Hydrochloric Acid → 4'-Hexyl[1,1'-biphenyl]-4-carboxylic acid

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Reaction Steps

5 Gram of 4-n-hexyl-4'-cyanobiphenyl, 40 ml of diethylene glycol, 4 ml of water and 2 g of sodium hydroxide were introduced into 200 ml three neck flask and heated with stirring for 25 hours, followed by acidifying with hydrochloric acid, separating by filtration and recrystallizing with glacial acetic acid to give 4.1 g of 4-n-hexyl-biphenyl-4'-carboxylic acid (II), which was a colorless crystal having a molecular formula of C19H22O2 (composition: C 80.8%, H 7.9%, O 11.3% as calculated values and C 80.4%, H 8.1%, O 11.5% as observed values) and a melting point of 170° -171° C and formed a smectic liquid crystal at temperatures exceeding the melting point.

Provenance & Evidence