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US 6,476,271 B2Granted
Process for the preparation of ether-free salts of tetrakis(pentafluorophenyl) borate
AssigneeHoneywell International Inc.
InventorMichael Van Der Puy
Life of this patent
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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.
Claims11
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.
2 more elements
Dependencies are inferred from the claim text.