V-shaped nematogens with the “magic bent angle”†
Abstract
V-shaped nematogens 1a–c and 2a–b with benzodithiophene bending units have been synthesised. The derivatives 1a–c comprise a flat core with a bending angle of 109°, which is almost the tetrahedral angle proposed to be optimal in the realization of mesogens forming a biaxial nematic thermotropic mesophase.