Liquid Crystals Based on Hypervalent Sulfur Fluorides: Pentafluorosulfuranyl as Polar Terminal Group

Peer Kirsch; Matthias Bremer; Michael Heckmeier; Kazuaki Tarumi

doi:10.1002/(SICI)1521-3773(19990712)38:13/14<1989::AID-ANIE1989>3.0.CO;2-K

Liquid Crystals Based on Hypervalent Sulfur Fluorides: Pentafluorosulfuranyl as Polar Terminal Group

Angew Chem Int Ed Engl. 1999 Jul 12;38(13-14):1989-1992. doi: 10.1002/(SICI)1521-3773(19990712)38:13/14<1989::AID-ANIE1989>3.0.CO;2-K.

Authors

Peer Kirsch¹, Matthias Bremer¹, Michael Heckmeier¹, Kazuaki Tarumi¹

Affiliation

¹ Merck KGaA, Liquid Crystals Division, D-64271 Darmstadt (Germany), Fax: (+49) 6151-72-2593.

Abstract

The somewhat "exotic" pentafluorosulfuranyl functionality is one of the strongest electron-withdrawing groups with a purely inductive effect. Owing to its chemical stability and the resulting high dipole moment of its aromatic derivatives, this group was crucial to the design and synthesis of a new class of highly polar liquid crystals (such as 1) for application in active matrix displays. A computational model was developed with the aim to understand and predict the electrooptic properties of liquid crystals based on hypervalent sulfur fluorides.

Keywords: Hypervalent compounds; Liquid crystals; Mesogens; Molecular modeling; Sulfur.