystal Diffraction ◽  
X Ray ◽  
Related Data ◽  
Heating Source ◽  
Chemical Structures

Herein, we report a facile synthetic methodology for the preparation of 2,3-dialkylquinolines from anilines and propionaldehydes. This cyclization involved environmentally friendly Nafion® NR50 as an acidic catalyst with microwave irradiation as the heating source. A series of substituted 2-ethyl-3-methylquinolines were prepared from various anilines and propionaldehyde derivatives through this protocol with good to excellent yields. Some new chemical structures were confirmed by X-ray single-crystal diffraction analysis and the related data were provided. The plausible reaction mechanism studies are also discussed.

scholarly journals Synthesis of Bis(Carboranyl)amides 1,1′-μ-(CH2NH(O)C(CH2)n-1,2-C2B10H11)2 (n = 0, 1) and Attempt of Synthesis of Gadolinium Bis(Dicarbollide)

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1321
Author(s):  
Yasunobu Asawa ◽  
Aleksandra V. Arsent’eva ◽  
Sergey A. Anufriev ◽  
Alexei A. Anisimov ◽  
Kyrill Yu. Suponitsky ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Single Crystal ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
X Ray Diffraction ◽  
Stable Conformation ◽  
Acyl Chlorides ◽  
X Ray ◽  
Cesium Fluoride ◽  
The Stability

Bis(carboranyl)amides 1,1′-μ-(CH2NH(O)C(CH2)n-1,2-C2B10H11)2 (n = 0, 1) were prepared by the reactions of the corresponding carboranyl acyl chlorides with ethylenediamine. Crystal molecular structure of 1,1′-μ-(CH2NH(O)C-1,2-C2B10H11)2 was determined by single crystal X-ray diffraction. Treatment of bis(carboranyl)amides 1,1′-μ-(CH2NH(O)C(CH2)n-1,2-C2B10H11)2 with ammonium or cesium fluoride results in partial deboronation of the ortho-carborane cages to the nido-carborane ones with formation of [7,7′(8′)-μ-(CH2NH(O)C(CH2)n-7,8-C2B9H11)2]2−. The attempted reaction of [7,7′(8′)-μ-(CH2NH(O)CCH2-7,8-C2B9H11)2]2− with GdCl3 in 1,2-dimethoxy- ethane did not give the expected metallacarborane. The stability of different conformations of Gd-containing metallacarboranes has been estimated by quantum-chemical calculations using [3,3-μ-DME-3,3′-Gd(1,2-C2B9H11)2]− as a model. It was found that in the most stable conformation the CH groups of the dicarbollide ligands are in anti,anti-orientation with respect to the DME ligand, while any rotation of the dicarbollide ligand reduces the stability of the system. This makes it possible to rationalize the design of carborane ligands for the synthesis of gadolinium metallacarboranes on their base.

scholarly journals Post‐synthetic modification unlocks a 2D‐to‐3D switch in MOF breathing response: a single‐crystal‐diffraction mapping study

2021 ◽  
Author(s):  
Lee Brammer ◽  
Elliot J. Carrington ◽  
Stephen F. Dodsworth ◽  
Sandra van Meurs ◽  
Mark R. Warren
Keyword(s):  
Single Crystal ◽  
Mapping Study ◽  
Single Crystal Diffraction ◽  
2D To 3D
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