In the title compound (5HIN), C(9)H(8)O(2), is perfectly planar as all atoms, except the H atoms of both CH(2) groups, lie on a crystallographic mirror plane. In the crystal, mol-ecules are linked by strong inter-molecular O-H⋯O hydrogen bonds, forming an infinite chain along [100], generating a C(8) motif.

A non-chiral ferroelectric nematic compound with a 1,3-dioxane unit in the mesogenic core called 2,3?,4?,5?-tetrafluoro-[1,1?-biphenyl]-4-yl 2,6-difluoro-4-(5-propyl-1,3-dioxan-2-yl) benzoate (DIO) was studied by dielectric spectroscopy frequency range 0.1 Hz–10 MHz over wide of temperatures. The exhibits three phases on cooling from isotropic phase, i.e., ordinary paraelectric N; intermediate ...