scholarly journals CXVIII.—Influence of an unsaturated linking on the optical activity of certain derivatives of bornylamine

1899 ◽  
Vol 75 (0) ◽  
pp. 1149-1155
Author(s):  
Martin Onslow Forster
Keyword(s):  
Optical Activity ◽  
Derivatives Of

Crystal data of branched-chain derivatives of D-psicose

1981 ◽  
Vol 14 (6) ◽  
pp. 473-475
Author(s):  
N. Sharafi ◽  
G. Donnay ◽  
P. C. M. Herve du Penhoat ◽  
A. S. Perlin
Keyword(s):  
Nmr Spectroscopy ◽  
Oxygen Atom ◽  
Optical Activity ◽  
Crystal Data ◽  
Crystalline Phases ◽  
Space Groups ◽  
Cell Dimensions ◽  
Branched Chain ◽  
Derivatives Of ◽  
Ether Molecule

Crystal data are reported for six derivatives of 1,2-O-isopropylidene-3-C-(pyridin-2-yl)-β-D-psicopyranose, C14H19NO6, previously studied in solution by NMR spectroscopy. Molecules that differ only by the replacement of H by CH3 on one non-ring oxygen atom, converting an alcohol to an ether molecule, show no similarity in cell dimensions, and have different numbers of molecules per cell. All six phases belong to non-centrosymmetric space groups, four to P212121 and two to P21; in agreement with previously reported optical activity of these molecules in solution, it is concluded that only molecules of one-and-the-same handedness are present in any one of the crystalline phases.

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