Abstract
The bis(p-n-hexadecylbiphenylbutane-1,3-dionato)copper(II) complex shows a dimer discotic rectangular ordered columnar (D ro ) mesophase as the same case as the hexadecyloxy derivative. The lattice constants of the two-dimensional rectangular system are a = 47.74 Å. b = 16.8 Å. It was shown that the oxygen atoms in the peripheral alkoxy chains have no effect on the formation of the dimers.