Abstract

Thiobenzoyl isocyanate forms 1 1 adducts with trimethylsilyl-, -germyl-, and -stannyldialkylamine. In the adducts from the silyl and germylamines, the trimethylmetal group can migrate between an oxygen and nitrogen atom. On the other hand, the adduct from the stannylamine prefers the S-metallated structure, which is consistent with the “softer” acid character of the tin compared with the silicon or germanium atom. The existence of intramolecular coordination of carbonyl oxygen with the trimethyltin group in a six-membered cycle structure, is suggested.

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