Folding of aromatic oligoimides of trans-1,2-diaminocyclohexane.
Chiral oligomeric diimides prepared from pyromellitic dianhydride, (R,R)-1,2-diaminocyclohexane and phthalic anhydride fold into M or P helical conformers; trimer 1 folds into the P conformer in the crystal but the M conformer dominates in solution; longer chain oligomers 2 and 3 form preferentially P conformers in solution, as a result of intermolecular interactions.
Gawronski
Jacek
J
Department of Chemistry, A. Mickiewicz University, Poznan, Poland. gawronsk@amu.edu.pl
Gawronska
Krystyna
K
Grajewski
Jakub
J
Kacprzak
Karol
K
Rychlewska
Urszula
U