On the conformational and packing behaviour of acyclic sugar amphiphiles: The crystal structures of N-(1-octyl)-d-arabinonamide and N-(1-dodecyl)- d-ribonamide and the supramolecular assembly-forming properties of N-(1-octyl)-d-pentonamides
作者:Christoph André、Peter Luger、Reinhard Bach、Jürgen-Hinrich Fuhrhop
DOI:10.1016/0008-6215(94)00260-m
日期:1995.1
Abstract The crystal structure of N-(1- octyl)- d -arabinonamide [space group P2 1 , a=4.855(3) A , b=30.45(3) A , c=10.59(1) A , β=94.46(6)° ] shows two independent molecules arranged in an antiparallel manner in the asymmetric unit. Their head groups and octyl chains are extended, but the overall shape of the molecules is different. The packing arrangement in the crystal, with interdigitating head
摘要N-(1-辛基)-d-阿拉伯酰胺[空间群P2 1,a = 4.855(3)A,b = 30.45(3)A,c = 10.59(1)A,β= 94.46(图6)°显示了以不平行的方式在不对称单元中排列的两个独立分子。它们的头基和辛基链是延伸的,但分子的整体形状是不同的。以前从未见过使用醛糖酰胺在晶体中具有相互交叉的头基和低聚亚甲基尾部的堆积排列,但与葡萄糖两亲物MEGA-8的堆积排列相同。晶体中阿拉伯糖酰胺分子的堆积与以反平行排列方式结晶的其他两亲物的堆积的比较显示出类似的行为,表明这些化合物结晶的共同机理。N-(1-十二烷基)-d-核糖酰胺[空间群P1,a = 4.815(2)A,b = 5。464(2)A,c = 18.084(4)A,a = 81.77(2)°,β= 87.78(3)°,γ= 83.83(3)°在不对称单元中显示一个分子。它分别显示了两个从C-2至C-5和C-2至C