Method for producing tetrakis (pentafluorophenyl) borate derivative using pentafluorophenyl alkali metal salt prepared from pentafluorobenzene

摘要

PURPOSE: To produce a tetrakis(pentafluorophenyl)borate derivative as an important intermediate of cocatalyst in preparing a cation complex polymerization catalyst in high yield from inexpensive pentafluorobenzene. ;CONSTITUTION: Pentafluorobenzene expressed by the formula C₆HF₅ in an amount of 1 equivalent is made to react with 0.5-1.5 equivalent organometallic compound expressed by the general formula RM in an ether-based solvent, a hydrocarbon-based solvent or a mixed solvent of this ether-based solvent with the hydrocarbon-based solvent at -120 to 80°C to afford a pentafluorophenyl alkali metal salt expressed by the formula C₆H₅M and 1 equivalent boron compound expressed by the formula BX₃ is made to react with ≥3.7 equivalent of the pentafluorophenyl metal compound expressed by the formula C₆H₅M to produce the objective tetrakis(pentafluorophenyl)borate derivative expressed by the formula (C₆F₅)₄BM.;COPYRIGHT: (C)1994,JPO&Japio