Novel fluorine-containing bis(tetraarylcyclopentadienones)

Abstract

277 Previously, we prepared new representatives of bis(tetraarylcyclopentadienones) (BTACPDs) [1], monomers used in the synthesis of phenyl substituted polyphenylenes (PSPPs) [2–4] and polyimides (PSPIs) [5] by the Diels–Alder reaction [6]. PSPPs and PSPIs are of considerable interest as polymers that combine high thermal characteristics and low dielec tric constants with good processibility and excellent complex forming properties [7]. Fluorine containing PSPPs and PSPIs are of special interest because the introduction of fluorine into polymer macromolecules leads to a further decrease in dielectric constant and enhancement of polymer solubility [8, 9]. Owing to these advantages, fluorinated PSPPs attracted consid erable interest of researchers as interlaminar dielec trics in multiintegrated circuits. Therefore, in this work, we attempted to synthesize previously unknown fluorinated BTACPDs with fluorine in hexafluoroiso propylidene core fragments or phenyl rings and to study their spectral characteristics.