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Lithium tetrakisborate is the lithium salt of the weakly coordinating anion 4]. Because of its weakly coordinating abilities, lithium tetrakisborate makes it commercially valuable in the salt form in the catalyst composition for olefin polymerization reactions and in electrochemistry. It is a water-soluble compound. Its anion is closely related to the non-coordinating anion known as BARF. The tetrakisborates have the advantage of operating on a one-to-one stoichiometric basis with Group IV transition metal polyolefin catalysts, unlike methylaluminoxane which may be used in large excess.
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