Belt 2 is a yellow powder that can be dissolved in halogenated solvents and slightly dissolved in THF or DMSO. Belt 2 is fairly stable in air and under light or heating. A single crystal of 2 was obtained by the slow diffusion of n-pentane into a 1,2dichloroethane solution. The crystal structure of 2 belongs to trigonal space group R 3 " . As shown in Figures and, 2 exhibits a tubular belt structure with approximately 9.5 Å pore and 4.4 Å height. Six p-methoxyphenyl substituents project radially out from the center of the belt. The packing structure of 2 revealed a columnar structure with side-by-side packing, and there were no notable π-π interactions between neighboring molecules (Figure ).