Disubstituted tolans and preparation thereof

Abstract

Abstract Tolans are provided having the formula IN WHICH EACH OF R and R1 is an alkyl or alkoxy group, the sum of the number of carbon atoms in R and R1 being at least 2 but less than 21, provided that when R and R1 are both alkoxy or both alkyl the sum of the number of carbon atoms is at least 9 but less than 21 and further provided that each of R and R1 has at least 1 but less than 11 carbon atoms. The tolans of the invention are useful as nematics in diverse fields such as thermometry, display and television. The tolans also are useful in forming birefringent plates with fixed or variable delay, as solvents for polarising filters and as anisotropic solvents, especially in optical spectroscopy and nuclear magnetic resonance.

Inventors

• 👤 Jean Jacques

Bibliographic Details