75838-38-9Relevant academic research and scientific papers
High birefringence bistolane liquid crystals: Synthesis and properties
W?g?owska, Dorota,Kula, Przemys?aw,Herman, Jakub
, p. 403 - 408 (2016/01/09)
Twenty liquid crystals both symmetrical and non-symmetrical bistolanes with terminal alkyl, alkoxy and alkylsulfanyl chain and lateral methyl or ethyl group have been synthesized via Sonogashira cross-coupling and their mesomorphic properties have been studied. Most compounds exhibit an enantiotropic nematic phase in a broad temperature range (>40 °C). Optical properties of selected compounds have been investigated. They exhibit a high value of birefringence (>0.4).
Oligomerization of (diacetoxyiodo)benzene with trifluoromethanesulfonic acid. Preparation and structure of hypervalent iodine oligomers
Kitamura, Tsugio,Wakimoto, Ichiro,Nakamura, Tetsu,Fujiwara, Yuzo
, p. 253 - 255 (2008/02/13)
(equation presented) Treatment of (diacetoxyiodo)benzene with an excess amount of trifluoromethanesulfonic acid (TfOH) gives hypervalent iodine oligomers after quenching by aqueous NaBr. The thermolysis by KI yielding p-diiodobenzene and iodobenzene indicates that the structure for the oligomers consists of p-phenylene unit. The iodine oligomers in situ generated react with aromatic substrates such as benzene, toluene, and chlorobenzene to give the corresponding arylated iodine oligomers.
