Selective alkane co-inclusion by methylene- and adamantane-bridged macrocycle with biphenyl units

Abstract

A methylene- and adamantane-bridged macrocycle with biphenyl units showed selective co-inclusion of n-hexane among the hexane isomers through crystallization. In the use of n-pentane or n-heptane, inclusion crystals with alkanes were not formed.

Structure analysis of inclusion crystals of diimide-based macrocycles with halocarbons

“…6a). 35 We found that macrocycle (4) had a nearly rhombic structure with a cavity, in which dichloromethanes as crystallization solvent were contained by means of C-H⋯π and C-H⋯O interactions between the hydrogen atoms of the dichloromethanes and the biphenyl units or the oxygen atoms of the methoxy groups. The use of dibromomethane instead of dichloromethane resulted in the formation of crystal 4a.…”