Competitive H-bonding in bicyclic bis-lactams: self-assembly in nanotubes or in unbalanced chiral threefold interpenetrated diamondoid network
摘要:
The first example of an H-bonded diamondoid network formed by a chiral molecule is reported. Diamondoid networks in the crystal structure of the described bicyclic bis-lactam are homochiral and threefold interpenetrated, two of them being of one chirality and the third of the other. Thus, unbalanced chiral packing (sp. gr. 141, z = 12) and spontaneous resolution with ee 33% is observed. A slight change in the structural formula leads to an entirely different crystal structure with nanosize channels. (C) 2002 Elsevier Science Ltd. All rights reserved.