Folding of aromatic oligoimides of trans-1,2-diaminocyclohexane.
نویسندگان
چکیده
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.
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عنوان ژورنال:
- Chemical communications
دوره 6 شماره
صفحات -
تاریخ انتشار 2002