Results 91 to 100 of about 3,131,133 (230)
Chiral Modification of the Tetrakis(pentafluorophenyl)borate Anion with Myrtanyl Groups [PDF]
, 2019 The synthesis and characterization of chiral [B(C6F5)4]– derivatives bearing a myrtanyl group instead of a fluoro substituent in the para position are described.
Oestreich, Martin, Pommerening, Phillip
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N-(4-Chlorophenyl)-7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboximide
Acta Crystallographica Section E, 2010 In the title racemic compound, C14H10ClNO3, which contains four stereogenic centres, the cyclohexane ring tends towards a boat conformation, while the tetrahydrofuran and dihydrofuran rings adopt envelope conformations.
Jian Li
doaj +1 more source
Trihexyphenidyl hydrochloride: a powder diffraction study
Acta Crystallographica Section E, 2010 In the cation of the title compound [systematic name: 1-(3-cyclohexyl-3-hydroxy-3-phenylpropyl)piperidinium chloride], C20H32NO+·Cl−, the cyclohexyl and piperidine rings are in chair conformations. In the crystal structure, cations and
Norberto Masciocchi +2 more
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Chiral Ionic Liquids: Synthesis, Properties, and Enantiomeric Recognition [PDF]
, 2008 We have synthesized a series of structurally novel chiral ionic liquids which have a either chiral cation, chiral anion, or both. Cations are an imidazolium group, while anions are based on a borate ion with spiral structure and chiral substituents. Both
Lindeman, Sergey V. +2 more
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Characterization of the conglomerate form of acetyl-dl-leucine by thermal analysis and solubility measurements [PDF]
, 2012 Starting from a mixture of enantiomers in solution, crystallization can generate different types of crystals. In order to determine which type of crystal is obtained in the case of acetylleucine, an active pharmaceutical ingredient (API), analytical ...
Autret, Jean Marie +4 more
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(3,4-Dihydroxyoxolan-2-yl)methyl 4-methylbenzenesulfonate
Acta Crystallographica Section E, 2010 The racemic title compound, C12H16O6S, possesses a five-membered ring that adopts an envelope-shaped conformation; the two hydroxy groups occupy quasi-axial positions. Adjacent molecules are linked by O—H...O hydrogen bonds to generate a ribbon
Sergey Dibrov +2 more
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Phase chirality and stereo-selective swelling of cholesteric elastomers [PDF]
, 2003 Cholesteric elastomers possess a macroscopic ``phase chirality'' as the director n rotates in a helical fashion along an optical axis $z$ and can be described by a chiral order parameter.
A. R. Tajbakhsh +18 more
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Unravel hidden symmetry breaking in racemic compounds
Racemic compounds, consisting of an equimolar mixture of enantiomers in crystalline form, are conventionally regarded as fully symmetric and are often dismissed as a trivial phenomenon due to their abundance—as they account for a substantial fraction (90–95%) of entries in structural databases.
Weihao Wang +4 more
openaire +1 more source
rac-2-Bromo-3-ethoxy-1,3-bis(4-methoxyphenyl)propan-1-one
Acta Crystallographica Section E, 2009 In the racemic (S,S/R,R) title compound, C19H21BrO4, the two benzene rings are almost coplanar to each other, forming a dihedral angle of 3.58 (10)°.
Hoong-Kun Fun +3 more
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2-(2-Nitrophenylsulfinyl)acetonitrile
Acta Crystallographica Section E, 2013 In the title compound, C8H6N2O3S, the dihedral angle between the nitro group and the benzene ring is 6.76 (9)°. The bond-angle sum at the S atom is 308.1°.
Hocine Merazig +3 more
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