Divalent germanium and tin compounds are provided. The divalent germanium and tin compounds have been found to be efficient catalysts for the formation of polyurethanes. Methods for making polyurethanes using the catalysts are also provided.

 
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< Processes for polyurethane polymerization using polysilyl derivatives of germanium and tin as catalysts

> Process for the synthesis of hydroxy aromatic acids

> Methods for forming multilayer structures
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