Results 101 to 110 of about 23,430 (289)
, 1997 Mixing of powdered (-)- and (+)-enantiomer crystals in the solid state gives crystals of the racemic compound. This racemic crystal formation was followed by IR spectral measurement of a 1 :1 mixture of (-)- and (+)-enantiomer crystals as a Nujol mull ...
26915 +11 more
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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
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Separation and enrichment of enantiopure from racemic compounds using magnetic levitation [PDF]
, 2018 Crystallization of a solution with high enantiomeric excess can generate a mixture of crystals of the desired enantiomer and the racemic compound. Using a mixture of S-/RS-ibuprofen crystals as a model, we demonstrated that magnetic levitation (MagLev ...
Wong, Shin Yee +6 more
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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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Determining the enantioselectivity of chiral catalysts - mass spectrometry as a mechanistic and screening tool [PDF]
, 2014 This thesis is focused on the application of ESI-MS as a screening method and mechanistic tool for organocatalyzed reactions. In previous studies cationic metal complexes or iminium ions were the key intermediates to be detected by ESI-MS analysis.
Bächle, Florian
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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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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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A relationship between the associating power of optical isomers, and the formation of racemic compounds [PDF]
, 1926 It has been shown that substances which do not associate, or do so only to a slight extent, yield melting point curves for their optical isomers which either definitely show the absence of a racemic compound, or show that it is unlikely to be present
Ross, John David McBeath
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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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Influence of solvent and the operating conditions on the crystallization of racemic mandelic acid
, 2004 The crystallization of racemic mandelic acid is studied in unseeded batch cooling experiments in four solvent systems. Apart from the thermodynamically stable racemic compound, a metastable modification of the racemic compound is also found to initially ...
Rasmuson, Åke C.,, Profir, Veronica M.,
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