Substitution of the [closo–1–CB11H12 ]- cluster with 4-alkoxypyridinium fragments at the C(1) position and alkyl groups at the B(12) position leads to highly polar liquid crystals 1. This class of compounds exhibits Smectic A phases and high dielectric anisotropy in nematic solutions. To synthesize series 1, the amine derivative [closo–1–CB11H11–1–NH3 ] was first iodinated to form a mixture of two isomers (1,7 and 1,12), which were separated by crystallization. The desired [closo–1–CB11H11–1–NH3–12–I] was then coupled with the appropriate alkyl Grignard reagent. The resulting alkyl amine was reacted with 4-alkoxypyrilium triflates to give series 1. Here we report the synthesis and characterization of the new compounds using thermal, optical, and X-ray methods

Synthesis of highly polar pyridinium liquid crystals derived from the [closo–1–CB11H12]- anion

254th National Meeting (2017)

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