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Polyether esters are rapidly formed employing the interfacial condensation of organotin dihalides with glycyrrhetinic acid in high yield and oligomeric to polymeric chain length. Infrared spectroscopy shows the formation of tin–oxygen bonds. The products are a mixture of bridging and non-bridging structures about the tin atom. Proton NMR and MALDI MS results are consistent with the formation of the...
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