Process for the preparation of ether-free salts of tetrakis(pentafluorophenyl) borate
AssigneeHoneywell International Inc.
InventorMichael Van Der Puy
Life of this patent
Estimating the term…
Abstract
A method is provided for making substantially ether-free alkali metal tetrakis(pentafluorophenyl) borate salts from tetrakis(pentafluorophenyl) borate magnesium bromide and converting the alkali metal tetrakis(pentafluorophenyl) borate salts to essentially ether-free trityl tetrakis(pentafluorophenyl) borate.
Claims39
A method for preparing sodium or potassium tetrakis(pentafluorophenyl) borate compound from a pentafluorophenyl magnesium bromide comprising the steps of:
- reacting the (pentafluorophenyl) magnesium bromide in an ether with a tris(pentafluorophenyl) borane in an aromatic hydrocarbon solvent to produce tetrakis(pentafluorophenyl) borate magnesium bromide;
- reacting the tetrakis(pentafluorophenyl) borate magnesium bromide with an aqueous solution of a halide selected from the group consisting of sodium chloride and potassium chloride to create an organic phase containing a product compound selected from the group consisting of tetrakis(pentafluorophenyl) borate sodium salt and tetrakis(pentafluorophenyl) borate potassium salt;
- separating the organic phase;
- and
- removing solvent from the organic phase to provide a substantially ether-free compound selected from the group consisting of sodium tetrakis(pentafluorophenyl) borate and potassium tetrakis(pentafluorophenyl) borate.
A method for making an essentially ether-free trityl tetrakis(pentafluorophenyl) borate comprising the steps of:
- providing a substantially ether-free compound selected from the group consisting of sodium tetrakis(pentafluorophenyl) borate and potassium tetrakis(pentafluorophenyl) borate;
- reacting the substantially ether-free compound with a trityl halide in a hydrocarbon liquid to form a slurry of trityl tetrakis(pentafluorophenyl)borate and a halide in a hydrocarbon liquid;
- separating the trityl tetrakis (pentafluorophenyl) borate and halide from the hydrocarbon liquid by a method selected from the group consisting of filtration and decantation;
- dissolving trityl tetrakis(pentafluorophenyl) borate in a halogenated solvent to form a solution, said halogenated solvent free of oxygen, nitrogen or other coordinating atoms;
- and
- removing the solvent from the trityl tetrakis(pentafluorophenyl) borate solution.
Solid, essentially ether-free trityl-tetrakis(pentafluorophenyl) borate.
Dependencies are inferred from the claim text.