In the course of the preparation of phenyleneand phthalate-siloxy copolymers with-C6H4O- Si-and-O2CC6H4CO2Si-, di-triorganosilyl derivatives of hydroquinone and resorcinol, 1, 4 (1, 3)-di-triorganosiloxy benzene (R3HQ and R3RC), those of bisphenol-A (BPA), 2, 2-bis-(4- triorganosiloxyphenyl)-propane (R3BPA), and terephthalic acid, bi. t-triorganosilyl terephthalate (R3TPA) were isolated in pure states. R3HQ and R3RC were prepared from ...
