Crystal structure of undecyloxybenzoic acid

The crystal and molecular structure studies of the mesogen, undecyloxybenzo ic acid are reported. The compound(C18H28O3) crystallises in the triclinic space group P1 (1) over bar with a = 8.0495(10)Angstrom, b = 13.024(4)Angst rom, c = 4.7383(14)Angstrom, alpha = 92.97(3)degrees, beta = 102.910(14)deg rees, gamma = 82.319(19)degrees. V = 848.1(3)Angstrom (3) Z = 2, D-(cal) = 1.145 Mg/m(3), mu = 0.076 mm(-1). F-000 = 320, GoF = 1.072, R1 = 0.071. It is shown that the phase transitions and physical properties of the mesogen are strongly dependent on the dimer formation.