Crystal structure and mesogenic behaviour of a new fluorene derivative: 9,9-dimethyl-2,7-bis(4-pentylphenyl)-9H-fluorene

Acta Crystallogr C Struct Chem. 2019 Nov 1;75(Pt 11):1459-1464. doi: 10.1107/S2053229619013007. Epub 2019 Oct 4.

Abstract

The title compound, C37H42, is a new mesogenic compound containing the fluorene moiety. It exhibits enantiotropic nematic liquid crystalline behaviour with melting at 125 °C and isotropization at 175 °C. The crystallographically independent unit contains two molecules oriented face-to-edge with respect to each other. The two molecules have nearly the same conformation of the bis-phenyl fluorene moiety. The molecular packing in the crystal phase is nematic-like.

Keywords: fluorene; mesogen; nematic phase. crystal structure.

Publication types

  • Research Support, Non-U.S. Gov't