with the director inclined from the helix axis by an
angle lower than 90 deg (oblique helix) is believed to be
formed because of a negative bend elastic constant[6] or
a large flexoelectric effect.[7, 8] Such conditions are realized for
the bent molecules, for example dimers with rigid cores
connected by sufficiently flexible linkers with an odd number
of carbon atoms[9] or hydrogen bonds,[10] and bent-core
molecules.[11] Since the heliconical structure of the NTB
phase is not related to molecular chirality, the obvious
question arises: what effect does the molecular chirality