The effect of phenyl ring on the physical properties of liquid crystals containing 4-pyridyl terminal group was written by Chen, Ran;Qin, Yuanyuan;An, Zhongwei;Chen, Xinbing;Chen, Pei. And the article was included in Liquid Crystals in 2018.Quality Control of 2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane This article mentions the following:
Liquid crystals with 4-pyridyl end group containing one triple bond and phenylenes was synthesized. Their structures were confirmed by traditional spectroscopic methods. The properties were measured by differential scanning calorimetry (DSC), polarising optical microscopy (POM), Abbe refractometer and an elec. constants instrument. The results showed that all of the compounds exhibit nematic phase. The addition of a phenylene to the mol. skeleton brings about an obvious increase of the mesophase intervals (from 8.8 to 95.5) and birefringence (up to 0.33), as well as minus or plus effect of dielec. anisotropies depending on the position of the phenylene. D. Functional Theory (DFT) calculations of mol. conformation, polarisability and dipole moment were used to further study the mol. structure-property relationship. In the experiment, the researchers used many compounds, for example, 2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 68716-49-4Quality Control of 2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane).
2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 68716-49-4) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Grignard and organolithium reagents are powerful tools for organic synthesis, and the most common products of their reactions are alcohols.Quality Control of 2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts