Article

How different are diastereomorphous orientations of enantiomers in the liquid crystalline phases of PBLG and PBDG: a case study.

Technische Universität Darmstadt, Clemens Schöpf Institut für Organische Chemie und Biochemie, Petersenstr. 22, 64287 Darmstadt, Germany.
Magnetic Resonance in Chemistry (impact factor: 1.44). 06/2009; 47(9):734-40. DOI:10.1002/mrc.2454 pp.734-40
Source: PubMed

ABSTRACT The orientational properties of the two enantiomers of an example compound, namely isopinocampheol [(+)- and (-)-IPC] in the two enantiomers of a liquid crystalline phase, namely Poly-gamma-benzyl-L/D-glutamate (PBLG/PBDG) with the organic cosolvent CDCl(3), were investigated. The interactions can be either enantiomorphous, leading to equal orientations and residual dipolar couplings (RDCs), or diastereomorphous, leading to different orientations and RDCs. The difference between the two diastereomorphous orientations was determined to be rather small (5 degrees in the Euler angle beta). Furthermore, we investigated whether one of the two diastereomorphous interactions is favored.

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Keywords

5 degrees
 
different orientations
 
enantiomorphous
 
equal orientations
 
Euler angle beta
 
example compound
 
liquid crystalline phase
 
organic cosolvent CDCl(3)
 
orientational properties
 
residual dipolar couplings
 
small
 
two diastereomorphous interactions
 
two diastereomorphous orientations
 
two enantiomers
 

Andreas Marx