Despite the importance of enantiopure chiral sulfoxides, few methods exist that allow for their deracemization. Here, we show that an enantiopure sulfoxide can be produced from the corresponding racemate using Viedma ripening involving rearrangement-induced racemization. The suitable candidate for Viedma ripening was identified from a library of 24 chiral sulfoxides through X-ray structure dete...

Chiral seperation also called chiral resolution,is a procedure used to seperate the two isomers of a racemic compound. Many Chiral stationary phases(CSP’S) have been manufactured for the seperation of enantiomers.Among them Chiral-AGP is the protein based chiral column . α1-acid glycoprotein (AGP) is a very stable protein, which tolerates pure organic solvents,high temperatures and high and low...

Abstract Two vanadium complexes of mandelic acid having [Fe( bpy ) 3 ] 2+ as counterion, ][V 2 O 4 ( rac - mand ]·4.9H O·0.1CH CN 1 , FeV L and (H O)[Fe( [V 7 S ·28H = 2,2’-bipyridine, 2– mandelato ligand, C 8 H 6 have been synthesized characterized by single crystal X-ray diffraction spectral methods. The FeSO — —KVO —H O—CH system exhibits a stereospecific behaviour: while from the including ...

The cholesteric twist inversion by temperature variation of a single component thermotropic liquid crystalline system was experimentally investigated and is explained by the partial twisting power model, evaluating the temperature dependent pitch of five different configurations of a benzoic acid biphenyl ester with two chiral centers. The temperature dependence of the twisting power and the ch...

Four new chiral polymers of BINOLSalen-cobalt ACHTUNGTRENNUNG(III) salt complexes have been designed, synthesized and applied to the direct fabrication of chiral propylene carbonate from racemic propylene oxide. The (R/S)-polymer catalyst 2 and (S/R)-polymer catalyst 4 exhibit better enantioselectivity than the (R/R)-polymer catalyst 1 and the (S/S)-polymer catalyst 3 and have been recovered an...

Imprinting of cholesteric textures in a polymer network is a method of preserving a macroscopically chiral phase in a system with no molecular chirality. By modifying the elastic properties of the network, the resulting stored helical twist can be manipulated within a wide range since the imprinting efficiency depends on the balance between the elastic constants and twisting power at network fo...

Molecular dynamics (MD) simulations are becoming the tools of choice in material science to assess atomic-level information on the structure and dynamics of complex systems. This report presents a detailed description of the improved self-sorting of chiral molecules confined inside carbon nanotubes (CNTs) cavities of different diameters, using the racemic R/S-GVL a chiral green solvent as the m...

Experimental data for a series of central and simple molecules in biosystems show that some amino acids and a simple sugar molecule have a chiral discrimination in favor of homochirality. Models for segregation of racemic mixtures of chiral amphiphiles and lipophiles in aqueous solutions show that the amphiphiles with an active isomerization kinetics can perform a spontaneous break of symmetry ...

Introduction: The aims of this study were to evaluate whether menthol smoking and race/ethnicity are associated with nicotine dependence in daily smokers. Methods: The study used two subsamples of U.S. daily smokers who responded to the 2010-2011 Tobacco Use Supplement to the Current Population Survey. The larger subsample consisted of 18,849 non-Hispanic White (NHW), non-Hispanic Black (NHB), ...