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Abstract

A diamidine compound is used to complex to a catalytic metal atom. This can be dissolved in an organic solution for homogenous catalytic reactions, such as a hydrogenation, polymerization reaction. The metal complex can be separated from the reactant solution after the reaction by bubbling carbon dioxide through the solution causing the formation of diamidinium bicarbonate, which is insoluble in organic solution and can be recovered in an aqueous medium. The diamidinium bicarbonate can be further converted back into an organic soluble diamidine by bubbling the aqueous solution with argon or nitrogen, permitting the reuse of the catalyst in homogeneous catalytic reactions.

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First Claim