Electrophilic Metal-Alkyl bond Cleavage in Tetraorganosilicon and Tetraorganotin Compounds by Lead Tetracarboxylates and Aryllead Tricarboxylates

摘要

Methyl-silicon bond cleavage of tetramethylsilane occurs with aryllead(IV) tricaboxylates in trifluoroacetic acid to produce aryl(methyl)lead(IV) bistrifluoroacetates in high yield. An extension of the study to tetraalkylstannanes has shown that alkyl-tin cleavage by lead(IV) carboxylates proceeds even in chloroform, while a detailed study of the reactions of lead tetraacetate with tetraalkylstannanes indicated the reaction to be an electrophilic cleavage rather than one involving an electron transfer mechanism.