The homologous series of N,N′,N″-trialkanoyl-2,4,6-trimethyl-1,3,5-benzenetriamines has been prepared. The viscous birefringent melts are given by the butyryl to hexadecanoyl derivatives. The X-ray diffraction pattern recorded for the octanoyl derivative and the higher homologous members consists of two sharp inner peaks and a broad outer one assignable to the 100, 110, and 001 reflections respectively, indicating that the phase is hexagonal disordered columnar (Dhd). A more-structured high-temperature phase is displayed at lower temperatures by the nonanoyl to hexadecanoyl derivatives.

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