Enantiomer resolution, barrier to ring inversion, circular dichroism spectrum and absolute configuration of cycloocta[2,1-b: 3,4-b′]dipyridine

1992 ◽  
pp. 1625-1628 ◽  
Author(s):  
Parviz Rashidi-Ranjbar ◽  
Jan Sandström ◽  
Henry N. C. Wong ◽  
Xiu Chun Wang
Keyword(s):  
Circular Dichroism ◽  
Absolute Configuration ◽  
Circular Dichroism Spectrum ◽  
Ring Inversion ◽  
Enantiomer Resolution ◽  
Circular Dichroïsm

scholarly journals Chromatographic Enantiomer Separation, Circular Dichroism Spectrum, and Absolute Configuration of the 7-Methoxycoumarin syn Head-to-Tail Dimer.

1991 ◽  
Vol 45 ◽  
pp. 1076-1079 ◽  
Author(s):  
Tihamér Hargitai ◽  
Per Reinholdsson ◽  
Jan Sandström ◽  
Carsten M. Nielsen ◽  
Hugh Brian Dunford ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Absolute Configuration ◽  
Circular Dichroism Spectrum ◽  
Enantiomer Separation ◽  
Circular Dichroïsm

Synthesis, resolution and spectral properties of the cobalt(III) complex of the hexadentate ligand 2,2',2'-[(cyclohexane-1,3,5-triyl)trithio]tris(ethanamine)

1981 ◽  
Vol 34 (12) ◽  
pp. 2499 ◽  
Author(s):  
LR Gahan ◽  
AM Sargeson
Keyword(s):  
Circular Dichroism ◽  
Absolute Configuration ◽  
Circular Dichroism Spectrum ◽  
Spectral Properties ◽  
Ligand Field ◽  
Hexadentate Ligand ◽  
Circular Dichroïsm ◽  
Field Transition

The synthesis of a potentially hexadentate ligand 2,2',2''-[(cyclohexane-l,3,5-triyl)trithio]tris(ethanamine) (atch) is described. The ligand forms a hexadentate cobalt(III) complex which has been resolved into its catoptric forms. The (+)520-[Co(atch)]3+ complex displays a strikingly large dichroism in the region of the first ligand field transition in the circular dichroism spectrum with Δε480+ 11.9 mol-1 1. cm-1 and has been assigned the Λ absolute configuration by comparisons of the circular dichroism with those of similar complexes of known absolute configuration. Attempts to cap the complex by using nitromethane and formaldehyde under basic conditions are described.

Crystal structure of aristoserratine

1983 ◽  
Vol 36 (5) ◽  
pp. 1037 ◽  
Author(s):  
IRC Bick ◽  
MA Hai ◽  
VA Patrick ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Circular Dichroism ◽  
Single Crystal ◽  
Absolute Configuration ◽  
Circular Dichroism Spectrum ◽  
X Ray Diffraction ◽  
Relative Configuration ◽  
X Ray ◽  
The Absolute ◽  
Circular Dichroïsm

The crystal structure of the alkaloid aristoserratine,* C20H24N2O, has been determined by single-crystal X-ray diffraction methods at 295 K, the structure being refined to a residual of 0.034 for 1107 independent 'observed' reflections. Crystals are monoclinic, P21, a 14.836(5), b 8.568(3), c 6.633(3) �, β 98.05(3)�, Z 2. The relative configuration is established and, by inference, by comparison of the circular dichroism spectrum with that of aristoteline, the absolute configuration is assigned.

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