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US RE38,325 E1Granted
Method for the production of tetrakis (pentafluorophenyl) borates
AssigneeBoulder Scientific Company
InventorTerry E. Krafft
Life of this patent
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Abstract
A process for preparing tetrakis (pentafluorophenyl) borate is described that involves reaction of a pentafluorophenyl magnesium halide with an alkali metal tetrafluoroborate.
Claims7
A method for the production of tetrakis (pentafluorophenyl) borate which comprises reacting a pentafluorophenyl compound having the formula C6F5MgX in which X is a halide with an alkali metal salt of tetrafluoroborate in a non-interfering solvent.
A method which comprises reacting a compound having the formula C6F5MgX in which X is a halide with a compound having the formula QBF4 in which Q is sodium, lithium or potassium,
- said reaction being conducted at a temperature of 0° C. to 100° C. in a solvent being the formula R—O—R′ in which R and R′ are the same or different aliphatic hydrocarbon groups having 2 to 10 carbon atoms to produce a reaction mixture containing a tetrakis (pentafluorophenyl) borate and
- recovering said tetrakis (pentafluorophenyl) borate from said reaction mixture.
Dependencies are inferred from the claim text.