Tetraorganothallium ate complex

Chemoselectivity was also observed in the reaction of mixed tetraorganothallium ate complexes. Butyltrimethylthallium and dibutyldi-methylthallium ate complexes delivered preferentially their butyl ligands upon reaction with cyclohexenone (Scheme 20.9). The same behaviour was observed with mixed methyl-acetynyl ate complexes, which almost exclusively transfer the acetylenic ligand. 

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