Reaction of Dimethyl Sulfide-Triborane(7) with Trimethylamine. Facile Formationof Bis(trimethylamine)-Diborane(4)

摘要

Dimethyl sulfide-triborane (7) underwent reaction with trimethylamine at -80 C indichloromethane or in dimethyl sulfide, and B2H4.2N(CH3)3 and BH3.N(CH3)3 were produced. The process of this reaction was monitored from -80 C up to +20 C by using B NMR spectroscopy, and the result was compared with that of the reaction of tetrahydrofuran-triborane (7) with trimethylamine; which gave the same final products but proceeded through the initial formation of B3H7.N(CH3)3. The two different reaction pathways were discussed in terms of the mechanistic model that was presented earlier.