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Neue planar-chirale Moleküle – Synthese, Enantiomerentrennung, Circulardichroismus, Racemisierungsschwelle und Röntgenstrukturanalyse in der Dithia [2.2]metacyclophan-Reihe

Vögtle, Fritz ; Meurer, Kurt ; Mannschreck, Albrecht ; Stühler, G. ; Puff, Heinrich ; Roloff, Albrecht ; Sievers, Rolf


Preparation and properties of the planar-chiral [2.2]phanes 1a – d and of the sulfone 2c are described. The enantiomers of the ester 1c have been separated on triacetylcellulose. The circular dichroism and the racemization barrier for the enantiomers have been determined. The X-ray analysis of 1c for the first time gives precise data on the spacial relationships in ...


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